How far is the seismograph from the earthquake, When an earthquake occurs, ...

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 7.5 km/s and the secondary, or S, wave

Projectile, formula for maximum height.

formula for maximum height.

Forces and nature,

Direct current, A) Explain the flow of direct current? ( describe direct...

A) Explain the flow of direct current? ( describe direct current) b) Explain  the effect of resistance in circuits? (Describe  effect of resistance)

Photoelectric cell, A device which changes light energy into electrical ene...

A device which changes light energy into electrical energy is known as photoelectric cell. It is also known as photocell or electric eye.

What force does every one exert on the other, Regard as two charged particl...

Regard as two charged particles. At a given separation every particle exerts a force of 12 N on the other. What force does every one exert on the other after someone moves the part

The galvanometer records a current , A galvanometer together with an unknow...

A galvanometer together with an unknown resistance in series is linked across two identical batteries each of 1.5V. whenthese batteries are connected in series the galvanometer rec

The basic capacitor, THE BASIC CAPACITOR If we have two metal plates cl...

THE BASIC CAPACITOR If we have two metal plates close together, but separated by an insulator or dielectric (which could be air) and we apply a voltage across them, electrons a

Dispersion of white light, production of pure spectrum

production of pure spectrum

Find the wavelength of the sound, A bat emits a sound whose frequency is 14...

A bat emits a sound whose frequency is 142 kHz. The speed of sound in air at 20.0°C is 343 m/s. However, the air temperature is 35°C, so the speed of sound is not 343 m/s. Find the