Through which one of the following mediums is the velocity of a sound wave the greatest?

A. Lead

B. Water

C. Air

D. Steel

While playing her guitar, Karen plucks one string with increasing levels of force. What effect does this have on the sound produced? A The frequency of the sound keeps increasing. B The amplitude of the sound keeps increasing.

Most earthquakes occur in areas close to where tectonic plates meet. There are earthquakes in San Francisco. What can be concluded from this information? A) San Francisco is far away from an area where tectonic plates meet.

What type of wave can be seen by the human eye

Two tuning forks, 254 Hz. and 260. Hz, are stuck simultaneously. how many beats will be heard?

A velocity vs. time graph is shown. A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, velocity in meters per second on the y axis, numbered 0 to 20. A line starts at the origin and ends at (5, 20).

Two persons are applying forces on two opposite sides of a moving cart. The cart still moves with the same speed in the same direction. What do you infer about the magnitudes and direction of the forces applied?

SI unit of mass and gravity

What is the difference between porosity and permeability

In the diagram below, the planets' relative distances from the Sun are shown. The sizes of the planets are not drawn to scale.

Should athletes be benched if their grades are too low, or should they be allowed to play anyway?