(a)Consider one object which has a temperature of 70°C in another object which has a temperature of 10°C. The two objects are placed next to each other in the particles in each object begin colliding. Will any of the collisions result in the transfer of energy from object to the object one? Explain. (b)Suppose that object one in object to have reached a thermal equilibrium. Do the particles of the two objects steel collide with each other? If so do any of the collisions result in the transfer of energy between the two objects? Explain.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.