An object that might impact a planet label and describe the object

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

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.

Ain is , is 's of ? 0.62 0.79 1.27 1.50