1. | \(4.0~\text{N}\) | 2. | \(12.5~\text{N}\) |
3. | \(0.5~\text{N}\) | 4. | \(6.25~\text{N}\) |
1. | \(\frac{\mathit{\pi}}{6}\) | 2. | \(\frac{{2}\mathit{\pi}}{3}\) |
3. | \(\frac{\mathit{\pi}}{4}\) | 4. | \(\frac{\mathit{\pi}}{3}\) |
Assertion (A): | In a stationary wave, there is no transfer of energy. |
Reason (R): | The ratio of kinetic energy to potential energy is independent of the position. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |
Assertion (A): | The change in air pressure affects the speed of sound. |
Reason (R): | The speed of sound in gases is proportional to the square of pressure. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | Ocean waves hitting a beach are always found to be nearly normal to the shore. |
Reason (R): | Ocean waves are longitudinal waves. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |