Answer:
(4) 8.5 m/s
Explanation:
You add both the meters together and both the seconds together and then divide them both.
Answer:
(4) 8.5 m/s
Explanation:
Total distance = 35 + 50 = 85m
Total time = 4 + 6 = 10sec
average speed = total distance/ total time
ave. speed = 85/10 = 8.5 m/s
A scientist recorded the number of geese found in a park on various days of the week. The data are shown below. 22, 25, 29, 21, 33, 28, 28 What is the range of these data? O A. 33 O B. 7 O C. 21 O D. 12
Answer: it's 12
Explanation:
Range is the difference between the highest and lowest numbers.
33-21=12
In space, are fires possible without oxygen? If so how would it happen?
Answer:
no
Explanation:
it just doesn't work that way, try to search the fire pyramid on G. O. O. G. L. E. and you'll see why
[A] Write an expression for the equivalent resistance of three resistors connected in parallel.[ no derivation needed]
[B] In the circuit diagram given along-side, find:
[i] Total resistance of the circuit.
[ii] Total current flowing in the circuit.
[iii] The potential difference across R1
Answer:
1) R1 + ((R2 × R3)/(R2 + R3))
2) 0.5 A
3) 3.6 V
Explanation:
1) We can see that resistors R2 and R3 are in parallel.
Formula for sum of parallel resistors; 1/Rt = 1/R2 + 1/R3
Making Rt the subject gives;
Rt = (R2 × R3)/(R2 + R3)
Now, Resistor R1 is in series with this sum of R2 and R3. Thus;
Total resistance of circuit = R1 + ((R2 × R3)/(R2 + R3))
2) R_total = R1 + ((R2 × R3)/(R2 + R3))
We are given;
R1 = 7.2 Ω
R2 = 8 Ω
R3 = 12 Ω
R_total = 7.2 + ((8 × 12)/(8 + 12))
R_total = 7.2 + 4.8
R_total = 12 Ω
Formula for current is;
I = V/R
I = 6/12
I = 0.5 A
3) since current through the circuit is 0.5 and R1 is 7.2 Ω.
Thus, potential difference through R1 is;
V = IR = 0.5 × 7.2 = 3.6 V
Part D
From this data, how many male, female, adult, and baby mountain goats do you predict are in the park?
Answer:
80
Explanation:
I literally just did this question lol I hope I helped
In an ecosystem having a park, from the given data there are 71 male,93 female, 103 adults and 61 baby goats in the park.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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2. A 260 kg piano is pulled up a frictionless 13 m plank to get it through French doors that are located 5.0 m above
the ground.
a.
How much GPE (relative to the ground) does the piano have when it is inside the French doors?
b.
How much force is needed?
c.
How much force would be necessary to slowly lift the piano straight up?
Answer:
Explanation:
a. GPE = mgh which is mass times gravity times height. For us, this is
GPE = 260(9.8)(5.0) so
GPE = 13000 J rounded to 2 sig fig's
b. is a little bit more involved, since we are on an incline. The formula for this is usually
[tex]wsin\theta-f=ma[/tex] where f is the pull of friction on the object. But we have no friction here, so f = 0. That means that we need to find the angle of inclination using right triangle trig. We have the height as 5.0 m and we have the length of the ramp as 13 m, so we an find the angle using the inverse sin button on our calculator.
[tex]sin\theta=\frac{5.0}{13}[/tex] so
[tex]\theta=23[/tex] degrees, rounded to 2 sig fig's as needed.
The formula to find Force is F = ma, which means we need the acceleration found in the equation
[tex]wsin\theta=ma[/tex]. Filling in:
weight = 9.8(260) = 2500 N so
2500sin23 = 260a and
a = 3.8 m/sec². Now we can find force:
F = 260(3.8) so
F = 990N
c. To life the piano straight up, we just need to overcome the pull of gravity along with the mass of the piano and the angle at which it is sitting. That has a formula of
Normal force = weight = wcosθ so
Normal force = 2500cos23 and
Normal force = 2300N
State the difference between viscosity and friction
Answer:
The main difference between friction and viscosity is that friction is used to refer to forces that resist relative motion, in general, whereas viscosity refers specifically to resistive forces that occur between layers of a fluid when fluids attempt to flow.
