Answer:
Reinforcements effects behavior because when you enforce something rather good or bad it puts a picture in the persons mind weather they are doing something good or bad.
Explanation:
what would a permanent magnetic substance be called? a. soft magnet c. hard magnet b. fast magnet d. quick magnet please select the best answer from the choices provided a b c d
A permanent magnetic substance be called a hard magnet.
Option C is correct.
What is a hard magnet?Hard magnets, also referred to as permanent magnets can be described as those magnetic materials that retain their magnetism after being magnetized.
Examples of magnet function include the following:
Mechanical to mechanical attraction and repulsion.Mechanical to electrical, such as generators and microphones.Electrical to mechanical also found in motors, loudspeakers, charged particle deflection.Mechanical to heat found in as eddy current and hysteresis torque devices.Learn more about hard magnets at: https://brainly.com/question/14256749
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a 54kg cube accelerates at 1.3 m/s^2/ if it was pushed at 164 n what is the coefficient of friction between the cube and the ground
The coefficient of friction between the cube and the ground is 0.177.
Friction is a shape of contact pressure. It exists between the surfaces that are in touch. The frictional force relies upon on the character of the floor in contact. The rougher the ground, the extra the friction is involved. The frictional force is proportional to the urgent pressure, that is the burden of the body. it's miles impartial of the place of the touch.
Calculation:-
F = ma
= 54 × 1.3 m/s²
= 70.2
force required = 164 N
so friction force = 164 - 70.2 N
= 93.8 N
normal force = mg
= 54 × 9.8
= 529.2 N
Friction force = μN
μ = Friction force/N
= 93.8 / 529.2
= 0.177
Friction is the force resisting the relative motion of sturdy surfaces, fluid layers, and material factors sliding towards each specific. There are numerous styles of friction. Dry friction is a strain that opposes the relative lateral movement of two stable surfaces in touch.
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he three blocks (from left to right in the figure) have masses of 3.38 kg, 0.702 kg and 7.80 kg. the leftmost block has a velocity of 3.51 m/s toward the right, the center block is stationary, and the rightmost block as a velocity of 2.79 m/s toward the left. assuming movement toward the right is positive, what is the velocity of the center-of-mass of this system as pictured (prior to collision)? give your answer with the appropriate sign.
-0. 833m/s is the velocity of the centre-of-mass of this system, prior to the collision.
What is Centre-of-mass?
The unique location where the weighted relative position of the distributed mass accumulates to zero is known as the centre of mass of a distribution of mass in space (also known as the balance point). At this location, a force can be applied to produce a linear acceleration alone, not an angular acceleration.
What is Collision?
In physics, the abrupt, violent meeting of two bodies in direct contact is referred to as an impact. Examples of such bodies are two pool cues, a golf club and a ball, a hammer and a nail head, two railroad cars when linked, or a falling object and a floor. The force and the amount of time the objects are in touch, in addition to the materials the two objects are made of, have an impact on the outcome of the impact. It is generally knowledge that a hard steel ball dropped on a steel plate would rebound almost to the original position from where it was dropped, while a ball made of putty or lead will not.
What are the Calculations?
There are typically 3 masses named
m1= 3.38kg
m2= 0.702kg
m3= 7.80kg
Here m2 stays stationary hence its velocity (v2= 0)
Let the final velocity be V
Value of m1 + m2 + m3 = 3.38 + 0.702 + 7.8 = 11.882kg
A/Q V= m1v1/11.882 + m2v2/11.882 + m3v3/11.882
m1v1/11.882= 3.38 * 3.51/11.882= 0.998
m3v3/11.882= 7.8 * (-2.79) /11.882= -1. 831 ( here -ve sign is taken as the velocity of m3 is towards the left which is negative)
Hence, after simplifying V= m1v1/11.882 + m2v2/11.882 + m3v3/11.882 the final answer is -0. 833m/s
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what was the key physical property in determining the two catergories of palnets during solar system formation
Answer: physical characteristic during the formation of the solar system most significantly contributed to the distinction between the two types of planets
Instead, look for the crucial physical characteristic that, during the formation of the solar system, distinguished between the two kinds of planets.
