Physics Questions

The spring balance works on the principle of __________

To hear a distinct echo the time interval between the original sound and the reflected sound must be at least

What is the SI unit of Force?

____________________is a measure of the actual amount of water vapour in a particular sample of air: measured as a partial pressure.

Find the power of a convex lens if the image formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre?

Humidity is a measure of the _______________.

The pitch of a sound depends on its ____.

Light travels fastest in