Do birds vocalize at higher pitch in noise, or is it a matter of measurement?

What was the most significant accomplishment of the apollo program? a. building the first space station b. sending a probe to study the sun c. landing an astronaut on the moon d. sending the first astronaut into space

A mesocyclone is an important part in which storm system? A. Midlatitude Cyclone B. Thunderstorm C. Tropical cyclone D. Tornado

25 miles/hour represents a

Which best describes the differences between how Ptolemy and Copernicus described the solar system? A. Ptolemy saw the sun at the center of the solar system, while Copernicus saw the earth as the center. B.

Describe two examples of activities that you do where you depend on friction, and would not be able to do them without friction.

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?

The period of a simple pendulum is 3.8 s. the length of the pendulum is doubled. what is the period t of the longer pendulum? t = s

True or false - sound waves can travel across outer space.