An electric device delivers a current of 5.0 A to a device. How many electrons flow through this device in 10 s? (e = 1.60 × 10-19 C)
A) 0.20
B) 20
C) 2.0
D) 3.1 × 1020
E) 31 × 1020
D
Physics & Space Science
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Which object has zero acceleration?
A) one at rest B) one moving at constant velocity C) one in mechanical equilibrium D) all of the above E) none of the above
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A 1.00-m3 object floats in water with 20.0% of its volume above the waterline. What does the object weigh out of the water? The density of water is 1000 kg/m3
A) 1,960 N B) 11,800 N C) 7,840 N D) 9,800 N
Physics & Space Science
Escape speed from Mars is
A) about the same as from Earth. B) greater than from Earth. C) less than from Earth.
Physics & Space Science
The longer a given diameter of wire, the higher its resistance
Indicate whether the statement is true or false
Physics & Space Science