1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Igoryamba
3 years ago
15

Explain why the brakes of a car get much hotter than the brakes of a bicycle?

Physics
1 answer:
ValentinkaMS [17]3 years ago
8 0

Answer: Car brakes produces more energy then the bicycle because the cars wheels produces a much bigger force that makes the car go and to stop that force the car uses greater amount of energy that transfers to heat  but in a bicycle the wheels do not turn that fast so when you press the break there is less energy that transfer to heat.

Explanation:

You might be interested in
Tire or false
spayn [35]
1 and 4 are tire.
2 and 3 are not.
8 0
2 years ago
A boy is exerting a force of 70 N at a 50-degree angle on a lawn mower. He is accelerating at 1.8 m/s2. Round the answers to the
charle [14.2K]

Answer:

are you in middle school

Explanation:

need more evendice

8 0
2 years ago
A vertical spring with a spring constant of 420 N/m is mounted on the floor. From directly above the spring, which is unstrained
mixas84 [53]

Answer:

19.53 cm

Explanation:

The computation of the height is as follows:

Here we applied the conservation of the energy formula

As we know that

P.E of the block = P.E of the spring

 m g h = ( 1 ÷ 2) k x^2

where

m = 0.15

g = 9.81

k = 420

x = 0.037

So now put the values to the above formula

(0.15) (9.81) (h) = 1 ÷2 × 420 × (0.037)^2

1.4715 (h) = 0.28749

h = 0.19537 m

= 19.53 cm

3 0
2 years ago
5) When a substance changes its state, all BUT ONE of these statements is true That is A) Mass remains constant B) Only the form
expeople1 [14]
C) kinetic energy changes. Gas>liquid>solid
7 0
2 years ago
Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. transferring 1.50 ×109 electrons from one disk to the o
blondinia [14]

The diameter of the disks is 1.32 cm.

If n electrons each of charge e are transferred from one disc to another, calculate the total charge Q transferred from one disc to the other using the expression,

Q=ne

Substitute 1.50×10⁹ for n and 1.6×10⁻¹⁹C for e.

Q=ne\\ =(1.50*10^9)(1.6*10^-^1^9C)\\ =2.4*10^-^1^0C

The potential difference V between the disks separated by a distance d is given by,

V=Ed

here, E is the electric field.

Substitute 2.00×10⁵N/C for E and 0.50×10⁻³m for d.

V=Ed\\ =(2.00*10^5N/C)(0.50*10^-^3m)\\ =100V

The capacitance C of the capacitor is given by,

C=\frac{Q}{V} \\ =\frac{(2.4*10^-^1^0C)}{100V} \\ =2.4*10^-^1^2F

The capacitance of a parallel plate capacitor is given by,

C=\frac{\epsilon_0A}{d}

Here, ε₀ is the permittivity of free space  and A is the area of the disks.

Rewrite the expression for A.

C=\frac{\epsilon_0A}{d}\\ A=\frac{Cd}{\epsilon_0} \\ =\frac{(2.4*10^-^1^2F)(0.50*10^-^3m)}{(8.85*10^-^1^2C^2/Nm^2)} \\ =1.36*10^-^4m^3

the area A of the disks is given by,

A=\frac{\pi D^2}{4} \\ D=\sqrt{\frac{4A}{\pi } }

Here, D is the diameter of the disk.

D=\sqrt{\frac{4A}{\pi } }\\ =\sqrt{\frac{4(1.36*10^-^4m^2)}{3.14} } \\ =0.01316m\\ =1.32cm

The diameter of each disc is found to be 1.32 cm.



7 0
3 years ago
Other questions:
  • Calculate the volume of a 45 kg bucket knowing its density which is 2.7 kg/m3 (cubic meters)
    8·1 answer
  • Kinetic Energy RE-
    11·1 answer
  • What will be the wavelength of a photon that is emitted when an electron of a hydrogen atom undergoes a transition from n=7 to n
    5·1 answer
  • Which term is defined as the force applied to the object divided by the mass of the object?
    12·1 answer
  • Think about plotting the distances as points on a number line where 0 represents the position of the Sun. Based on your scaling
    13·1 answer
  • An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine
    11·1 answer
  • Try to move the magnet back and forth between the two coils. Explain the motion of the magnet and what might be causing this.
    8·1 answer
  • Does the collision between the cart and the brick follow the law of momentum conservation? Make a claim (yes or no) and support
    14·1 answer
  • PLEASE HELP!!!!!!!!! 30 POINTS
    15·1 answer
  • The force of repulsion that two like charges exert on each other 5N. what will be if the distance between the charge is decrease
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!