force used to lift a 25kg mass to a height of 24m in 5 sec does 2120J of work. Calculate the power.

A 1 kg apple sits on a table. What is the normal force of the table acting on the apple?

A ray of light passes from air into water with an angle of incidence of 30 o. Which of the following quantities does not change as the light enters the water ... a) Wavelength b) frequency c) speed of propagation d) direction of propagation.

Explain the difference between a fluorescence emission spectrum and a fluorescence excitation spectrum. which more closely resembles an absorption spectrum?

When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside called? A. Gravity B. Acceleration C. Centripetal force D. Mass

How many inches are in 100 yards

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?