Explanation: What characteristics does the solar system have in terms of physics?
Dimensions of the Solar System
The novice teacher lists the characteristics of the solar system's constituent parts. defining ideas The Sun is the centre of the solar system, which also includes planets, dwarf planets, moons, comets, asteroids, meteoroids, dust, atomic particles, electromagnetic radiation, and magnetic fields.
Which two broad categories would you say our solar system's planets fall under?
The two categories of planets—terrestrial and giant—are typically used to categorize them. The four inner planets make up the four terrestrial planets: Mercury,
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A long narrow uniform stick of length D and mass ms = m lies motionless on frictionless surface of ice puck of mass Mlp m slides without spinning on the ice with a velocity Vo toward the stick; collides elastically with one end of the stick, and rebounds in the opposite direction with velocity Vf After the collision, the center of mass of the stick moves with velocity V$, and the stick rotates about the center of mass with angular velocity Ws . Throughout the process, from finite time before the collision to finite time after the collision, the angular momentum of the rod and puck system is constant bout which of the following points? Select that apply; The center of mass of the rod-puck system The center of mass of the rod The center of mass of the puck The fixed point on the ice where the center of mass of the system was located when puck collided with the rod Any fixed point in space Angular momentum is not constant around any point
Throughout the process, from a finite time before the collision to a finite time after the collision, the angular momentum of the rod and puck system is constant about any fixed point in space.
The condition of conservation of angular momentum of a system about a point is that net torque about that point of the system must be zero. The point that has zero net torque is any fixed point in space.
τ = I α
I = L / ω
τ = L ω / ω t
τ = L / t
Since L is constant, τ = 0
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what is the value of q/m for a particle that moves in a circle of radius 6.8 mm in a 0.50 t magnetic field if a crossed 260 v/m electric field will make the path straight?
If a crossover 260 v/m magnetic field will render the path straight, then the value of q/m for a piece moving within a circle at size 6.8 mm in some kind of a 0.50 t magnetic field is 0.0982 T.m2.
Simply put, what's a magnetic field?The region around a magnet where the effects of magnetism are felt is known as the magnetic field. To describe that how magnetic force is dispersed in the area around and inside something magnetic in nature, we utilize the magnetic flux as a tool.
Briefing :
Given, magnitude of magnetic field, B = 0.5 T
radius of the loop, r = 6.88 m
Area is given by;
A = πr²
A = 3.142 x (6.88)²
A = 148.72 m²
The magnitude of the magnetic flux through the loop is given by;
Ф = BA
Where;
B is the magnitude of the magnetic field
A is area of the field
Ф = 0.5 x 0.1964
Ф = 0.0982 T.m²
Therefore, the magnitude of the magnetic flux through the loop is 0.0982 T.m²
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What can one say about the size of the magnification of a single convex mirror?
It is greater than one It is equal to one. It is less than one.
A convex mirror can never provide more than one in magnification effect. This is so because a convex mirror's image of the thing is smaller than the object itself.
When an object is held 30 cm away from a convex mirror, the image it creates is half the size of the actual object. A convex mirror is a kind of spherical mirror in which the reflecting surface is the protruded portion of the sphere; in other words, the reflecting surface of these mirrors protrudes outward in the direction of the incident light source. Enlarging something's seeming size—rather than its actual size—is known as magnification. A calculated value known as "magnification" is used to measure this enlargement.
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A metal cools from an initial temperature of 225 oc to 25 oc and releases 160 j of heat energy. If the mass of the metal is 5. 0 g, what is its specific heat capacity?.
If a metal cools while releasing 160 j of heat energy, its specific heat capacity is 1.4222 J/kg. In the event that the metal weighs 5.0 g
How is the change of specific heat calculated given the temperature?
The equation q = mcT, where m is the sample mass, c is the specific heat, and T is the temperature change, can be used to determine how much heat is absorbed or lost by a sample (q).
T₁ = 225°C
T₂ = 25°C
q = -160 J
m = 5.0 g
As we know,
q = mcΔT
Now,
-160 = 5*c*(T₂-T₁)
-160 = 5*c*(25-225)
c = -160/5(-200)
c = 0.16 J/g°c.
