Rays from the sun are focused by a lens of diameter 5 cm on to a block of ice and 10 g of…
Physics · Class 11 · CBSE — Thermal Properties of Matter
Rays from the sun are focused by a lens of diameter 5 cm on to a block of ice and 10 g of ice is melted in 20 min. Therefore the heat from the sun reaching the earth per min per square centimetre is
(Latent heat of ice L = 80 cal g–1)
(Latent heat of ice L = 80 cal g–1)
- 2.04 cal
- 0.51 cal
- 4.08 cal
- 3.02 cal
Answer
(B) 0.51 cal
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- The graph between two temperature scales A and B is shown in figure. Between upper fixed point and lower…
- “The rate of loss of heat – dQ / dt of the body is directly proportional to the temperature difference D T =…
- A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. Find the rise in…
- A rectangular body has maximum wavelength l m at 2000 K. Its corresponding wavelength at 3000 K will be
- Consider a composite slab consiste of two different materials having equal thickness and thermal…
- The sprinkling of water reduces slightly the temperature of a closed room because
- For transmission of heat from one place to the other, medium is required in
- If 10 g of ice is added to 40 g of water at 15°C, then the temperature of the mixture is (specific heat of…
More Thermal Properties of Matter questions · Browse all practice questions