1. If you double the frequency of wave with a 10 s period, what is be the new period (in seconds)? 2. What is the frequency (in Hz) of a heart's oscillations when beating at 72 beats per minute?

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.

How do you tell if someone actually cares about you? and just say they do?

Who was the first scientist to measure speed as distance over time?