Explain the following
When a corridor train suddenly starts, the sliding doors of some compartments may open.

Explain the following When a train suddenly moves forward, the passenger standing in the compartment tends to fall backwards.

Explain the following term Sliding friction

Explain the following: Why the weather becomes bitterly cool when snow starts melting?

Explain the following: In winter, water tank (or ocean) starts freezing from the surface and not the bottom.

Explain the following : Orange colour of bromine disappears when ethene is passed through it

Explain the following: Micturition is reflex process, but is under some voluntary control.

“When a train suddenly moves forward, the passenger standing in the compartment tends to fall backwards". Explain.

Explain the following: (a) The surrounding become pleasantly warm when water in a lake starts freezing in cold countries. (b) The heat supplied to a substance during its change of state, does not cause any rise in its temperature.

One of 10 keys open the door. If we try the keys one after another, then find the following: (i) The probability that the door is opened on the first attempt. (ii) The probability that the door is opened on the second attempt. (iii) The probability that the door is opened on the 10th attempt.

An inductor is connected to a battery through a switch. Explain why the emf induced in the inductor is much larger when the swithc is opened as compared to the emf induced when the switch is closed.