how many revolutions are completed by a top spinning with a constant angular velocity of 3pi radians during a 20 sec time interval

Calculate How much energy is transferred as useful energy =A 98% efficient kettle that has a total input of 2000J

You are located in the continental U. S. on the first day of October. How will the position of the Sun at noon be different two weeks later? a. It will have moved toward the North. b. It will have moved to a position higher in the sky. c.

Why is too much exposure to ultraviolet radiation dangerous

1. Household circuits are often wired with two different widths of wires: 12-gauge and 14-gauge. The 12-gauge wire has a diameter of 1/12 inch while the 14-gauge wire has a diameter of 1/14 inch.

Along with X-Rays, which high frequency EM waves can be used to destroy cancer cells? * Radio Microwave Infrared Gamma

Which of the outer planets are most like Earth? How?

The pressure inside a champagne bottle can be quite high and can launch a cork explosively. Suppose you open a bottle at sea level. The absolute pressure inside a champagne bottle is 6 times atmospheric pressure; the cork has a mass of 7.

Using a cathode ray tube, Thomson confirmed that atoms must have an overall positive charge. atoms are made of particles that have a negative charge. electrons in atoms must have varying amounts of energy. electrons are only found in the nucleus.

A ball is rolled along the inside of a partial hoop lying flat on a table. which path will the ball follow when it gets to the end of the hoop?

What pattern of material movement found in the Earth system tracks how an element moves from living to nonliving parts? a. rock cycle b. calcium cycle c. carbon cycle d. none of the above