Scientists believe the increase in disasters is due to a combination of natural and human-caused factors. List and describe at least one natural factor and one human-caused factor.

A turning fork produces a feeble sound. but when it is pressed against a table, a loud sound is heard. Why?

Which of the following charged particles will experience no magnetic force while in a magnetic field. A particle moving at a 90 degree angle to the magnetic field. A particle moving at a 45 degree angle to the magnetic field.

A piece of magnetic material that retains its magnetic properties after it is removed from a magnetic field.

Give several examples of a mechanism, machine or system that has two or more simple machines working together to complete work.

Calculate the final temperature when 50 ml of water at 80°c are added to 25 ml of water at 25°c.

A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends toward the normal, making an angle of 19° with it. The velocity of light in air is approximately 300,000 km/s.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters