4. Pendulum has a m 1.0 kg, L 2.0 m, g 9.8 m/s?, and to -40 degrees. What is the maximum velocity of this pendulum? Show your work. (Hint: The exact height of the
pendulum is now 0.468 m.)

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Asatellite with an orbital period of exactly 24.0 h is always positioned over the same spot on earth. this is known as a geosynchronous orbit. television,communication, and weather satellites use geosynchronous orbits. at what distance would a satellite have to orbit earth in order to have a geosynchronous orbit?