A sound wave has time period 0.01 s. Its frequency is MCQ with Answer and Explanation

Explanation:
Heat is energy transferred due to temperature difference.

Explanation:
Lenz's law is a consequence of the conservation of energy. It dictates that an induced electromotive force (EMF) always gives rise to a current whose magnetic field opposes the change in original magnetic flux that produced it. If a north pole approaches a coil, the coil face becomes a north pole to repel the magnet, requiring work to overcome.

Explanation:
Number of half-lives = 30/10 = 3. Remaining = (1/2)³ = 1/8. Exponential decay N = N₀(1/2)^(t/T). Radioactive decay constant λ = ln2/T.