Physics Questions

Which among the following determines the pitch of a sound?

Find the acceleration (in m/s2) of a body which accelerates from 25 m/s to 30 m/s in 10 seconds

A Sonar of a ship sends sounds waves of speed 1000 m/s. These waves are reflected back by the ocean floor in 2 seconds. Find the depth (in m) of theocean floor. 

A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s2 for 4 seconds. Find the displacement (in m) of this body in these 4seconds.

Which instrument is used for measuring humidity of atmosphere?

A Sonar of a ship sends sounds waves of speed 1600 m/s. These waves are reflected back by the ocean floor in 4 seconds. Find the depth (in m) of the ocean floor.

When a number of resistors are connected in series in a circuit, the value of current:

Which rays cause skin damage?