As the ball is going downwards
a. the velocity and acceleration both point up
b. the velocity points up and the acceleration down
c. the velocity points down and the acceleration up
d. the velocity and acceleration both point down
e. the acceleration is zero
D
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A force of 500 N is applied to a rod with a diameter of 4.00 mm. The stress in the rod is
a. 
b. 
c. 
d. 
e. 
While Galileo saw Saturn as a changing oval, the real nature of the rings was discovered by:
A) Halley. B) Newton. C) Lowell. D) Huygens. E) Cassini.
The density of aluminum is 2700 kg/m3. If transverse waves travel at in an aluminum wire of diameter what is the tension on the wire?
A) 65 N B) 39 N C) 52 N D) 78 N
In Moffat's article (Ref. 41), she quotes U.S. Department of Agriculture agronomist Rufus Chaney that it would cost "less than one-tenth the price tag for either digging up and trucking the soil to a hazardous waste landfill or making it into
concrete" to use plants for removing metal from contaminated soil. Suggest reasons why this approach should be so much less costly.