What is required for a sound wave to be reflected?

Suppose the gravitational force between two masses is 10N. If the magnitude (numerical size) of each of the two masses double what is the new value of the new force between them. A. 5 N B. 20 N C. 40 N D. 10 N

Asteroids were recently formed by the collision and breakup of an object orbiting in the asteriod belt. a. True b. False

Which do you think changes the land more frozen water or flowing water?

Which is a binary star? Algol the Sun Alpha Centauri Polaris the Big Dipper

You are driving straight, travelling at 25 mph. You stomp on the brakes and come to a complete stop in a distance of 15 m.

To rid the body of wastes, including excess water and salts" is the purpose of what human body system? A) Digestive B) Excretory C) Skeletal D) Nervous

What's the transmission of heat requiring the movement of a liquid or a gas is?

Wich section of a business plan should come first but be written last?

Lemonade powder is stirred into water until it dissolves. Which are true statements? Check all that apply. A. Lemonade is the solute. B. Water is the solvent. C. Lemonade is the solvent. D. Water is the solute.

Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to produce to propel Nikolas if he wanted to accelerate at a rate of 1.