A heated gas expands, raising a piston. Which of the following describes the energy exchanges of this process? a. Energy is transferred to the gas by the piston and to the piston from the heat source.
b. Energy is transferred directly to the piston from the heat source.
c. Energy is transferred to the gas from the heat source and to the raised piston from the gas.
d. Energy is transferred to the gas in the form of heat and work done by the piston.

explanation:

newton's third law, for every action there is an equal and opposite reaction.

a.   mass number from atomic number

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