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2 years ago

A moving car has 2000 J of kinetic energy. If the speed doubles, how much kinetic energy would it have?

1 answer:

7 0

Given,
Kinetic energy of the car = 2000 J
speed of the car is doubled
we know,

now, speed of the car is doubled
v' = 2 v

Using

=1/22

Hence, the Kinetic energy would be equal to 8000 J.

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3 years ago

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2) Two railway tracks are parallel to west east direction. Along one track, train A moves with a speed of 45 m/s from

Natalija [7]

Answer:

105 m/s

Explanation:

Given that the speed of train A, $V_A$ = 45 m/s from west to east.

Speed of train B, $V_B$ = 60 m/s from east to west.

Train B is moving in the opposite direction with respect to the speed of train A. Assuming that the speed from east to west direction is positive.

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Hence, the speed of train B w.r.t train A is 105 m/s from east to west.

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2 years ago

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2 years ago

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2 years ago

Students want to investigate the inverse relationship between the pressure and temperature of an ideal gas as predicted by the i

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Answer:

Option B, Fix the piston in place so the volume of the pas remains constant

Explanation:

As we know

$\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}$

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2 years ago