Explanation:
Answer:
Viscosity
Viscosity is defined as a measure of the resistance of a fluid, which is being deformed by either shear stress or tensile stress. In more common words, viscosity is the “internal friction” of a fluid. It’s also referred as the thickness of a fluid. Viscosity is simply the friction between two layers of a fluid when the two layers move relative to each other. Sir Isaac Newton was a pioneer in fluid mechanics. He postulated that, for a Newtonian fluid, the shear stress between layers is proportional to the velocity gradient in the direction perpendicular to the layers. The proportional constant (proportionality factor) used here is the viscosity of the fluid. The viscosity is usually denoted by the Greek letter “µ”. Viscosity of a fluid can be measured using Viscometers and Rheometers. The units of viscosity are Pascal-seconds (or Nm-2s). The cgs system uses the unit “poise”, named after Jean Louis Marie Poiseuille, to measure viscosity. Viscosity of a fluid can also be measured by several experiments. The viscosity of a fluid depends on the temperature. The viscosity decreases as the temperature is increased.
τ = μ (∂u / ∂y)
Viscosity equations and models are very complex for non-Newtonian fluids. It can be clearly seen that viscosity always acts in a direction, to oppose the flow of the liquid. Viscous forces are distributed throughout the volume of the liquid in a given dynamic condition.
Friction
Friction is probably the most common resistive force we experience every day. Friction is caused by the contact of two rough surfaces. Friction has five modes; dry friction that occurs between two solid bodies, fluid friction, which is also known as viscosity, lubricated friction, where two solids are separated by a liquid layer, skin friction, which opposes a moving solid in a liquid, and internal friction that causes the internal components of a solid to make friction. However, the term “friction” is most commonly used in place of dry friction. This is caused by the rough microscopic cavities on each of the surfaces fitting each other and refusing to move. The dry friction between two surfaces depends on the friction coefficient and the reactive force normal to the plane acting on the object. The maximum static friction between two surfaces is just a bit higher than the dynamic friction.
Explanation:
PLS MARK ME BRAINLIEST
Determine the mechanical advantage of a car jack that uses an input force of 30 N and provides an output force of 600 N. pls answer quick
Answer:
Mechanical Advantage of car jack is 20
A pair of oppositely charged plates is separated by 0.09 m. A potential difference of
285 V exists between the plates. What is the electric field that exists between the plates?
Answer:
25.65 V/m
Explanation:
Applying,
V = Er................. Equation 1
Where V = Electric potential, E = electric field, r = distance of seperation.
make E the subject of the equation
E = V/r.............. Equation 2
From the question,
Given: V = 285 V, r = 0.09 m
Substitute these values into equation 2
E = (285×0.09)
E = 25.65 V/m
Hence the electric field between the plates is 25.65 V/m
O aparelho de som do carro de João dissipa uma potência de 150W quando ligado em volume máximo. Sabendo que a bateria de seu carro fornece uma diferença de potencial de 12V, calcule a corrente máxima nesse circuito, quando esse aparelho está ligado em volume máximo e a resistência elétrica.
Answer:
i not sure
Explanation:
Jeremy is pushing his two children on a set of swings. He gives his daughter a push and she swings
Jeremy gives his son the same push, but he only swings about two feet high. What could account f
the kids got?
Jeremy's daughter has more mass, so it takes less force to get her into the air.
Jeremy's son has more mass, so it would take more force to reach the same height as his da
O
Jeremy's son has less mass, so it would take more force to reach the same height as his da
O
Jeremy's daughter has more mass, so she accelerates faster than his son.
What is the capacitance of a capacitor that has 7.9 x 107 C of charge and a potential
difference of 12.0 V?
Answer:
6.58×10⁶ F
Explanation:
Applying,
Q = CV..................... Equation 1
Where Q = charge of the capacitor, C = Capacitance of the capacitor, V = Volatage
Make C the subject of the equation
C = Q/V................. Equation 2
From the question,
Given: Q = 7.9×10⁷ C, V = 12.0 V
Susbtitute these values into equation 2
C = 7.9×10⁷/12
C = 6.58×10⁶ F
In order for Ohm's law to apply, which of the following must be constant in the conductor?
