The work-energy theorem states that the work done on an object is equal to a change in which quantity?

kinetic energy

displacement

potential energy

mass

A plane electromagnetic wave with wavelength 3.0 m, travels in free space in the+xdirection with its electric field vector~E, of amplitude 300 V/m, directed along they-axis. (a) What is the frequencyfof the wave?

A single covalent bond forms when two atoms do which of these?

What nation was forced by allied forces to make reparations?

In a solution of soda, the gaseous carbon dioxide is the solvent, and the liquid cola is the solute. True or false

Deimos, a moon of Mars, is about 12 km in diameter; it has a mass of 2 x 1015 kg. With what speed would you have to throw a baseball on Deimos so that it would go into orbit and return to you so you could catch it? 5.8 m/s 4.7 m/s 2.2 m/s 3.4 m/s

Different constellations are visible at different times of the year because of A) the relative motion between earth and the sun B) the relative motion between earth and the moon C) the celestial equator D) the celestial sphere

Why does alternating current change direction 50 to 60 times per second?

Tony uses the device shown in the diagram to model how an electromagnet is used in his uncle's scrap metal yard.

A flight attendant pulls a 60.0 N flight bag a distance of 239.0 m along a level airport floor at a constant speed. A 21.0 N force is exerted on the bag at an angle of 66.0 degrees above the horizontal. How much work is done on the flight bag?

A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water?