When you touch a hot potato with your finger, energy flows
A) from your finger to the potato.
B) from the potato to your finger.
C) actually, both ways.
Answer: B
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A light-emitting diode has a power output of 0.3 W. If 590 nm is the average wavelength of the source, about how many photons are emitted per second? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 nm = 10?9 m)
a. 1021 b. 1025 c. 1018 d. 1029
Any object moving towards or away from the Earth will show a Doppler shift when observed from Earth
Indicate whether the statement is true or false
Why did the Oso landslide travel so far?
What will be an ideal response?
A moon is in orbit around its mother planet. Which of the following statements is always true about its kinetic energy (K), and its gravitational potential energy (U)?
A) K is negative, and U is negative. B) K is negative, and U is positive. C) K is positive, and U is negative. D) K is positive, and U is positive.