Which of the following statements does not describes the similarity between soaps and detergents?
A) They have a polar ionic end and a long nonpolar tail.
B) Both dissolve oils.
C) Both are synthetic.
D) Both are biodegradable.
E) Both are made from fatty acids.
Answer: E
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The effect of de-forestation on the ozone layer problem is
A) that it worsens the problem only if the wood is burned. B) that it actually helps reduce the problem. C) that it worsens the problem regardless of whether the wood is burned. D) essentially zero.
Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,
a. it has the same position and velocity as ball B. b. it has the same position and acceleration as ball B. c. it has the same velocity and acceleration as ball B. d. it has the same displacement and velocity as ball B. e. it has the same position, displacement and velocity as ball B.
Which of the natural forces bind atomic nuclei?
a. Newtonian force b. gravitational force c. weak force d. electromagnetic force e. strong force
A 2.00 kg hollow sphere of radius 6.00 cm starts from rest and rolls without slipping down a 10.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the hollow sphere at the bottom of the incline is
A. 1.51 
B. 1.47
C. 1.22
D. 1.01
E. 1.95