physics

Melting ice cools an orange drink far better than the same mass of ice-cold water because?

A. melting ice is lower temperature than ice-cold water B. water has higher specific heat than ice C. ice floats…

5 years ago

A tap supplies water at 26°C while another supplies water at 82°C. If a man wishes to bathe with water at 40°C the ratio of hot mass of hot water to that of cold water required is?

A. 1:3 B. 3:1 C. 3:7 D. 7:3 E. 15:8 Correct Answer: Option A - 1:3 Explanation heat supplied by…

5 years ago

A team trap is a component of the apparatus used in determining the specific latent heat of vaporisation of steam. In the steady steady state, the steam trap

A. stores the steam for future use B. prevents the steam from escaping C. ensures that only dry steam gets…

5 years ago

The boiling point of a liquid depends on the following except the?

A. nature of the liquid B. external pressure C. volume of the liquid D. impurities present in the liquid E.…

5 years ago

A boatman facing north wants to cross a flowing river to a point directly opposite its position at the other bank. If the river is flowing eastwards, in what direction should he row his boat?

A. west B. east C. north-west D. north-east E. south-west Correct Answer: Option C - north-west

5 years ago

The diagram represents a block-and-tackle pulley system on which an effort of 50N is just able to lift a load of weight W. If the efficiency of the machine is 40%. find the value of W

  A. 300N B. 200N C. 140N D. 120N E. 20N Correct Answer: Option D - 120N Explanation Eff =…

5 years ago

The product PV where P is pressure and V is volume has the same unit as?

A. power B. work C. acceleration D. impulse E. force Correct Answer: Option B - work Explanation P = N/m²…

5 years ago

Power is defined as the?

A. capacity to exert a force B. product of force and time C. product of force and distance D. ability…

5 years ago

An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10m/s²)

A. 3.0s B. 4.5s C. 6.0s D. 7.5s E. 9.0s Correct Answer: Option A - 3.0s Explanation s = ut…

5 years ago

The diagram below shows the position of a simple pendulum set in motion. At which of the positions does the pendulum have maximum kinetic energy?

A. 5 B. 4 C. 3 D. 2 E. 1 Correct Answer: Option C - 3

5 years ago
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