Similarity which leads about most of the object to let the bulb light is their conducting materials.
The behaviour (ie., brightness) of the bulb when objects made out of various materials are inserted into the circuit is as-
The bulb glows when connected to conducting object but it does not glow when some objects like eraser, wood, plastic etc. are used to complete the circuit as it is the non-conducting objects.
Paper is a non-conducting object.
Coins are normally made up of silver, gold and metal alloys and we know all metals conduct electricity.
Pencil lead is made up of graphite which is non-metal still it conducts electricity as graphite contains delocalised electron (free electrons). These electrons can move through the graphite, carrying charge from place to place and allowing graphite to conduct electricity.
Human fingers are conductors as whole body of a human is an excellent conductor of electricity. This reply on the fact that our fingers is 3 parts salty water - which means it's got lots of loose electric charges floating around in it.
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A proton and an electron are placed in an electric field. Which undergoes the lesser acceleration?.
Proton will undergoes the lesser acceleration
What happens when Electron and proton are kept in Electric field ?Due to the opposite polarity of an electron and a proton, when they are in an electric field, they are attracted to one another by an electrical force of equal strength. However, because of their opposing charges, the force's direction will be the opposite.
An electron will accelerate more quickly than a proton because of the difference in mass between the two particles.
Thus, the electric forces acting on them will be equal in strength but directed in the opposite direction. Since the mass of the proton is 1836 times greater than the mass of the electron, its acceleration will be [1/1836] times greater.
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the current in a certain ac circuit is independent of the frequency at a given voltage. which combination of elements is most likely to comprise the circuit?
A capacitor and a resistor in series. This is known as a low-pass filter, and it attenuates higher frequencies more than lower frequencies, so at a given voltage the current will not depend on the frequency.
What is frequency?
In physics, frequency is the amount of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time. After moving through a series of situations or positions and then returning to its initial position, a body in periodic motion is thought to have experienced one cycle or one vibration. See also simple harmonic motion and angular velocity.
The frequency is 2 per second if the period, or time interval, needed to complete one cycle as well as vibration is 1/2 second; it is 100 per hour if the period is 1/100 of an hour. In most cases, the frequency is equal to the period, or time interval, reciprocally, so frequency = 1/period = 1. (time interval).
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a rope of mass m and length ` hangs from the ceiling. (i) what is the wave speed on the rope a distance y above the lower end?
From a ceiling, a rope with the mass m and length L hangs. Demonstrate that v =√gy is the wave speed on the rope at a distance of y above the lower end.
Explain about the wave speed?The amount of space a wave covers in a certain amount of time, such as the number of meters it covers in a second, is known as its wave speed. Speed = Wavelength x Frequency is an equation that describes how wave speed relates to wave wavelength and wave frequency. When the wavelength and frequency are known, this equation can be used to determine the wave speed. Wave frequency (f) is recorded in hertz, while wave speed (v) is measured in meters per second (m/s) (Hz)
Although technically, velocity means both speed and direction, wave velocity is most often used to refer to speed. A wave's velocity is independent of its intensity and equal to the product of its wavelength and frequency (number of vibrations per second).
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a student performs three trials of a standard two-slit interference experiment. in each trial the material and hence the index of refraction in the region between the barrier and the screen is
Between the barrier and the screen in each trial, the material and consequently the index of refraction are 487.8 nm.
Light waves alter in speed when two materials with different densities, like air and glass, come into contact. The resulting change in direction is referred to as refraction.
With D=2.05, d=5,
m=1,Y1=20cm
In our case, d sin = m.
λ=dYn/mD=
5*10⁻⁶*20*10⁻²/1*2.05
λ=487.8 nm
Refraction in physics is the change in direction that results from a wave's change in speed when it travels through one medium and enters another. For instance, waves move faster in deep water than they do in shallow water.
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In comparing two unequal forces on a rigid body, is it possible to have the larger force produce less torque than the smaller force?.
Yes It is conceivable for a force to produce less torque when it is greater than a force that is smaller.
What occurs when there are unequal forces?An object's motion can be altered by unbalanced forces.Two things cause this.An object will move if an imbalanced force pushes and pulls on it while it is at rest.Unbalanced forces also can cause an item in motion to shift its speed or direction.
