A runner starts from rest and with an acceleration of 1.0 
travels a distance of 10 meters. The time it takes the runner to cover the distance is
A. 6.3 s.
B. 5.7 s.
C. 5.0 s.
D. 4.5 s.
E. 3.8 s.
D. 4.5 s.
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A steel hanger with solid cross section has horizontal force P 5 5.5 kN applied at free end D. Dimension variable b 5 175 mm and allowable normal stress is 150 MPa. Neglect self-weight of the hanger. The required diameter of the hanger is approximately:
(A) 5 cm
(B) 7 cm
(C) 10 cm
(D) 13 cm
What, approximately, are the dimensions of the smallest object on Earth that the astronauts can resolve by eye at 200 km height from the space shuttle? Assume ? = 500 nm light and a pupil diameter D = 0.50 cm. Assume eye fluid has an average n = 1.33.
A. 150 m B. 100 m C. 250 m D. 25 m E. 18 m
Where does the chemical reaction known as "respiration" occur?
A) at many points all over your body B) in the lining of your lungs C) in the air while it is being held in your lungs D) in living plants E) in your nose
Consider two copper wires. One has twice the length of the other. How do the resistances of these two wires compare?
A) Both wires have the same resistance. B) The longer wire has half the resistance of the shorter wire. C) The longer wire has twice the resistance of the shorter wire. D) none of the given answers