Read the given experiment and answer the question. Thumbtacks are stuck to a metal rod with wax and a lighted candle is kept below the rod as shown in the diagram below.
Which one of the thumbtacks will fall off the metal rod first?
Important Questions on Heat
Read the given experiment and answer the question. Thumbtacks are stuck to a metal rod with wax and a lighted candle is kept below the rod as shown in the diagram below.
What does this experiment illustrate?
Which canned drink will remain cold the longest?
A student took an iron rod and a wooden rod and wrapped each of them in a piece of paper. These rods were then heated as shown. It was found that the paper around the iron rod does not burn whereas the one around the wooden rod catches fire. It is because
Rohan wants to test whether a white object or a black object would heat up faster in the Sun. The given picture shows you his experiment. These thermometers were left out in the Sun for minutes. Which of the following statements is true?
The bimetallic strip made up of aluminium and copper, when heated bends in the direction shown here. Which metal expands more when the two are heated at the same temperature?
Statement 1: An iron ball at is dropped in a mug containing water at . Then the heat will flow from the water to the iron ball.
Statement 2: In convection, heated molecules of a liquid themselves move to carry heat from the hot region to the cold region.
