A water wave passes a boat. An observer on the boat notices that 120 water waves pass the boat in a time of 1 minute. The boat is at anchor (it is not moving). a Calculate the frequency of the water waves in hertz, Hz.

b The water waves have a wavelength of 1.8 m. Calculate the wave speed of the water waves.

A. to determine if humans can explore mars safely

Because the sun is the biggest and if the sun orbits the earth we will be dead probably

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

//(b) both involve the use of levers;