How much work is done by moving a 20kg object 20m using a force of 100 newtons parallel to the direction of motion?

The necleus of an atom is made up of what subatomic particles?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.