When there is a 5.00 A current 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
B
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Why is the sky blue (on Earth)?
A) because molecules scatter blue light more effectively than red light B) because the Sun emits mostly blue light C) because molecules scatter red light more effectively than blue light D) because deep space is blue in color E) No one knows; this is one of the great mysteries of science.
Belt and zone circulation
a. occurs on Jupiter. b. occurs on Saturn c. is caused by rising and sinking gases. d. is more obvious on Jupiter than on Saturn. e. All the above
How many types of quarks are there, and how many types of antiquarks?
A.) 24 quarks and 24 antiquarks. B.) 12 quarks and 6 antiquarks. C.) 6 quarks and 6 antiquarks. D.) 3 quarks and 3 antiquarks. E.) 30 quarks and 0 antiquarks.
Slanting Surfaces With Friction: A 6.0-kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.40, at what rate does the box accelerate down the slope?
A. 3.1 m/s2 B. 3.4 m/s2 C. 3.7 m/s2 D. 4.1 m/s2