Question 1
What is the reading on the micrometer screw gauge shown below with an error of +0.5mm?
Answer
Question 2
In a ball and ring experiment, the ball goes through the rings at room temperature. When it is heated it does not go through the ring, but when left on the ring for some time, it goes through. Explain this observation
Answer
The ball expands when heated and cannot go through the ring, but when left on the ring for sometime it heats the ring causing the ring to expand hence it passes through
Question 3
In the study of free fall, it is assumed that the force F acting on a given body of mass, m, is gravitational, given by F = ma. State two other forces that act on the same body
Crests of the same water waves are now approaching a narrow opening. Sketch the crests after passing through the opening
Answer
Upthrust and frictional force
Question 4
In the set up shown below, it is observed that the level of the water initially drops before starting to rise. Explain this observation
Answer
Glass flask expands first, creating more volume for water . Water then expands increasing its level in the tube
Question 5
Distinguish between speed and velocity.
Answer
Speed is the distance covered per u nit time, while velocity of the sped is in a specified direction