What is true for two pieces of iron at the same temperature? 1.Heat flows from the object with higher potential energy to the object with lower potential energy. 2.The average kinetic energy of their particles is the same. 3.Heat flows from the larger object to the smaller object. 4.The total kinetic energy of their particles is equal.

false

explanation:

boats, things on boats luggage are way more heavy then water.

i think the answer would be b

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