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 into the calorimeter D. allows condensed steam to go into the calorimeter E. determine the quantity of steam used Correct Answer: Option C – ensures that...
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. degree of it’s molecular cohesive force Correct Answer: Option C – volume of the liquid
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
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 = MA/VR x 100% 40 = MA/60 MA = 240 LE=240/100 W = L = (240 x 50)/100 =...
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 V = m PV = Nm unit of workProducts
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