What impact do uneven forces have on motion?Students are aware that unbalanced forces can cause objects to accelerate, decelerate, or change direction during their motion.
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Nuclear decay occurs according to first-order kinetics. How long will it take for a sample of chromium-51 to decay from 35. 0 grams to 10. 0 grams? the half-life of chromium-51 is 28 days.
50 dayss long will it take for a sample of chromium-51 to decay from 35. 0 grams to 10. 0 grams
What purpose does chromium-51 serve?Observationally stable chromium isotopes include chromium Cr-51.
It is utilized as a diagnostic radiopharmaceutical agent when injected intravenously to calculate the volume or mass of red blood cells, research red blood cell survival, and assess blood loss.
what The half-life of chromium-51 is what?Introduction.With a half-life of 27.7 days and gamma rays with a maximum energy of 0.320 MeV, chromium-51 is a widely utilized radionuclide
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Determine the output voltage Vo in the circuit given below using nodal analysis, where the dependent source A-0.2Vo Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees. j2Ω 12/0°V 4Ω The output voltage of the circuit is V.-n/r n/r
It is given that:
dependent source = A-0.2Vo
The Carnot cycle is calculated using this law or modifications of it, and Daniel Bernoulli derived it with Newton's laws of motion. Independently discovered by Edme Mariotte, credit for it is most often given to the author of (*) The Skeptical Chymist. It is part of the combined gas law, with Gay-Lussac's Law and Charles' Law. For 10 points, identify this law that states that at a fixed temperature, pressure and volume of a gas are inversely proportional.
Boyle's law states that the volume of a given quantity of gas sustained at a fixed temperature is inversely proportional to the measurement's measurement of pressure.
Describe Newton's law.The motion of an item is related to the forces operating on it by Newton's equations of motion. According to the first law, until a force strikes on an item, it will not alter its motion. According to the second law, an object's force is determined by multiplying its mass by its acceleration. According to the third law, when two objects interact, they exert equal-sized and opposite-direction pressures upon one another.
Bernoulli equation: what is it?Static pressure plus dynamic pressure equals total pressure is a simple way to express Bernoulli's equation. Each point Every point in a steadily flowing fluid, regardless of the fluid speed at that point, has its own unique static pressure p and dynamic pressure q.
What is Gay-Lussac's Law and Charles' Law?Joseph-Louis Gay-Lussac investigated the expansion of gases as the temperature is increased. His data helped establishCharles' law, which says, in its modern form, that the volume of a gas is directly proportional to the absolute temperature.
Now we need to say which law is there which state that at a fixed temperature, pressure and volume of a gas are inversely proportional.
The law that states this is Boyle's law.
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two vectors vector a and vector b, each located in a different position in the plane, have equal magnitude and the same direction. what can be said about the relationship of vector a and vector b? (select all that apply.)
Two vectors vector a and vector b, each located in a different position in the plane, have equal magnitude and the same direction, both vectors are considered to be parallel to each other.
Two vectors are said to be parallel if and as it were in case the angle between them is degrees. Parallel vectors are too known as collinear vectors, that is two parallel vectors will be continuously parallel to the same line but they can be either within the same direction or within the exact inverse direction. The cross product of any two parallel vectors could be a zero vector. For any two parallel vectors a and b, their dot product is equal to the product of their magnitudes.
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what range of spring constant values will cause the motion of the system to have damped oscillation?
The system's behavior becomes more elastic when the spring constant, k, is increased, as is the Q factor
How might one raise the spring constant?Since a spring's constant k and its length are inversely related, when a spring is divided into n parts, the length increases by 1n, making the spring constant k/(1/n)=nk.
How do mass and the spring constant relate?The square root of the mass and the spring constant have opposite relationships with respect to the period of a spring-mass system.
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In comparing two unequal forces on a rigid body, is it possible to have the larger force produce less torque than the smaller force?.
Yes, it is possible to have the larger force produce less torque than the smaller force. It is possible for the larger force to be applied closely enough to the center of mass of the rigid body due to which its resulting torque is smaller than that of a smaller force applied at a point far from the center of mass.
