Physics questions
20027 published questions with worked solutions.
- In the above question, the body that cool slowest is
- Newton's law of cooling can be obtained from
- Two spheres of radii in the ratio 1 : 2, densities in the ratio 2 : 1 and of Same specific heat are heated to the Same...
- If the temperature of a hot body is raised by 8%, then the heat energy radiated would increase by
- A body cools at the rate of 0.6°C/s when it is 40°C above the surrounding. The rate of cooling when it is at 10°C above the same...
- A body cools at the rate of 3°C/min, when its temperature is 50°C. If the temperature of its surroundings is 25°C, then the rate...
- A body cools from 60°C to 50°C in 10 minutes. If the room temperature is 25°C and assuming Newton's law of cooling to hold good,...
- You are given two spheres of same material and radii 10 cm and 20 cm. They are heated to the same temperature. They are placed in...
- A body cools at the rate of 1.5°C/min when its temperature is 30°C above that of the surrounding. At what temperature above the...
- A body cools at the rate of 0.50°C/s when it is 50°C above the surrounding. Its rate of cooling when it is 30°C above the same...
- Two hot bodies B_1 and B_2 are taken at temperatures 100°C and 80°C respectively at t = 0 and the temperature of the surrounding...
- A body cools in 7 minutes from 60°C to 40°C. Its temperature after the next 7 minutes is (temperature of the surroundings is 10°C)
- A body takes 4 minutes to cool from 100°C to 70°C, If the room temperature is 25°C, then the time taken to cool from 70°C to 40°C...
- A body cools from 50°C to 49.9°C in 5 s. The temperature of the surrounding is 30°C. How long will the body take to cool from...
- A body cools from 60°C to 52°C in five minutes. What will be further fall in temperature in the next five minutes? If the...
- A sphere and a cube of equal volumes both are made of iron and have similar surface. If both are heated to the same temperature...
- According to Newton's law of cooling, the rate of cooling of a body is proportional to ( )^n, where is the difference of the...
- The temperature of the sun cannot be found out by using:
- The concept of net loss or net gain of heat radiation by mutual exchange of radiation was put forth by :
- A cup of tea cools from 80°C to 60°C in one minute. The ambient temperature is 30°C. In cooling from 60°C to 50°C it will take: