3 years ago

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

1 answer:

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:

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Explain how to measure volume using a graduated cylinder

Reil [10]

Put object into cylinder and notice the volume increased. Difference of volume is the object's volume

6 0

3 years ago

One hundred turns of insulated copper wire are wrapped around an iron core of cross-sectional area 0.100m2. As the magnetic fiel

bagirrra123 [75]

Answer:

The voltage induced in the coil is 1.25 V.

Explanation:

Given;

number of turns, N = 100 turns

cross sectional area of the copper coil, A = 0.1 m²

initial magnetic field, B₁ = 0.5 T

final magnetic field, B₂ = 1.00 T

duration of change in magnetic field, dt = 4 s

The induced emf in the coil is calculated as;

$emf = -N\frac{\delta \phi}{\delta t} \\\\emf = - N (\frac{\delta B}{\delta t}) A\\\\emf = -N (\frac{B_1 -B_2}{\delta t} )A\\\\emf = N(\frac{B_2-B_1}{\delta t} )A\\\\emf = 100(\frac{1-0.5}{4} )0.1\\\\emf = 1.25 \ Volts$

Therefore, the voltage induced in the coil is 1.25 V.

6 0

3 years ago

Need help ???? Only answer if you think you know it

charle [14.2K]

Answer:

I believe it would be Direction B

Explanation:

After passing A, gravity would pull the ball downwards

5 0

3 years ago

A stuntman of mass 55 kg is to be launched horizontally out of a spring-

zepelin [54]

Answer:20

Explanation: i konw this stuff

6 0

3 years ago

The velocity versus time graph of particle A is tangent to the velocity versus time graph for particle B at point O. What is the

Fudgin [204]

Answer: C. -1.16 meters/second2

Explanation:

A= v/t (velocity/time)

in this case: v=7 and t=6

So, A= 7/6

A=1.16

The graph is decreasing so accelleration would be negative

A= -1.16 meters/second2

Option C! ; )

3 0

3 years ago