What is force?Force is an external cause due to which a body tends to modify or change its state. Due to application of force, the body can also change its size, shape, and direction. Force has both direction and magnitude.
Force = mass × acceleration
What is torque?The force that can cause an object to rotate along an axis is measured as torque.
[tex]\tau = rF\sin\theta[/tex]
Here, [tex]\tau \\[/tex] = Torque
r = radius
F = force
[tex]\theta[/tex] = the angle between the F and the lever arm
In the given question, lets assume the following,
F = Large force
d = Distance from the point of application of the large force to center of mass
f = Small force
D = Distance from the point of application the of small force to center of mass
Now,
Assuming D > d (i.e, D is greater than d).
The torque caused by the large force is Fd, and the torque caused by the little force is fD if the forces are applied perpendicular to the body's axis. Hence, depending on the values of F, f, D, and d, we can have Fd < fD.
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two light bulbs are 1.10 m apart. from what distance can these light bulbs be marginally resolved by a small telescope with a 4.00 cm -diameter objective lens? you may want to review (pages 1011 - 1014) .
The two light bulbs are to be resolved at a distance of 60.1 km.
The formula of Rayleigh criterion for the diffraction limit is
[tex]\theta \:=\: 1.22 \: \frac{\lambda}{D}[/tex]
where
λ = the radiation wavelength (m)D = the diameter of lens (m) = 4.00 cm 4.00 × 10⁻² mθ = limited angle (rad)Because in problems didn't give the detail about the wavelength, for visible light the radiation wavelength is 750 nm - 400 nm. In this problems I assume λ = 600 nm = 600 × 10⁻⁹ m = 6 × 10⁻⁷ m
[tex]\theta \:=\: 1.22 \: \frac{\lambda}{D}[/tex]
θ D = 1.22 λ
θ × 4.00 × 10⁻² = 1.22 × 6 × 10⁻⁷
θ = (7.32 × 10⁻⁷) ÷ (4.00 × 10⁻²)
θ = 1.83 × 10⁻⁵ rad
The angle for the light bulbs
[tex]\theta = \frac{s}{r}[/tex]
where
s = the width between two light bulbs (m)r = the distance light bulbs are resolved (m)s = θr
r = 1.1 ÷ (1.83 × 10⁻⁵)
r = 6.01 × 10⁴ m
r = 60.1 km
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a ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). the initial velocity is 40 i 80 k, with speed measured in feet per second. the spin of the ball results in a southward acceleration of 8 ft/s2, so the acceleration vector is a
The ball falls to the ground with a magnitude of 244.8 feet and a speed of 91.0 feet per second.
What is kinetics?In this situation, we have a three-dimensional problem that kinematics can help us solve by determining the position, velocity, and acceleration of the body.
The vector, which is the ball's position in the air at time t,
p(t) = (60 i + 64 k) t + 1/2 (-6 j - 32 k) t ²
and its velocity is given by
v(t) = (60 i + 64 k) + (-6 j - 32 k) t
The time the ball is in the air is equal to the time it takes for the position vector's vertical (k) component to reach zero, so we solve,
64 t - 32/2 t ² = 0 ==> t = 0 OR t = 4
and so the ball is in the air for 4 s.
The ball has position vector.
p(4) = (60 i + 64 k) t + 1/2 (-6 j - 32 k) t ² = 240 i - 48 j
which has magnitude.
||p(4)|| = √(240² + (-48)²) = 48 √26 ≈ 244.8 ft
in the direction of the positive x axis in the x, y plane so that
tanθ = -48/240 = -1/5 ==> θ = -arctan(1/5) ≈ -11.3º
or 11.3º South of East.
The ball swiftly strikes the ground.
||v(4)|| = ||60 i - 24 j - 64 k|| = √(60² + (-24)² + (-64)²) = 4 √517 ≈ 91.0 ft/s.
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At a hydroelectric power plant, water is directed at high speed against turbine blades on an axle that turns an electric generator. For maximum power generation, should the turbine be designed so that the water is brought to a dead stop, or so that the water rebounds? If only an external force can change the momentum of the center of mass of an object, how can the internal force of the engine accelerate a car?
