Physics

An object of mass 20kg is released from a height of 10m above the ground level. The kinetic energy of that object just before it hits the ground is

The pitch of a note is not affected by

A sonometer wire of length 100 cm, under a tension of 10 N, has a frequency of 250 Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350 Hz. The new tension is

A converging lens of focal length 10cm forms an erect image three times the size of the real object. Calculate the distance between the object and the image