How can you determine the ultimate temperature given the initial?
To calculate your substance's final heat, multiply the temperature change by the starting temperature.For instance, if your water started out at 24 degrees Celsius, it final
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sort the galaxy rotation curves according to whether they would support or refute the hypothesis that galaxies are made up only of visible matter.
The claim is refuted -rotation curve 1, -rotation curve 3, -rotation curve 2 -supports Rotation Curve 4, Rotation Curve 6, and Rotation Curve 5
Curves is a particular kind of workout.You can work every significant muscle area with Curves since it combines stretching, cardio, and upper- and lower-body strength training routines. It may be done by people of all fitness levels and employs hydraulic resistance gym equipment created specifically for ladies.
To Curves, may guys go?Although males are permitted to join in some jurisdictions, Curves fitness and weight reduction facilities are focused solely on and built for women. Competitors of the clubs include Spa Lady and Lucille Roberts, two chains that cater only to women.
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is the total momentum before the collision equal the total momentum after the collision. if not, what are the possible differences as to why
The overall momentum of the system can be thought of as being conserved because the total momentum before and after the collision is the same. As a result, the system receives no net external impulse.
Momentum is a vector quantity that is influenced by the object's direction. During collisions between objects, momentum is a relevant concept. The total momentum before a collision between two objects equals the total momentum after the impact (in the absence of external forces).
The law of conservation of momentum is this. It holds true in every collision. According to the principle of momentum conservation, momentum is only modified by the action of forces as they are outlined by Newton's equations of motion; momentum is never created nor destroyed inside a problem domain.
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energy conservation with conservative forces: a 60-kg skier pushes off the top of a frictionless hill with an initial speed of 4.0 m/s. how fast will she be moving after dropping 10 m in elevation? air resistance is negligible.
As stated in the query, 14.57 m/s is the velocity at which one would go after descending 10 m in height.
What exactly is a frictionless encounter?A Frictionless Guest Experience: What Is It? Any stage in a customer's relationship with a business where they experience friction is when they run into a roadblock that brings them down or makes them unhappy. Customer gives seamless service, in the simplest fundamental way, entails monitoring their path and improving their encounter.
Briefing:Here we can use the concept of mechanical energy conservation
Ui + KEi = Uf + KEf
mgh₁ + 1/2 mv²i = mgh₂ + 1/2 mv²f
Now we know that,
vi = 4m/s
m = 60kg
h₁ = 0m
h₂ = -10m As its going down
now from above equation we will have
n + 1/2(60)(1)² = (60)(9.81)(-10)+1/2(60)v²f
180 = -5886 + 30v²f
v²f = 212.2
vf = 14.57m/s
So his speed will be 14.57m/s
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A small car collides head-on with a large SUV. Which of the following statements concerning this collision are correct?
A. Both vehicles are acted upon by the same average force during the collision.
B. The small car is acted upon by a greater average force than the SUV.
C. The small car undergoes a greater change in momentum than the SUV.
D. Both vehicles undergo the same change in momentum.
A small car collides head-on with a large SUV, both vehicles undergo the same change in magnitude of momentum.
The collision also called effect, in physics, is the unexpected, forceful coming together in direct contact of bodies, which includes, for an instance, billiard balls, a golf membership and a ball, a hammer and a nail head, railroad automobiles while being coupled together, or a falling item and a floor.
Physicists use collisions to determine the houses of atomic and subatomic debris. Essentially, a particle accelerator is a device that provides a managed collision system among subatomic debris so that, amongst other things, some of the houses of the target particle can be studied. The maximum common motive of an automobile collision is distracted use.
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a proton is at rest at the plane vertical boundary of a region containing a uniform vertical magnetic field b. an alpha particle moving horizontally makes a head-on elastic collision with the proton. immediately after the collision, both particles enter the magnetic field, moving perpendicular to the direction of the field. the radius of the proton's trajectory is 4.0 r. find the radius of the alpha particle's trajectory as a factor of r. the mass of the alpha particle is four times that of the proton, and its charge is twice that of the proton.
The radius of the alpha particle's trajectory is 4.0 r.