Ideally, the water bounces off the turbine blades, maximizing electricity era. when water splashes, momentum changes extra than while you are simply status.
Also, if the change in momentum of the water is greater than the alternate in momentum of the blade, the blade will spin faster. Consistent with the laws of movement, the momentum of the center of gravity of an object can most effective be changed by the movement of an external force.
But, because of the frictional force generated while the tires contact the ground, the internal force of the engine is added, allowing the automobile to accelerate.
Hydro turbines convert the strength of flowing water into mechanical energy. A hydroelectric generator converts this mechanical power into energy. A high stress water jet is pressed towards the turbine blades. The route of flow modifications. The ensuing change in momentum exerts a force on the turbine blades, inflicting the turbine to rotate.
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an electrician is running wire from the electric box on a house to a utility pole 75 feet away, the angle of elevation to the connection on the pole is . how much wire does the electrician need?
Answer: The electrician need78 feet of wire are required by the electrician as a result.
Reason:
The elevated angle between the horizontal plane and line of sight to the connection on the pole.
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The reason padded dashboards are used in cars is that they _____.
a. change the impulse in a collision
b. increase the time it takes the person to come to a complete stop
c. change the momentum of a collision
d. increase the force on the person as they come to a final stop
The reason padded dashboards are used in cars is that they a.) change the impulse in a collision. Therefore option a) is correct.
Why are padded dashboards used in cars?Padded dashboards make automobiles safer as they increase the time taken to decrease the momentum of impacting body to zero, which also decreases the impact. Therefore, force acting on the padded dashboards is small.
If the driver or passenger hits the dashboard, then the force and time required to stop the momentum is exerted by the dashboard. Padded dashboards serve to extend the time duration of the impact, hence minimizing the effect of the force.
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Consider a proton, an electron, and a helium nucleus (alpha particle) moving at the same speed vv. List their de broglie wavelengths from largest to smallest.
The sequence for de broglie wavelengths from largest to smallest is electron > proton > helium.
de broglie wavelength is an important concept to study various phenomenon in quantum mechanics.
Mathematically, de broglie wavelength equation is λ = h/p (p=mv)Where, h is the Plank's constant
m is the mass of the particle
v is the velocity of particle.
mass of proton = mp = 1.6 x [tex]10^{-27}[/tex] kg
mass of electron, me = 9.1 x [tex]10^{-31}[/tex] kg
mass of helium nucleus, mHe = 6.6 x [tex]10^{-27}[/tex] kg
As the velocity of all the three elements are same as v.
According to the de Broglie wavelength formula, since v is same for all λ is inversely proportional to the mass of the element.
Lesser the mass more will be the de broglie wavelength.
Here, mass of electron < mass of proton < mass of helium nucleus.
So, de broglie wavelength of electron > de broglie wavelength of proton > de broglie wavelength of helium nucleus.
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Question 1 options:
60 miles
1 mile
60 miles per hour
Trick question. You can't go 60 miles if an hour has 60 minutes
Answer:
Explanation:
You can drive at 60 miles per hour
D = 60 miles
t = 1 hour
Speed:
V = D / t = 60 / 1 = 60 mph
how much time in seconds will it take a cart to reach the bottom of the track?assume the cart starts from rest, the track is 1.5 m long and the distance covered by the cart is 1.5 m.
Around 80 times we should expect it to land on B.
What is time?Time is basically a measure of non-stop, consistent change in our own surroundings. Usually we can see through a specific point of view. Concept of time is self-evident and intuitive. Describing the fundamental nature of time is quite difficult.
The general time formula of the any kind of task that is given as [Time = Distance ÷ Speed]. for SI unit of time is seconds (s).
As per the given condition-
Spin circle=3
Time = 120 sec
the total is 3
the red and orange equals to 2
2/3 times 120
240/3
=80 times
Thus, the correct answer is 80 times.
