A tennis ball launcher works by using a spring to propel the ball forward as shown in the picture.
One model of tennis ball launcher has advertised that it is capable of imparting 15,000 of
kinetic energy to a 0.5 kg ball initially at rest. A student carefully measures the compression of
the spring to be 0.10 m.
um
What is the elastic energy stored in the spring?*
(6 Points)

Which of the following is an example of units for speed

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx hurrim timed

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)