Question Library

The heat absorbed by a 2.4 m\(^2\) of a brick oven whose temperature gradient is 400 K m\(^{−1}\) in 2 hours is [k = 0.85 W m\(^{−1}\)K\(^{−1}\)]

What amount of heat energy can cause 16kg of dried ice to melt completely? Assuming no heat was lost to the surroundings. (L = 336 J kg\(^{−1}\))

A well-lagged thin metal rod of length 0.2 m has a temperature gradient of 416 K m\(^{-1}\). If one end is at 233º C, what is the temperature at the other end?

288KJ is conducted across two opposite faces of a 3m cube of temperature gradient 90ºCm\(^{-1}\) in 7200s. Calculate the thermal conductivity.

A blacksmith heated a metal whose cubic expansivity is 3.9 x 10\(^{-6}\)K\(^{-1}\). Calculate the area expansivity.

The vacuum and silvered wall surfaces of a vacuum flask walls are respectively

In which of the following devices is the thermal expansion considered a disadvantage?

The diagram above illustrates the graph for

The surface temperature of a swimming pool on a warm day is 25ºC and the temperature at the bottom is 15ºC. If the swimming pool has a surface area of 620 \(m^2\) and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool. [Thermal conductivity of water (k) = 0.6071 Wm-1K-1]

In the formation of sea breeze, wind blows from?

The diagram above is the heating curve for a solid, QR is the?