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
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If g = 9.8 m/s2, what is the minimum force required to lift…
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
During the time a vapor condenses to a liquid
Which of the following is NOT a form of mechanical energy?
Which of the following is NOT a form of mechanical energy?
According to Newton’s second law of motion
According to Newton’s second law of motion
Which of the following is not a method of heat transfer?
Which of the following is not a method of heat transfer?
Which of the following is NOT a unit for area?
Which of the following is NOT a unit for area?
A method of heat transfer in a medium in which heated part o…
A method of heat transfer in a medium in which heated part of the medium moves away creatng space for the cold part to move in is called:
Energy produced by burning fuel is called:
Energy produced by burning fuel is called:
Which of the following is/are true according to Newton’s sec…
Which of the following is/are true according to Newton’s second law? (i) an unbalanced force always brings a moving object to rest (ii) an unbalanced force on an object always produces an acceleration on it (iii) the acceleration of a moving object is directly proportional to the unbalanced force acting on it.