Which of the following is a renewable method of creating energy

a. a nuclear power plant

b. wind turbines in a field

What is the difference between electrically neutral objects and electrically charged objects

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.

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