Calculate the period of wave whose frequency is 50Hz

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?