An object is oscillating on a spring with a period of 4.60 s. at time t = 0.00 s the object has zero speed and is at x = 8.30 cm. what is the acceleration of the object at t = 2.50 s?

Air enters a compressor operating at steady state at 1.05 bar, 300 k, with a volumetric flow rate of 93 m3/min and exits at 12 bar, 400 k. heat transfer occurs at a rate of 15.5 kw from the compressor to its surroundings. assuming the ideal gas model for air neglecting kinetic potential energy effects, determine the power in put in kw.

In a system, when potential energy decreases, then entropy also decreases. true false

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?