What is elastic collision?An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.
Given: the mass of the alpha particle is four times that of the proton, and its charge is twice that of the proton.
After elastic collision, the speed of the proton and the alpha particle will be in a ratio of 2: 1.
Let, the speed of the proton be2 v then the speed of the alpha particle be v.
So, the proton's trajectory is = 2mv/qB = 4.0 r
Hence, alpha particle's trajectory is = (4m×v)/(2qB)
=2mv/qB
=4.0 r
= 4.0r.
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a noisy machine in a factory produces a decibel rating of 72 db. how many identical machines could you add to the factory without exceeding the 85 db limit?
There are 10 identical machines could you add to the factory without exceeding the 85 dB limit.
Calculation:-
sound leve in decibel is:
β dB = 10 log ( I / Io )
where I is the intensity of sound
It is the relative intensity
72 = 10 logs ( I /10⁻¹²)
8 = log ( I /10⁻¹²)
10⁸ = I / 10⁻¹²
I = 10⁸ . 10⁻¹² = 10⁻⁴ W /m2
If the sound level is 85 dB, the number of identical machines is n.
85 = 10 logs ( n I / Io )
= 10 logs ( n . 10⁻⁴ / 10⁻¹² )
9 = log ( n . 108 )
10⁹ = n. 10 8
n = 10.
so n = 10 .
Sounds below 70 dB are considered safe for hearing. This is the sound of a normal conversation between two people. A noise level of 80 or 85 dB will damage your hearing over time. 70 decibels is as loud as a washing machine or dishwasher. Medium noise level. 70 dB of noise is not considered harmful to human hearing.
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what step in the laser printing process is responsible for conditioning the imaging drum in preparation for receiving an electrical charge?
Yes this information is correct about electrical resistance.
What is electrical resistance?Electrical resistance is a force that counteracts the flow of current.
Sol- when two lamps are connected in parallel to a battery, the total electrical resistance that the battery senses is more than the resistance of either . Beacuse In a parallel circuit each bulb is in its own circuit. As bulbs are added the resistance in the circuit decreases since each circuit is another pathway for electrons to move from one end of the circuit to the other.when two lamps are connected in series to a all the battery the electricals resistance that the battery's senses is the more than the resistence of either lamp.
As each bulb is connected in parallel to the battery of the , each has thatbsame potential difference across by to the it as the all of voltage of across the battery of to the terminals. All of other to the potential by differences are zero, as we know all the wires have to the zero resistance.
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The distance between two consecutive crests in a wave train produced in a string is 5 cm. If two complete waves pass through any point per second. The velocity of the wave is15cm^-110cm^-12.5cm^-15cm^-1
The velocity of the wave is 10m/s .
A wave's velocity is determined by multiplying its frequency by its wavelength. The wavelength of a wave is defined as the space between two successive crests or troughs, and the frequency is the reciprocal of the wavelength in time.
We are given that,
The distance between two consecutive wave = λ = 5cm
The no. of waves = n = 2
The velocity of the wave can be calculated by the formula,
ν = nλ
v = 2 × 5 = 10cm/sec
Therefore the velocity of the wave would be 10 m/s .
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a 1,325 kg car rolls from rest down a 10.0 m tall hill. it then moves across a level surface and runs into a spring-loaded
To find maximum spring compression we assume no energy losses due to friction.
Here, the initial and final kinetic energy of the car is zero.
We know that, Total Energy= kinetic energy+ Potential Energy
Since the initial and final kinetic energy of the car is zero, here initial potential energy of the car-spring-earth system completely converts to elastic potential energy.
By the law of conservation of energy,
K1 +U1 = K2 + U2
i.e, (KE+PE, + PE) = (KE + PEg+PES) =
Here KE=0 and Potential energy after reaching ground(PE, = 0) =
0 + mgh + 0 = 0+0+1/2kx- 0
mgh = (1/2kx2) =
2= 2mgh/k
mg = 1325.(9.8) = mg = 1325.(9.8) = 12985N ) = =
We can round off 12985N to 13000N for easy calculation.
