A 20-g bullet moving at 1000 m/s is fired through a one-kg block of wood emerging at a speed of 200 m/s. What is the kinetic energy of the block that results from the collision if the block had not been moving prior to the collision and was free to move?
a. 10 kJ
c. 0.16 kJ
b. 9.8 kJ
d. 0.13 kJ
D
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An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 20.0 degrees. The narrow section is 15.0 m from the wide section and the narrow section is lower than the wide section. The velocity of the fluid in the wide section of the pipe is 6.00 m/s and the velocity of the fluid in the narrow section of pipe is 9.00 m/s. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1,000 
A. 228 kPa B. 203 kPa C. 195 kPa D. 167 kPa E. 145 kPa
Why does Saturn radiate even more excess energy than Jupiter?
A) Saturn is still radiating heat left over from its formation. B) Saturn's thick cloud layer contributes to a larger Greenhouse Effect. C) Helium rain gives off heat as it differentiates toward Saturn's center. D) Saturn's atmosphere contains much methane, creating a large Greenhouse Effect. E) Saturn can fuse hydrogen into helium in its core, like the Sun.
An automobile with a mass of 2000 kg is moving north on a level, straight highway with a constant velocity of 80 km/h. What is the unbalanced force acting on the automobile?
Indicate whether the statement is true or false
Two cars go around a banked curve at the proper speed for the banking angle. One car has tires with excellent traction, while the other car has bald slippery tires
Which of these cars is more likely to slide on the pavement as it goes around the curve? A) the car with the new tires B) the car with the bald tires C) Neither car will slide. D) It depends on if the pavement is wet or dry.