How can you tell something is matter?

The average speed of a runner in a 400 meter race was 8.0 meters per second how long did it take the runner to complete the race

An air-filled pipe is found to have successive harmonics at 800 {/rm Hz}, 1120 {/rm Hz}, and 1440 {/rm Hz}. It is unknown whether harmonics below 800 {/rm Hz} and above 1440 {/rm Hz} exist in the pipe. What is the length of the pipe?

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. what type of eruption probably formed this rock?

When waves are closely spaced together, how would you describe the pitch that you hear? question 18 options: the same as when waves are spaced far apart high low?

Divers change their body position in midair while rotating about their center of mass. In one dive, the diver leaves the board with her body nearly straight, then tucks into a somersault position.

A solid spherical insulator has radius r = 2.5 cm, and carries a total positive charge q = 8 * 10-10 c distributed uniformly throughout its volume. find the magnitude of the electric field |e| at a radius of 5 cm from the origin (i. e.

What are some things cyclists do to reduce friction?

What is used to find true north on a compass? a. equator c. magnetic declination b. prime meridian d. cardinal directions

How does the sun's heat affect the humidity of a place

Which "spheres" are interacting when water evaporates from plants