Magnetism is produced by the motion of electrons as they A. move around the nucleus. B. spin on their axes. C. both A and B D. none of the above

Use the collision theory to explain how increasing the temperature of a reaction will affect the rate of the reaction.

How does medium affect the level/amplitude of sound?

Which of these circuit schematics has an ammeter?

Explain that a universe is a large collection of billions of galaxies and is expanding continuously?

Juanita has done her experiment twenty times, and has gotten the same result every time. What would be the BEST thing for her to do to increase the validity of her results? A. Throw out her results and start over. B.

A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop? A) 36 m B) 72 m C) 140 m D) 210 m

Which of the following best explains why an explosive charge in a cannon can cause a cannonball to fly out of the cannon with a high velocity? A. because chemical potential energy can convert to gravitational potential energy B.

Distance divided by time what is velocity

The decay constant of a radioactive nuclide is 4.6 x 10^-3 s^-1. What is the half-life of the nuclide? 2.5 min 2.0 min 1.4 min 3.6 min 3.1 min

A furlong is an old british unit of length equal to 0.125 mi, derived from the length of a furrow in an acre of ploughed land. a fortnight is a unit of time corresponding to two weeks, or 14 days and nights.