All the planets move about the Sun in randomly oriented orbits.
Answer the following statement true (T) or false (F)
False
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A red crab crawling very deep in the water where sunlight is very dim appears
A) red. B) orange. C) cyan. D) brown. E) black.
A battery has an internal resistance of 4.0 ?. Which of the following load resistors would have the most power delivered to it when connected across the battery?
a. 1.4 ? b. 2.0 ? c. 4.0 ? d. 8.0 ? e. 16 ?
If a length of lucite that is being used as a light pipe gets wet, the critical angle
A) decreases. B) is unaffected. C) doubles. D) is meaningless since lucite cannot be used as a light pipe. E) increases.
How much energy (in eV) does a photon of 500-nm light have? (h = 6.63 × 10^-34 J×s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^-19 J, and 1 nm = 10-9 m)
a. 1.78 eV c. 1.24 eV b. 2.48 eV d. 3.11 eV