The principal landform resulting from a stream's erosive power is its ______________-shaped valley
Fill in the blank(s) with correct word
V
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Components: If a vector pointing upward has a positive magnitude, a vector pointing downward has a negative magnitude.
A. True B. False
In Ptolemy's view of the universe, a planet moves on an epicycle whose center moves around the Earth on the deferent circle
a. Correct
b. FALSE; Ptolemy put the Sun at the center.
c. FALSE; The planet stays on the deferent circle.
d. FALSE; The Earth is at the center of the epicycle.
e. FALSE; Both c and d are correct.
When 5.00 A is flowing through an 10.0-? device, how much power is being dissipated in the device?
A) 50.0 W B) 250 W C) 500 W D) 2.50 kW
A 100 lb sack of potatoes falls from an airplane. As the velocity of fall increases, the air resistance also increases. When air resistance equals 100 lb, the acceleration of the sack will be ____ m/sec/sec
a. 0 b. 16 c. 32 d. 9.8 e. 24