What are the two criteria necessary for a substance to be considered a magnet

A truck is traveling north and a car is traveling west calculate momentum

The earth can be considered as a single-conductor capacitor. It can also be considered in combination with a charged layer of the atmosphere, the ionosphere, as a spherical capacitor with two plates, the surface of the earth being the negative plate.

In what changes of state do atoms lose energy? Check all that apply

How fast should the platform move, vp, for the person to detect a beat frequency of 7.00 hz? take the speed of sound to be 344 m/s. express your answer numerically in meters per second using three significant figures. hints?

Which of these is a mixture? calcium carbon dioxide salt water potassium

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.

A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it? Question 3 options: 3.4 m 0.77 m 3.9 m 0.29 m

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes