Question 4 2 pts
A roller coaster car (includes mass of occupants) is passing through a vertical loop.
The radius of curvature of the loop is 39 m. What would the minimum speed have to
be to make it around the loop safely?
v2
= gr

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?

The air that we breath is made mostly of which gaseous molecule

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)