Which of the following forms of electromagnetic waves is used mostly in communication?

a) x-rays

b) infrared

c) radio waves

d) gamma rays

Imagine that you have a 6.50 l gas tank and a 4.50 l gas tank. you need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.

When objects collide the total initial momentum equals the final momentum is called?

Which of the following is/are the best example (s) of elastic collision (s) ? Explain why you chose your answer (s). (A) A collision between two billiard balls. (B) A collision between two automobiles. (C) A basketball bouncing off the floor.

How can the rate of a reaction be increased? (A) increasing the temperature (B) having a lower concentration of reactants (C) having less surface area (D) decreasing the amount of reactants

A body has an initial velocity of 12 m s^-1 and is brought to rest over a distance of 45 m. What is the acceleration of the body?

The Pony Express was a mail delivery system in the Old West that used a series of men on horseback to deliver mail from St. Joseph, MO to Sacramento, CA along a trail that was 2000 miles long.

In the virtual lab, calculations were made of the predicted diffraction angle, using the formula θ ≈ StartFraction lambda over L EndFraction.

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?