Which of the following statements about braking a car are true? (more than one)
a. the greater the kinetic energy of a car, the longer it takes for the car to stop.
b. the lower the kinetic energy of a car, the longer it takes for the car to stop.
c. if the speed of a car doubles, the car’s kinetic energy and braking distance quadruple.
d. if the speed of a car doubles, the car’s kinetic energy and braking distance remain the same.

Explain how plate tectonics have changed earth’s surface over time. include the role of plate tectonics in the creation of landforms.

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

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)