Clovis wants to lose weight. Clotilde tells him that he will be thin enough for her if he travels past her at 0.600 c. If the distance she sees from the front of his stomach to his back is then 24.0 cm, what distance in cm does she see when he is standing still?
a. 15.4
b. 19.2
c. 24.0
d. 30.0
e. 37.5
D
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One light-year is the distance light travels in one year. The speed of light is about 300,000 km/s (3 × 105 km/s). How far is 1 light-year?
A) 3 × 105 km B) 1.8 × 107 km C) 1.08 × 109 km D) 9.46 × 1012 km
A building made with a steel structure is 650 m high on a winter day when the temperature is 0° F. How much taller (in cm) is the building when it is 100° F? (The linear expansion coefficient of steel is 11 × 10^?6 (°C)?1.)
a. 71 b. 36 c. 40 d. 46 e. 65
When you stretch a rubber band, you are applying
A) compressional stress. B) tensional stress. C) shear stress. D) simple stress.
Salt water has greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force exerted on the boat by the water greater?
A) in salt water B) in fresh water C) The buoyant force is the same in both cases.