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

When a tuning fork is struck, it produces sound waves of wavelength 114 cm which travel at 343 m/s through air. What is the frequency of the tuning fork? Choose one answer. a. 300 Hz b. 392.16 Hz c. 3.33 x 10⁻³ Hz d. 3.01 Hz

Twenty students were surveyed to find out how many hours of tv they watch during a school week

Cecelia dropped a ball from a height of 2 m. The ball fell in a straight path down to the ground According to Newton's universal law of gravitation, which would change the path of the ball so it traces out the widest curved path possible?

Describe what is happening to a car with a negative slope on a graph of speed versus time.

Which one requires more work walking 1 mile running 1 mile

Ursa Minor contains the pole star, Polaris, and the asterism known as the Little Dipper. From most locations in the Northern Hemisphere, all of the stars in Ursa Minor are circumpolar.

What is an organism ability to maintain a steady internal condition called

What is the fundamental frequency of a particular medium?. a. the lowest frequency at which a standing wave is possible. b. the highest frequency at which s standing wave is possible

The distance from the inner core to the surface of the earth is about 5,200 kilometers. the large amount of material surrounding the inner core places tremendous pressure on it.

What type of wave is sound? longitudinal light surface transversal