Four identical rods are joined to from a square. If the temperature difference across one diagonal is 100° C, then temperature difference across another diagonal will be
Options
(a) 100° C (b) 0° […]
If the terminal speed of a sphere of gold (density=19.5 kg/m³) is 0.2 m/s in a viscous liquid (density=1.5 kg/m³) find the terminal speed of a sphere of silver (density 10.5 kg/m³) of the same […]
A black body at a temperature of 227⁰C radiates heat at a rate of 20 cal m⁻²s⁻¹. When its temperature is raised to 727⁰C, the heat radiated by it in cal m⁻²s⁻¹ will be closest […]
A wire is suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy […]
If the temperature of the sun were to increase from T to 2T and its radius from R and 2R, then the ratio of the radiant energy received on earth to what it was previously […]
A wooden stick 2 m long is floating on the surface of water. The surface tension of water is 0.07 N/m. By putting soap solution on one side of the sticks, the surface tension is […]
A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool from 40⁰C to 28⁰C if the surrounding temperature is 10⁰C? Assume Newton’s law of cooling
A glass flask weighing 390 g having internal volume 500 cc just floats when half of it is filled with water. Specific gravity of the glass is
Options
(a) 2.8 (b) 1.8 (c) 1 […]
The value of Poisson’s ratio lies between
Options
(a) 0 to 0.5 (b) 0.5 to 1 (c) (-1 to 1) (d) (-1 to 1.5)
Correct Answer:
0 to 0.5
Explanation:
No explanation available. […]
Two bodies A and B having temperature 327° C and 427° C are radiating heat to the surroundings. The surrounding temperature is 27°C. The ratio of rate of heat radiation of A to that of […]
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