A student used a coiled child's toy to show the class about sound waves. What kind of waves did he demonstrate? A. compression
B. radio
C. light
D. x-ray

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

Which of the following best describes the circuit shown below?

Name three populations commonly found in a prairie system