Question 1
State two quantities on which expansion on heating of a metal depends
Answer
- The length of metal
- The cross sectional area
- The cross sectional area
Question 2
Explain why gas cylinders are likely to expand incase of a fire out break
Answer
- The pressure of the gas inside increases since the volume is fixed
- There is increased collision with the walls
- There is increased collision with the walls
Question 3
A hammer is used to hit a round piece of lead into a flat shape. It is observed that the temperature of the piece of lead rises through several degrees. State the energy transformation.
Answer
Mechanical energy to heat energy
Question 4
State the type of equilibrium for a rubber ball placed on a horizontal table
Answer
Neutral equilibrium
Question 5
A ball is thrown vertically upwards and returns to its starting point after 6 seconds. Calculate the maximum height reached(g=10/s2)
Answer
