Three resistors, 10 ?, 20 ?, and 30 ?, are wired in series and connected to a 120-V battery. How much current flows in the circuit?
2.0 A
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The figure below shows a single lens with two rays of white light incident on it from the left. Sketch the paths of the blue, yellow, and red components of each of these rays to the point where the light from the upper and lower rays would meet
What will be an ideal response?
A body is suspended from a spring hanging vertically. The body is then pulled downward so the spring stretches. Consider the change in the elastic potential energy (EPE) of the spring and the change in gravitational potential energy (GPE) as the body is pulled down.
A. The GPE decreases but the EPE is unchanged B. The EPE increases but the GPE is unchanged C. Both the GPE and the EPE decrease D. The GPE decreases while the EPE increases E. The GPE increases along with the EPE
Write the balanced chemical equation for the complete combustion of pentane, C5H12
The sun has apparent brightness B at the earth, which is 1.5 × 108 km away
What would be the apparent brightness of the sun at Pluto, which is 6.0 × 109 km from the sun? A) 0.063 B B) 0.00063 B C) 0.025 B D) 0.25 B