Physics Past Questions and Answers

Which of the following factors affects the speed of sound in air? i. Temperature ii. pressure iii. Frequency

The speed of sound in air at sea-level is 340ms<sup style='font-size: smaller;'>-1</sup> while that of light is 300 000kms<sup style='font-size: smaller;'>-1</sup>. How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightening flash?

A slight loading of a tuning fork has the effect of

Two strings of the same length and under the same tension gives notes of frequencies in the ratio 4 : 1. The masses of the strings are in the corresponding ratio of

To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m?