-2 2 = 2 * 13000 * 10 1.0 * 106 0.51m
(b) To find the maximum acceleration of the car after contact with the spring,
We apply Newton's 2nd law,
ma= (-kx = )
a = (-kx/n -m)
Multiply the above equation with g/g
a = a= (-kug/mg) = (-kxg/u
a = -(1.0 * 10%) * (0.51) * (9.8)/13000 = -380m/s? = *
a = 380m/s
A level curve is a plane curve where f has a constant value. A plane is a surface in XYZ space where f has a constant value. A level curve or surface is sometimes called a level set. The plane is the equipotential surface of the Earth's gravitational field. It is a curved surface and all its elements are perpendicular to the vertical line.
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A glass has some ice and some liquid water in it. What happens if this glass is heated?.
If this glass is heated ice will turn into water
Explain forms of water.
Ice, water, and gas are all forms of water that can exist (vapour or gas). Ice, a solid, can melt into water with the addition of heat (a liquid). Ice forms when heat is removed from water, a liquid (a solid). We refer to a shift in a substance's state as occurring when liquid water becomes a solid or a gas. The molecules of the water don't change, even when its physical appearance does.
Solid water is what an ice block is. The ice turns into liquid water when heat (an energy source) is introduced. It's melted since it's at 0 degrees Celsius. If you keep heating the water, it will transform into water vapour, which is water that has turned gaseous.
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among irregular galaxies, what makes the large and small magellanic cloud especially useful for astronomers?
Among irregular galaxies, the large and small magellanic cloud are useful for astronomers to study because they are very close to us.
Why are large and small magellanic cloud special?The Milky Way's satellite galaxies are the Large and Small Magellanic Clouds. They are large, misty blobs of light that stand out against the night sky as some of the nearest galaxies to our home galaxy.
According to estimates, there are about 3 billion stars in the Small Magellanic Cloud and 30 billion stars in the Large Magellanic Cloud.
The Large and Small Clouds are thought to have originated between 12 and 13 billion years ago, at around the same time as our Milky Way.
Great galactic tides may have shaped them irregularly due to their repeated interactions with the larger Milky Way galaxy.
What is an irregular galaxy?The shapes of irregular galaxies are amorphous.They are packed with gas and dust and are among of the tiniest galaxies.These galaxies are undergoing intense star formation as a result of their abundance of gas and dust.This may enhance their intelligence.Uneven galaxies include the Large and Small Magellanic Clouds.They are two little galaxies that revolve around the Milky Way Galaxy in our own galaxy.Unusual galaxies make for about 20% of all galaxies.Can learn more about irregular galaxies from: https://brainly.com/question/1241789
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initially, the translational rms speed of a molecule of an ideal gas is 461 m/s. the pressure and volume of this gas are kept constant, while the number of molecules is doubled. what is the final translational rms speed of the molecules
The stated statement states that the molecules' final maximum rate of translation is 270 m/s.
What does physics define as speed?The rate at which the position of an object shifts in any direction. Speed is described as the ratio of the area traveled to the time required to cover that distance. Time is a scalar number since it just has a heading but no magnitude.
Briefing:temperature at the start = T
v = √(3RT/M) = 467 m/s
temperature = T' later
note PV = mRT/M = NRT/NA
so NT = constant,
now N is tripled, T reduces to T' = T/3
so v will change to v' = √(3RT'/M) = v*√(T'/T) =v*√(1/3) = 270 m/s
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What can your employer do to protect you from overhead power lines? select the 3 answer options that apply.
To protect you from overhead power lines:
Keep a safe distance away from lines when working.
Ask the power company to ground and de-energize the electrical lines.
The only way to avoid being electrocuted is to wear PPE.
Have insulated sleeves, commonly referred to as "eels," installed over electricity wires by the utility provider.
What exactly do overhead power wires mean?
To carry electrical energy across long distances, an overhead power line is a structure used in electric power transmission and distribution. For three-phase power, it typically consists of one or more uninsulated electrical cables suspended from towers or poles.
The more precautions taken, the better in order to prevent the employee from being electrocuted by the electricity lines. The safety of the personnel must be ensured by taking all necessary precautions. Particularly when it comes to electrical wiring, problems might arise in a variety of ways.
