1. It is observed that most of the galaxies in the universe are moving away from our system reference. The Sombrero Galaxy is emitting light with a wavelength
700 nm. a) If the galaxy is moving away with a speed of 90,000 km / s, what is the
perceived frequency on Earth? b) If the galaxy is approaching with a speed of
90000 What is the perceived frequency on Earth?

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

Which articulations allow for greatest range of motion?