A. Resistance
B. Temperature
C. VOltage
D. CUrrent
What is the difference between the chemical bonds formed in molecules of
N2 and the chemical bonds formed in crystals of Mgo?
A. MgO is a covalent substance, and N2 is an ionic substance.
B. Both N2 and MgO are covalent substances, but the bonding
electrons in MgO are shared more equally between atoms than
they are in N2
C. Both N2 and MgO are covalent substances, but the bonding
electrons in N2 are shared more equally between atoms than they
are in Mgo.
D. Mgo is an ionic substance, and N2 is a covalent substance.
Answer:
D
Explanation:
Mgo is ionic and N2 has covalent bonds
For each statement in the rows, select the most suitable option (words) in the columns. One selection for each row.
Series Circuits. Parallel Circuits. Series and parallel circuit.
The total voltage across
each component is the
same as the total voltage
being supplied to the circuit .
The Current is the equal at
all parts of the circuits.
Total current is divided among all
the components in the circuits.
The voltage is divided into all the
components in the circuits.
Answer:
the answer is most likely likely to be 2
Calculate the spring constant if the mass is 55g and the extension is 2m
Answer:
0.2695 N/m
Explanation:
Applying,
F = ke................. Equation 1
Where F = Force on the spring, k = spring constant, e = extension.
make k the subject of the equation
k = F/e............ Equation 2
But,
F = mg................. Equation 3
Where m = mass, g = acceleration due to gravity
Substitute equation 3 into equation 2
k = mg/e................... Equation 4
From the question,
Given: m = 55 g = 0.055 kg, e = 2 m
Constant: g = 9.8 m/s²
Substitute these values into equation 4
k = (0.055×9.8)/2
k = 0.2695 N/m
What is the reciprocal of X/1
Answer:
Explanation:
the answer is there, is in the graph
How much would an 80.0kg person weigh on Mars, where the acceleration of gravity is 3.93m/s and in Earths moon, where the acceleration of gravity is 1.63m/s
Answer:
this is the answer
Explanation:
This is the solution, hope it helps
When was Volleyball originated?
Answer:
Volleyball was invented in 1895 by William G. Morgan, physical director of the Young Men's Christian Association (YMCA) in Holyoke, Massachusetts.
Please help I’ll give brainliest
What would the final volume of 40 L of gas at 80 pascals be if the pressure increases to 130 pascals?
Answer:
Final volume, V2 = 24.62 L
Explanation:
Given the following data;
Initial volume = 40 L
Initial pressure = 80 Pa
Final pressure = 130 Pa
To find the final volume V2, we would use Boyles' law.
Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.
Mathematically, Boyles law is given by;
[tex] PV = K[/tex]
[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]
Substituting into the equation, we have;
[tex] 80 * 40 = 130V_{2} [/tex]
[tex] 3200 = 130V_{2} [/tex]
[tex] V_{2} = \frac {3200}{130}[/tex]
[tex] V_{2} = 24.62 [/tex]
Final volume, V2 = 24.62 Liters
PLEASEEEEEEEEE HELP ME PLEASE I NEED HELP WITH THIS QUESTION
Using the sport skills of agility and reaction time, devise three activities which would help a firefighter respond to an emergency in a more competent manner. Please be sure to accurately define these sport skills in your explanation. (5 points)
Which of the following best describes the use of a non-renewable resource? Nuclear energy heats water into steam that turns the turbines of a power plant. Water falls through openings in a dam turning turbine blades that generate electricity. Wind turbines gather energy from the wind and convert it into electrical energy. The electronic signs along the highway are run by solar power.
Nuclear energy ... non-renewable. It uses up the Uranium, and then we have to dig more Uranium out of the ground.
Water falling ... renewable kinetic energy, as soon as the sun lifts the water back up into the sky, and then it falls intk the lake again, and runs through the turbines again.
Wind turbines ... renewable kinetic energy, as soon as the sun heats the world unevenly again, and winds blow again.
