The frequency of a sound wave determines

a. the pitch of the sound.

c. how fast the sound travels.

b. how loud the sound is.

d. the magnitude of the compression.

What kind of wave supports that the universe is expanding?

A space probe is fired as a projectile from the earth's surface with an initial speed of 2.44 104m/s. what will its speed be when it is very far from the earth? ignore atmospheric friction and the rotation of the earth.

How does the force required to lift an object in water compare to the force needed to lift the same object on land? It is the exactly the same for the same object. It can be either greater or less, depending on the object. It is more. It is less.

Science gives us A) answers to all our questions B) a way to investigate and learn C) new opinions D) all of these

Which of the following represents a chemical change to matter? A. digestion of food B. melting an ice cube C. shredding paper D. crushing an ice cube

Creates clouds, snow, sleet, rain and hail

Which type of radiation consists of a fast stream of negatively charged particles? a. alpha particles b. beta particles c. gamma rays d. positron particles

Range of motion is the distance an object can travel when separated from another object. T/F

If 500 thousand btus of energy are available to raise the temperature of a water boiler from 20°f to 100°f, how many gallons of water can be added to the boiler?

A woman pushes a 27 kg lawnmower at a steady speed. She exerts a 180 N force in a direction 31 degrees below the horizontal. The acceleration of gravity is 9.8 m/^2 Find the magnitude of the vertical force this lawnmower exerts on the lawn.