Convection currents will transfer heat throughout a gas until what condition arises? A.
The gas condenses and forms a liquid.

B.
The gas particles stop moving entirely.

C.
The gas has the same temperature throughout.

D.
The gas has no thermal energy in it.

C

Explanation:

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The gas has the same temperature throughout. (C)

answer: f

explanation: g

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s