Electronic signs run by solar power ... the solar power shines down on us, and will continue doing that for a few more billions of years, whether we use it or not. So we don't use up the sun by grabbing some of that energy.
Answer:
I just took the test and its A
Explanation:
Nuclear energy heats water into steam that turns the turbines of a power plant.
Which term describes an area of low density in a longitudinal wave?
A. Crest
B. Compression
C. Rarefaction
D. Trough
Answer: rarefaction
Explanation: correct answer on a p e x
Rarefaction term describes an area of low density in a longitudinal wave.
What is wave ?Wave is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.
There are two types of the wave longitudinal wave and transverse wave. Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a transverse in nature wave.
In Longitudinal wave, wave carries energy and momentum with compression and rarefaction. Compression is region of high density, in this region particles of the medium is compressed. rarefaction is region of expansion and it is low density region of longitudinal wave.
Hence option C is correct.
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HELP ASAP Miguel claims that as a ball falls, it loses potential energy. Izzy claims that as a ball falls, it
gains kinetic energy. Can both students be correct? Describe the evidence which would support
either student.
Answer and Explanation:
They are both correct.
This is because potential energy is when there is potential for the object to have energy, while kinetic energy is energy that is moving already.
So, as the ball falls, it loses its potential energy, or "still/Stalled" energy, and gains kinetic energy, or moving energy.
#teamtrees #PAW (Plant And Water)
can noble gases bond with other elements?
Answer:
No
Explanation:
[tex]give \: some \: example \: of \: non - contact \: force \: [/tex]
Why is the horizontal velocity of a
projectile constant?
Answer:
Explanation:
I'll try to answer this is clearly as possible without talking in circles. If an object is launched into projectile motion, something was behind it, pushing it forward. Once this launching was done, the launching mechanism was no longer important to the object and the object is free to keep moving forward at that same velocity forever...if that was the only thing at play here. But, because of air resistance and GRAVITY, the object is pulled down and eventually hits the ground. In other words, if there was no such thing as gravity, an object would continue to move forever in the diretion and at the speed at which it was launched.
Which identification and treatment model takes family environment into account for diagnosis and treatment?
If this question is the essay one the answer would be " The biopsychosocial model is the distinguishing proof and treatment model that considers family climate for conclusion and treatment. It takes a gander at both clinical and mental reasons for problems, and treats mental issues as cooperation of natural, mental, and sociocultural components. Family climate is considered as one of these sociocultural elements."
A metal ball rolls from rest at Point A down the track to Point E as shown below.
At which point in the picture above is the velocity at its greatest?
Answer:
Explanation:
Velocity is at its greatest when kinetic energy is at its max which is when all the ball's energy has been transformed from potential energy to kinetic energy which is at the lowest point in its travels (assuming the ball is rolling down a ramp). You have no picture here so this answer is a general one, not a specific one.
A 0.413 kg block requires 1.09 N
of force to overcome static
friction. What is the coefficient
of static friction?
(No unit)
Answer:
Explanation:
The equation for this is
f = μ[tex]F_n[/tex] where f is the frictional force the block needs to overcome, μ is the coefficient of static friction, and [tex]F_n = w=mg[/tex] (that means that the normal force is the same as the weight of the block which has an equation of weight = mass times the pull of gravity). Filling in:
1.09 = μ(.413)(9.8) and
μ = [tex]\frac{1.09}{(.413)(9.8)}[/tex] so
μ = .27
The coefficient of static friction for the given block is equal to 0.27.
What is static friction?Static Friction can be defined as friction that is experienced by an object when it is placed on a surface. Kinetic friction can be defined as friction due to the movement of a body on a surface. The coefficient of static friction can be described as a scalar parameter and is denoted as μs.
The coefficient of static friction can be determined from the following expression:
[tex]\displaystyle \mu_s = \frac{F}{mg}[/tex]
Where F is the applied force, m is the mass of the object and g is the gravitational acceleration.
Given, the force acting on the block to overcome static friction = 1.09 N
The mass of the block, m = 0.413 Kg
The gravitational acceleration, g = 9.8m/s²
The coefficient of static fraction = 1.09/(0.413 ×9.8) = 0.27
Therefore, the coefficient of static friction is 0.27.
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