If the sound waves frequency is 1,000 Hz, and it travels with a wavelength of 0.05 What is the Velocity of the wave?
340 m/s
100 m/s
20,000 m/s
50 m/s

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

This is the number of complete movements of a wave per second.