A box of mass m is pushed by force Fp at an angle θ along a frictionless surface. The box accelerates to the left. What is the magnitude of the normal force?

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.

Which is not true about oxygen-17 and oxygen-18?

What is the measure of a change in an objects velocity?