1.When a constant force is applied to a body, it moves with uniform

2.Four identical kettles, having the same amount of water, have basesmade of different metals of same thickness. If these kettles are placed on identical flames, water will boil first in the kettle the base of which is made of

3.The first operational compound microscope was developed by

4.A weather balloon is not fully inflated on the ground because

5.The weight of an object would be minimum when it is placed