Which of the following colors are part of the visible spectrum?

A. violet

B. blue

C. red

D. all of these

What is the acceleration due to gravity on mars

This is one of the four planets Mercury, Venus, Earth, and Mars, whose orbits lie nearest the Sun

An object of mass 30kg is in free fall in a vacuum where there is no air resistance. Determine the acceleration of the object.

If an atom has two electrons outside of its nucleus, what number of protons and neutrons must be contained in the nucleus to result in a neutral atom? A. 2 protons, 2 neutrons B. 1 proton, 1 neutron C. 1 proton, 3 neutrons D. 4 protons, 4 neutrons

A 130 kg block is pulled at a constant speed of 9.0 m/s across a horizontal floor by an applied force of 102 kg directed 37° above the horizontal. what is the rate at which the force does work on the block?

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite