Mechanical waves use matter to transfer energy.

What kind of eclipse takes place when the moon passes between earth and the sun and completely covers the sun?

Question 1 Unsaved Most of the mass of the solar system is located in which of the following? Question 1 options: Earth comets sun Jupiter

Until the late 1800s, which of the following sources was used to heat most homes? fossil fuels electricity biomass solar energy

A small charged bead has a mass of 1.0 g. It is held in a uniform electric field of magnitude E = 200,000 N/C, directed upward. When the bead is released, it accelerates upward with an acceleration of 20 m/s2. What is the charge on the bead?

Once a satelite has entered a stable orbit round earth why does it not need fuel?

Assume that a friend hands you a heavy book to hold as he turns the combination lock on his locker. Which of you does more work?

A tube, open at only one end, is cut into two shorter (nonequal) lengths. The piece that is open at both ends has a fundamental frequency of 422 Hz, while the piece open only at one end has a fundamental frequency of 666 Hz.

Table tennis the path of a table-tennis ball after being hit and hitting the surface of the table can be modeled by the function h=-4.9t (t-0.42) where h is the height in meters above the table and t is the time in seconds.

A coat rack weighs 65.0 lbs when it is filled with winter coats and 40.0 lbs when it is empty. The base of the coat rack has an area of 452.4 in2.

An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time?