A simple model of the hydrogen atom suggests that the electron orbits the proton. What is the

force that keeps the electron in orbit?

A. Electrostatic

B. Gravitational

C. Strong nuclear

D. Centripetal

A Christmas carousel changes what energy into what

What does balanced and unbalanced forces have to do with newtons laws of motion

Which of the following statements about radiation is true? A. Radiation is the only form of heat transfer that is not experienced on Earth. B. Radiation is the only form of heat transfer that can travel through the vacuum of space. C.

If 1.00 km^3 of air has a mass of 1.2x10^9 kg what is the density of air in g/cm^3

2. A sound wave in a steel rail has a frequency of 620 Hz and a wavelength of 10.5 m. What is the speed of sound in steel?

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect

When a raw egg gets heated into an edible egg is this considered a physical or chemical change?

Starting at its rightmost position, it takes 2 seconds for the pendulum of a grandfather clock to swing a horizontal distance of 18 inches from right to left and 2 seconds for the pendulum to swing back from left to right.

A question about a moral issue is answered by examining facts rather than opinions. is generally considered a scientific question. cannot be answered with scientific methods. cannot be debated through discussion.