Explain why if charge cannot be created or destroyed, electrically neutral objects can become electrically charged

Which is heavier-warm air or cold air?

How long does it take for the moon to rotate on its axis?

An ant is crawling along a straight wire, which we shall call the x axis, from A to B to C to D

Artesian wells rely on pressure to bring water to the surface.

Consider a platinum wire (σ = 1.0 * 107 Ω-1·m-1) with a cross-sectional area of 1 mm2 (similar to your connecting wires) and carrying 0.3 amperes of current, which is about what you get in a circuit with a round bulb and two batteries in series.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.

Balanced forces can change an object's direction. A. True B. False