The Planet Tatooine has 1/2 the gravitational field strength and 4 times the mass of the Earth. How does the radius of Tatooine compare with the radius of Earth?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

What happens when you slowly pulled the carboard?