Shanti is riding on a train that is moving at a speed of 90 km/h. he is carrying a power cord for his phone that is 1.2 m long.
which describes the length of the power cord when shanti gets off the train? cannot be determined
less than 1.2 m
more than 1.2 m
equal to 1.2 m

equal to 1.2m

Explanation:

because she is only traveling by train .

Equal to 1.2 m

Explanation:

Given,

The cord having length 1.2 m is carried inside a train which is moving at the speed of 90 km/h,

∵ The measurement of an object placed inside a moving thing is not affected by the movement.

Thus, the length of chord would not be changed,

Hence, the length of the power cord when Shanti gets off the train would be equal to 1.2 m.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.