Which of the following devices is used to compare the relative magnitudes of charges on two given bodies?

The instrument used to measure relative humidity is a

A ball of mass 0.8 kg is dropped from a height, H. Just before hitting the ground, its velocity is 5.0 m/s. Determine H.
[g = 10 ms-2]

The following statements are observations made about a towing vehicle and a bus that is being towed
I. The force exerted on the bus by the towing vehicle is of the same magnitude as the force that the bus exerts on the road.
II. The force exerted on the bus by the towing vehicle is of the same magnitude as the force exerted on the towing vehicle by the bus.
III. The towing vehicle exerts a force on the bus greater than the force exerted by the bus on the towing vehicle.
IV. The towing vehicle exerts a force on the bus that is the same as the force the road exerts on the towing vehicle.
Which of the following statements is/are correct?

Which of the following statements about a ferromagnetic material is correct? It