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6. A 1400 kg car is also traveling in a straight line. Its momentum is equal to that *
of the truck in the previous question. What is the velocity of the car? ROUND TO
THE NEAREST HUNDREDTHS (2 DECIMAL PLACES)
Answer:
V = 2.86 m/s
Explanation:
Given:
m = 1400 kg
p = 4000 kg·m/s
_________________
V- ?
Momentum:
p = m·V
Velocity:
V = p / m
V = 4000 / 1400 ≈ 2.86 m/s
xa student fires a cannonball diagonally with an initial speed of 35.0m/s. neglect drag and the initial height of the cannonball. what is the max height
2.23 seconds is the cannons' total flight time.
What is Acceleration due to gravity ?
The acceleration an object experiences as a result of gravitational force is known as acceleration due to gravity. M/[tex]s^{2}[/tex] is its SI unit. Both magnitude and direction are present.
According to the information
A diagonal ball is launched at a 45° angle from the horizontal. The ball is being fired in a projectile motion. A projectile is a motion in which a body that has been discharged into space with a velocity U is allowed to fall freely while being affected by gravity.
The cannon ball's total flight time, T, can be represented as;
where T = 2Usin(theta)/g;
U is the ball's starting speed, which is 35 m/s.
The angle the ball makes with the horizontal is theta, which is equal to 45°.
The acceleration caused by gravity is g = 9.81 m/[tex]s^{2}[/tex]
Incorporating the provided data into the existing formula;
T = 35sin45°/9.81
T = 35×0.7071/9.81
T = 24.74/9.81
2.52 seconds later
2.23 seconds is the cannons' total flight time.
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which of the following statement(s) is/are correct? i) the energy change, , when ( 15.99491461956 amu) is formed from 8 protons and 8 neutrons is less than zero.ii) nuclear fission is used to produce electric power in nuclear reactorsiii) the first example of nuclear fission involved bombarding with nuclei.
The statement that is true is that; nuclear fission is used to produce electric power in nuclear reactors.
What is a fission reaction?We know that a fission reaction has to do with a kind of reaction in which a radioactive nucleus is bombarded by the use of a particle and then there is the disintegration of the atomic nucleus in order to produce energy.
This has been one of the ways by which we can be able to generate electricity in several power plants across the world. The loss in the mass of the reactants is the equivalent of the energy produced.
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During a tug-of-war, team a pulls on team b by applying a force of 1100 n to the rope between them. The rope remains parallel to the ground. How much work does team a do if they pull team b toward them a distance of 2. 0 m?.
Work done by team A while pulling team B is 2200 J.
What is work done?
The work done by a force is defined to be the product of the component of the force in the direction of the displacement and the magnitude of this displacement. Formula. Work can be calculated by multiplying Force and Distance in the direction of force as follows. W = F × d.
What is cos theta in work done?
Work done in physics is defined as a dot product of a force vector and displacement vector. W = F.S.cos θ where cos θ is the angle between the force vector and displacement vector.
What force is applied during tug of war?
Tug-of-war is a game that uses friction as the driving force.
What happens in a tug of war if both teams apply equal force?
In a tug of war, if the two teams are applying equal force on the rope then the net force acting on the rope is zero and hence the rope stays at the same place.
Force F= 1100 N
Displacement caused by the applied force S = 2 m
Force and displacement are in the same direction the angle between them is zero.
Work done is calculated as
[tex]W=F * S * cos theta\\W=1100 * 2 * cos 0\\W=2200 J[/tex]
Thus, the work done by team A to pull is 2200J.
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A force of 203 N is exerted on 8.11 -kg bowling ball over time span of 0.784 seconds
The change in momentum of the bowling ball of mass 8.11 kg is 159.152 kgm/s.
What is change in momentum?The change in the momentum is equal to the product of the mass and the change in the velocity.
To calculate the change in momentum of the bowling ball, we use the formula below.
Formula:
ΔM = Ft............ Equation 1Where:
ΔM = Change in momentumF = Force applied to the bowling ballt = TimeFrom the question,
Given:
F = 203 Nt = 0.784 sSubstitute these values into equation 1
ΔM = 203×0.784ΔM = 159.152 kgm/sHence, the change in momentum of the ball is 159.152 kgm/s.
