## Physics On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because

metals have higher thermal capacity than plastics
plastics have a lower density than metals
plastics have a higher thermal conductivity than metals
metals are good conductor of heat

3.3 km, 0.30 km
1.8 km, 0.15 km
2.2 km, 0.20 km
2.8 km, 0.25 km

## Physics Intensity of sound at a point is ____ its distance from the source.

inversely proportional to square of
directly proportional to
inversely proportional to
directly proportional to square of

## Physics Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
at the top of Mt. Everest
at a place in a valley below sea level
at sea level

## Physics Radio telescopes are better than optical telescopes because

they can work even in cloudy conditions
All of these
they can detect faint galaxies which no optical telescope can
they can work during the day and night