Why do you think that incandescent light bulbs are less efficient than fluorescent bulbs?

What is the crust of the earth made of

Explain how standing waves are produced? (Select all that apply.) HINT The waves must have the same speed, though the frequencies and wavelengths of each may be different. The waves must have the same frequency, amplitude and wavelength.

Which of the following is a characteristic differentiating tropical and temperate rainforests?. a ... the location. b ... the types of trees. c ... the average temperature. d ... all of the answers are correct.

A student wants to study the motion of an object that has a constant acceleration. Which of the following experiments could the student conduct to provide the best situations in which an object has a constant acceleration? Select two answers. A.

What is the surface temperature of a star that has a peak wavelength of 290 nm?

Why is raw sewage a major pollutant in some countries but not in developed countries?

What is the momentum of a 2 kg ball traveling at 2m/s

A constant force is exerted for a short distance on a block of mass that is initially at rest on a horizontal frictionless plane. This force gives the block a certain final speed v.

A football quarterback is moving straight backward at a speed of 3.00 m/s when he throws a pass to a player 20.0 m straight downfield. (a) if the ball is thrown at an angle of 25.

Simone is walking her dog on a leash. The dog is pulling with force of 34 N to the right and simone is pulling backward with a force of 16 N