A block of aluminum is heated electrically by a 25 W heater. if the temperature rises by 10°C in 5 minutes, the heat capacity of the aluminum is?

If the partial pressure of water vapour at 27°C is 18 mm Hg and the saturated vapour pressure of the atmosphere at the same temperature is 24 mm Hg, the relative humidity at this temperature is?

In a good thermos flask, heat loss is reduced through the following features EXCEPT?

Given the progressive wave equation y = 5 sin (2000 πt - 0.4x), calculate wave length

The fundamental property of a propagating wave which depends only on the source and not the medium of propagation is the?