In people who are nearsighted the lens in their eye focuses the image in front of the retina. Do nearsighted people need glasses with converging lenses or diverging lenses?
A. converging
B. diverging
C. depends on the person
B. diverging
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A 60.0-kg person rides in elevator while standing on a scale. The elevator is traveling downward but slowing down at a rate of 2.00 m/s2. The reading on the scale is closest to
A) 708 N. B) 469 N. C) 589 N. D) 120 N. E) 349 N.
The oldest Earth rocks so far discovered and dated are _____
A) amethyst crystals B) rhodonite crystals C) zircon crystals D) turquoise crystals
This diagram represents the life track of a 1 solar-mass star from its pre-main-sequence stages to just before its final death. Refer to the life stages labeled with roman numerals. During which stage does the star have an inert (nonfusing) carbon core surrounded by shells of helium and hydrogen fusion?
A) Stage ii B) Stage iii C) Stage iv D) Stage vi E) Stage viii
A 5-kg piece of lead (specific heat 0.03 cal/g/°C) having a temperature of 80°C is added to 500 g of water having a temperature of 20°C. What is the final equilibrium temperature (in °C) of the system?
a. 79 b. 26 c. 54 d. 34 e. 20