What's the one of the two requirements electric current

In which wavelength region (s) would we need to carry out observations in order to study the accretion disk around a white dwarf in a binary system?

A special system is set up in a lab that lets its user select any wavelength between 400nm and 700 nm with constant intensity. This light is directed at a thin glass film (n = 1.53) with a thickness of 350 nm and that is surrounded by air.

The radius of a conducting wire is doubled. What will be the ratio of its new specific resistance to the old one?

Discuss the formation of thunderstorms and tornadoes

A karate expert breaks a stack of bricks with his bare hand. If the force applied is 520 newtons and the impact time is 5.0 * 10-4 seconds, what is the value of impulse?

In which of the following wave types is the particle motion parallel to wave motion? A longitudinal wave B s wave C surface wave D transverse wave

State the molecular theory of magnetism

A 0.50 kg croquet ball is initially at rest on the grass. When theball is struck by a mallet, the average force exerted on it is240 N. If the ball's speed after beingstruck is 3.0 m/s, how long was the malletin contact with the ball?

What is the speed of a 0.145kg baseball if its kinetic energy is 109J?

A student travels from st. louis to indianapolis, a distance of 210 mi, in 7.0 h. the return trip over the same route takes 6.0 h. what is the average speed for