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Complete question: A force of 203 N is exerted on 8.11 -kg bowling ball over time span of 0.784 seconds. Calculate the change in momentum of the bowling ball
which type of galaxy is very difficult to see, but (astronomers recently realized) may be very common?
A dwarf ellipse. Despite being incredibly difficult to view, astronomers recently realised that this form of galaxy may be quite common.
What is a galaxy?
A galaxy is a vast collection of stars, solar systems, gas, and dust. Gravity holds a galaxy together. There is also a black hole at the centre of our galaxy milkyway.
Dwarf On a smaller scale, elliptical galaxies seem to share many of the same global characteristics as typical elliptical galaxies. They lack recent star formation, are elliptical in shape, and have very little to no gas. The most prevalent type of galaxy in the cosmos is a dwarf galaxy, but because of their small size, low mass, and low luminosity, they are hard to find.
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what speed (as a ratio with respect to the speed of light) must a canister be shot from one ship towards the other ship in order for the canister to approach the other ship at 0.999c as seen by the other ship?
The speed of the canister relative to the ship firing it must be 0.999c since the speed of light is the same in all inertial reference frames.
Relative velocity is the vector difference between the velocities of two objects in motion relative to each other. It is the velocity of an object in relation to the velocity of the other object. Since the speed of the canister must be 0.999c relative to the ship firing it, the speed of the canister relative to the other ship must be 0.999c + (the relative velocity of the two ships).
So, if the relative velocity of the two ships is v, the speed of the canister relative to the other ship must be 0.999c + v.
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3. a resistor r is connected to a 12 v ideal battery. the total current increases five times when a 400 ohm resistor is added in parallel with it. the value of resistance r is:
The value of resistance r is 100ohm
Define resistance.
The opposition a substance provides to the flow of electrical current is referred to as resistance. The capital letter R is used to symbolize it. The ohm, which can be written as a word or represented by the Greek letter omega Ω in uppercase, is the universal unit of resistance.
Because the output current of the first resistor flows into the input of the second resistor in a series circuit, the current through each resistor is equal. All of the resistor leads on one side of the resistors are connected together, as are all of the leads on the other side, in a parallel circuit.
In a parallell circuit,
1/R = 1/R1 + 1/R2
Given R1= r
R2= 400
I= 5
V= 12V
1 / R + 1 / 400 = 5 / R
1 / 400 = 4 / R
R = 400/4
R= 100ohm
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a figure skater is rotating with her arms stretched out away from her body. as she pulls her arms in towards her body, what happens to her angular velocity?
She draws her arms close to her body, decreasing her moment of inertia, to quicken the rotational velocity of her spin. Due to the conservation of angular momentum, rotational velocity will increase,
What are Rotational Velocity ?The angular velocity (w), a vector quantity in uniform circular motion, is determined by dividing the angular displacement (ΔФ a vector quantity), also a vector quantity, by the change in time (t). Speed is equal to the arc length travelled (S) divided by the change in time (Δ), which is also equal to ||R.
According to the above given information
We got to know that
She draws her arms close to her body, decreasing her moment of inertia, to quicken the rotational velocity of her spin. Due to the conservation of angular momentum, rotational velocity will increase.
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three capacitors of values of 1.0 μf, 1.5 μf, and 2.0 μf each are connected in series. what is the equivalent capacitance?
If three capacitors with values of each are connected in series, the corresponding capacitance is 46 mF 1 / (1/1.)+(1/1.5)+(1/2.).
What is a capacitor used for?An electrical energy storage device is a capacitor. It has two conductors in it that appear to be close to one another but are kept apart. A straightforward example of a particular storage device is the parallel-plate capacitor.Equivalent Capacitance for three capacitors in series can be given by the following equation. 1/C = 1/C1 + 1/C2 + 1/C3.
What are capacitors' two most frequent applications?Capacitors are most frequently used for signal coupling and decoupling, power conditioning, electronic noise filtering, energy storage, and remote sensing. Capacitors are employed in many different industries since they have a crucial and adaptable role for a variety of applications.
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Circle the contact forces from the list:
Magnetism
Air resistance
Weight
Upthrust
Reaction