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Calculate the average time for the tablet to dissolve in
room temperature water. Record the average time in
Table A.
Trial 1
50.00
Trial 2
52.00
Trial 3
51.00
What is the average time it took for the tablet to dissolve
in room temperature water?
seconds
In water that was 22 °C in temperature, a tablet took an average of 28.3 seconds to dissolve.
What is a drug?Drugs are any chemicals that have an impact on how living creatures and the microbes that infect them (such as bacteria, fungi, and viruses) operate. The study of pharmaceuticals, or pharmacology, covers all facets of a drug's use in medicine, such as its mechanism of effect, physical & chemical characteristics, metabolism, treatments, and toxicity.
A drug is any substance that, when eaten, affects an organism's physiology or psychology. Foods and other items that aid in nourishment are typically kept apart from medications. Drugs can be ingested orally, smoked, injected, inhaled, applied topically with a patch and suppository, or broken down sublingually.
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Answer:
51 seconded
Explanation:
if the root-mean-square speed of the gas molecules is 162 m/s , what is the pressure of the gas? express your answer in pascals.
The force that the gas applies to the container boundaries is known as the gas's pressure. Along the given volume, the gas molecules move at random.
Explain about the pressure of the gas?They bump into the ground and each other as they move. The pressure of a gas is therefore a measurement of the average linear momentum of the moving molecules in a gas because the impact of each individual gas molecule is too minute and challenging to observe. The pressure exerted on the wall is normal to it and acts perpendicularly; the gas's viscosity affects the force's tangential (shear) component.
The quantity of gas particles, the capacity of the container, and the temperature of the gas all affect how much pressure is applied to a contained gas. The pressure will rise as the volume of gas particles in a container increases. The pressure will rise as a container's volume increases.
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(a) is positive or negative work done by a constant force f with arrow on a particle during a straight-line displacement d with arrow if the angle between f with arrow and d with arrow is 27°?
The work done by a constant force f with arrow on a particle during a straight-line displacement d with arrow if the angle between f with arrow and d with arrow is 27° is positive.
Paintings done are elaborated in one way it consists of both forces exerted on the frame and the whole displacement of the frame. This block is preceded via a steady pressure F. The cause of this force is to move the frame a sure distance d in a direct route in the direction of the force.
To express this concept mathematically, the paintings W is identical to the pressure f times the gap d, or W = fd. If the force is being exerted at an attitude θ to the displacement, the paintings completed is W = FD cos θ.
The paintings accomplished through pressure are described to be the product of thing of the pressure inside the route of the displacement and the value of this displacement. formula. work can be calculated with the aid of multiplying force and Distance in the route of pressure as follows. W = F × d.
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Nuclear decay occurs according to first-order kinetics. What is the rate constant for radon-220, which has a half-life of 55. 6 seconds?.
The rate constant for radon-220, which has a half-life of 55. 6 seconds is 0.012.
We know that half life of first order reaction is : [tex]t_{1/2} = 0.693/k[/tex]
where k = rate of reaction.
Given half life = 55.6 sec
Putting this value in above equation we get k = 0.012
i.e. The rate constant for radon-220, which has a half-life of 55. 6 seconds is 0.012.
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A monatomic ideal gas is compressed at a constant pressure of 0.293 atm from a volume of 7.43 L to 3.32 L. In the process, heat energy flows out of the gas.
(a) What is the work done on the gas? Answer needs to be in J ( ± 2 J)
(b) What is the change in its internal energy? Answer needs to be in J ( ± 2 J)
The work done on the gas is 2.73 Joules and the change in internal energy of the system is -2.73 Joules.
The monoatomic gas is taken from 7.43L to 3.32L at a constant pressure of 0.293 atm.
(a) The work done for monoatomic gas is,
W = PΔV/(1-y)
P is pressure, V is volume and y is adiabatic constant which is 1.66 for monoatomic gas.
Putting values,
W = 0.293(3.32-7.73)/-0.44
W = 2.73 Joules.
So, the work done in this process is 2.73 Joules.
