A 5-kg fish swimming at a speed of 1 m/s swallows an absent-minded 1-kg fish swimming toward it at 4 m/s. The speed of the larger fish after lunch is
A) 1/2 m/s.
B) 1/5 m/s.
C) 1/6 m/s.
D) 2/3 m/s.
E) 3/2 m/s.
C
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Which one of the following concerning stalactites and stalagmites is not true?
a.) Stalagmites form on the floors of caves below the water table. b.) Stalactites are deposited from water dripping from the ceiling of an aerated cavern. c.) Both are composed of calcium carbonate. d.) Both are forms of dripstone; stalactites hang from the ceiling, stalagmites grow upward from the cavern floor.
The safety factor of a slope is:
a. the ratio of the shear stress to shear strength b. the ratio of the normal stress to the tangential stress c. the ratio of the driving forces to the resisting forces d. the ratio of the resisting forces to the driving forces
The total amount of atmospheric water remains nearly constant
Indicate whether the statement is true or false
Which of the following ocean currents is critical in maintaining the average winter temperatures in Great Britain and Norway, and keeping them from being much colder?
A. North Atlantic Drift B. North Equatorial Current C. Canary Current D. Labrador Current