A piece of ice is floating in a glass of water. When ice melts, water level MCQ with Answer and Explanation

Explanation:
Vertical motion is independent of horizontal. t = √(2h/g). Mass doesn't affect. Horizontal velocity affects range, not time of fall. Projectile motion independence of perpendicular components.

Explanation:
The Doppler Effect is the apparent change in the frequency (and thus pitch) of a wave due to the relative motion between the source and the observer. As the ambulance approaches, sound waves get compressed, increasing the perceived frequency (higher pitch). As it moves away, waves stretch, lowering the frequency.

Explanation:
Fuse wire must melt easily (low MP) and develop enough heat (high R) to break circuit on overload.