(b) In this process the change in internal energy is negative to the work done so, Change in internal energy of the system is -2.73 Joules.
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a suspension bridge oscillates with an effective force constant of 1.1 × 108 n/m.show answer no attempt 50% part (a) how much energy, in joules, is needed to make it oscillate with an amplitude of 0.095 m?
4.5 * 10⁷ J energy, in joules, is needed to make it oscillate with an amplitude of 0.095 m.
What is it Electrical amplitude?The highest payout of a current or voltage is its amplitude. Either of the diffraction signals of the sine wave can be used to symbolize it. The peak voltage is another name for this voltage level, which might be positive or negative. Positive and negative only describe the flow of current in one direction.
Briefing:From the periodic motion we know that the energy of the system :
E = 1/2 kA²
E is the system's energy reserve.
The spring's amplitude is denoted by A.
The spring constant is k.
A = 0.95 m
k = 1.1 × 10⁸
Putting in known data to obtain
E = 1/2 k A²
E = 1/ 2 * 100 * 10⁸ * 0.95²
E = 4.5 * 10⁷ J
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a projectile is thrown upward with speed v by the time its speed has decreased to 3v/4 it has risen a height h what is the maximum height reached by the projectile if it is projected at an angle of 60 with the horizontal
The maximum height attained by the projectile in terms of h is 12h/7.
What is the maximum height reached by the projectile?
The maximum height attained by the projectile is calculated by applying the following formula as shown below.
H = v² sin²θ / 2g
where;
v is the initial speed of the baseballg is the acceleration due to gravityθ is the angle of projection of the ballH = ( v² ( sin 60 )² ) / 2g
H = ( v² x ³/₄ ) /2g
H = 3v² / 8g
To solve for the maximum height attained by the projectile in terms of h is calculated as follows;
vf² = vi² - 2gh
2gh = vi² - vf²
h = (vi² - vf²) /2g
where;
vi is the initial velocity of the projectile = vvf is the final velocity of the projectile = 3v/4g is acceleration due to gravityh = (v² - (3v/4)²) / 2g
h = (v² - 9v²/16) / 2g
h = (7v²/16) / 2g
h = 7v² / 32g
7v² = 32gh
v² = 32gh/7
The maximum height becomes;
H = 3v² / 8g
H = 3(32gh / 7) / 8g
H = (3 x 32 gh) / (7 x 8g)
H = 12 h / 7
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What best describes the greatest height a ball will bounce off the ground after being dropped from a height of 60 centimeters?
Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy
Less than 60 centimeters, as the ball transforms some of its heat energy into potential energy
More than 60 centimeters, as the ball transforms some of its heat energy into potential energy
More than 60 centimeters, as the ball transforms some of its potential energy into heat energy
The statement that best describes the after effect of the ball is that the ball would be Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy. That is option A.
What is law of conservation of energy?The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.
There are various types of energy which include the he following:
chemical energy, mechanical energy, nuclear energy, gravitational energy, light energy, radiant energy, sound energy, motion energy,heat energy, and electrical energy.Potential energy is defined as the type of energy that is found in the body that is at rest. Therefore when the ball is dropped from a height, it would bounce with less than 60 centimetres as the potential energy is transformed to heat energy.
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two particles of mass m and 3m are moving with the same speed v in a vacuum at right angles with the particle of mass m moving in the x-direction and the particle of mass 3m moving in the negative y-direction. a
The kinetic energy of the two particles will be equal if they are travelling at the same speed in a vacuum. The equation: gives the particle's kinetic energy.
KE = (1/2)mv^2
m is the particle's mass, v is its speed, and KE is its kinetic energy.
In this instance, the particle with mass m will have the following kinetic energy:
KE = (1/2)m*v^2
And the kinetic energy of the particle with mass 3m will be:
KE = (1/2)3mv^2
= (3/2)mv^2
The two equations may be made to equal one another and we can solve for v because the particles have the same kinetic energy.
(1/2)mv^2 = (3/2)mv^2
(1/2)*v^2 = (3/2)*v^2
1/2 = 3/2
Since there is no solution to this equation, two particles travelling in a vacuum cannot be moving at the same speed if one of them has a mass.
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