An element is a substance composed of atoms that all have the same number of protons.

A. True

B. False

Resistance of a light bulb with 0.33 A of current flowing from a 12V battery?

What is the mass of an object if the force of 17 n causes it to accelerate at 1.5 m/s/s?

A balloon is buoyed up with a force equal to the A) weight of air it displaces. B) density of surrounding air. C) atmospheric pressure. D) weight of the balloon and contents.

Two forces oppose each other while a star is stable. The first is gravity pulling inward. What is the other force?

When a ceiling fan rotating with an angular speed of 3.56 rad/s is turned off, a frictional torque of 0.105 n⋅m slows it to a stop in 31.3 s?

Two identical objects are moving directly toward one another at the same speed v. ~v - ~v m m What is the total kinetic energy of the system of the two objects?

Why would a long series of gradual ramps be better than one short, steep ramp for moving heavy blocks of stone?

Why are some liquids more viscous than others?

If a person weighs 125 lbs, 8oz., how many mg does s/he weigh

An iron rod is: A:a good conductor of heat and electricity, but not magnetic B: magnetic and a good conductor of heat, but is an insulator of electricity C: magnetic and a good conductor of heat and electricity D: not magnetic and an insulator of