Physics
(a) Which characteristic of sound is affected due to the larger surface of a school bell?
(b) Calculate the distance covered by the Ultrasonic wave having a velocity of 1.5 kms-1 in 14 s, when it is received after reflection by the receiver of the SONAR.
Related Questions
A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:
(a) the work done by the engine.
(b) the power of the engine.
A metre scale of weight 50 gf can be balanced at 40 cm mark without any weight suspended on it.
(a) If this ruler is cut at its centre then state which part [0 to 50 cm or 50 to 100 cm] of the ruler will weigh more than 25 gf.
![A metre scale of weight 50 gf can be balanced at 40 cm mark without any weight suspended on it. If this ruler is cut at its centre then state which part [0 to 50 cm or 50 to 100 cm] of the ruler will weigh more than 25 gf. What minimum weight placed on this metre ruler can balance this ruler when it is pivoted at its centre? ICSE 2023 Physics Solved Question Paper.](https://cdn1.knowledgeboat.com/img/abp10/5/q6ii-icse-2023-physics-question-paper-solved-719x93.png)
(b) What minimum weight placed on this metre ruler can balance this ruler when it is pivoted at its centre?
(a) Complete the following nuclear changes:
23892P ⟶ Q + 42He ⟶ R + 0-1e
(b) Name the nuclear radiation which has the highest ionizing power.
We are able to see the T.V. channels clearly when we set T.V. on auto-tuning.
(a) Which phenomenon led to the clear visibility of the channels, due to auto tuning?
(b) Define the above phenomenon mentioned by you.
(c) Give any one more example of this phenomenon.