What are the cracks between the plates of the lithosphere called

The alternative to nuclear fission reactors in a nuclear fusion reactor. Explain why it is much more difficult to get a fusion reactor to work. So far there are2 types of confinement systems used.

Wegener named the supercontinent Pangaea, which means

A speed boat is traveling at 100km/hr. How many hours will it take for the speed boat to cover a distance of 115 km?

Laser light of wavelength lambda passes through a thin slit of width a and produces its first dark fringes at angles of + / - 30 degree with the original direction of the beam. The slit is then reduced in size to a circle of diameter a.

At a certain location the horizontal component of the earth's magnetic field is

A ball thrown straight upwards with an initial velocity of 15 m/s. Calculate how long the ball will remain in the air and the maximum height the ball reaches?

What is the upward force of the floor on the toes of one foot?

What is the difference between nuclear energy and light energy?

Two stars, x and y, have the same temperature. star x is ten times more luminous than star y. which star has the larger radius

If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is A. mg/2 B. mg C. 2mg D. 4mg