The height of a helicopter above the ground is given by h = 2.95t3, where h is in meters and t is in seconds. at t = 1.95 s, the helicopter releases a small mailbag. how long after its release does the mailbag reach the ground?

J. j. thomson’s experiment disproved the theory that an atom

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)

Select all the correct answers.which two statements are true? a moving magnetic field creates an electric field.a constant magnetic field creates an electric field.a constant electric field creates a magnetic field.a moving electric field creates a magnetic field.resetnext