Author: Anonymous

When a bullet is fired from a gun, as the bullet accelerates forward, the gun recoils backward. This phenomenon is explained by:

Which of the following is NOT a form of heat transfer?

Which of the following electromagnetic radiations is heat radiation?

Which of the following is equal to 1 mg ? (i) 10 -2  g (ii) 10 -3  g (iii)  100 g (iv) 1000 g

When a child on a swing is pulled to one side and released, the swing goes back and forth changing energy from potential to kinetic and back continuously. The physical law involved in this is:

If latent heat of fusion of ice is 3.34 x 105 J/kg, what is the amount of heat required to melt completely 400 g of ice without a temperature change?(i)     1.34 x 105 J (ii)    2.68 x 105 J (iii)   13.44 x 105 J (iv)   26.8 x 105 J

If g = 9.8 m/s2, what is the minimum force required to lift a 100-kg object?

During the time a vapor condenses to a liquid

Which of the following is NOT a form of mechanical energy?

According to Newton’s second law of motion