A block attached to a spring undergoes simple harmonic motion in a horizontal frictionless surface. Its total energy is 50J. When the displacement is half the amplitude, the kinetic energy is

Select all the correct answers. which three statements about electromagnetic radiation are true?

Water flows through a garden hose which is attached to a nozzle. the water flows through hose with a speed of 2.19 m/s and through the nozzle with a speed of 19.8 m/s. calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed.

Which of the following best describes the shape of earth's orbit? a.ellipticalb.circularc.spirald.figure eight