Which best describes the way particles move to heat objects using conduction? A. Fast moving particles in warm objects collide with electromagnetic waves. B. Objects generate electromagnetic waves are carried away from the object emitting them. C. Particles expand with thermal energy, hot air rises and pushes cooler air down through circulation. D. Fast-moving particles collide with slower moving particles transferring their heat energy.

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

there are no contact forces mentioned on the list of choices that you've provided.