Sweating gives cooling while
A) condensing
B) evaporating
C) both A and B
D) boiling
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Why does evaporation gives a cooling effect to the remaining liquid?
1. In the process of evaporation, faster moving molecules escape from surface of liquid overcoming the interatomic forces. 2. Since faster molecules are lost, the average kinetic energy of the liquid...
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In Newton’s law of cooling, the rate of fall of temperature
Correct option is: (C) decreases
2 Answers 1 views
The metal sphere cools at 1 °C/min, when its temperature is 50 °C. If the temperature of environment is 30 °C, its rate of cooling at 35 °C is
Correct option is: (A) 0.25 °C/min
2 Answers 3 views
While eating fruits like pear or guava, it feels gritty. What gives stiffness to these fruits?
Sclereids are found in pulp of fruits like pear and guava which gives them stiffness and thus we feel gritty while eating these fruits.
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The fielder pulls back his hands while catching a fast moving cricket ball. It gives ……………… a) less stopping distance
Correct option is B) b, d
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The fielder pulls back his hands while catching a fast moving cricket ball. It gives ……………… a) less stopping distance
2 Answers
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Assertion (A) : We feel cool after sweating. Reason (R) : We store water in earthen pots during summer.
A) Both (A), (R) are correct, (R) is not the correct explanation of (A).
2 Answers 1 views
If humidity increases, then rate of evaporation of sweating over the body
Correct option is B) decreases
2 Answers 1 views
The …… statement is especially useful when testing all the possible results of an expression? (a) while (b) do while
Correct answer is (a) while
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While writing a program Geo uses while loop but forgets to update the loop variable. What will happen?
The loop variable inside the while loop must be updated otherwise the loop will not be terminated. The loop will be work infinitely.
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