Vision Problems: A myopic (nearsighted) child wears contact lenses that allow her to have clear distant vision. The power of the lenses of her eyeglasses is -3.00 diopters. Without the corrective lenses, what is the far point of the girl?
A. 0.33 m
B. 0.25 m
C. 0.17 m
D. 0.42 m
E. 0.50 m
Answer: A
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The oldest easily identifiable fossils appear in sedimentary rocks that formed 3.4 billion years ago during the ____________________ period
Fill in the blank(s) with correct word
Conduction: A heat-conducting rod that is wrapped in insulation is constructed with a 0.15-m length of alloy A and a 0.40-m length of alloy B, joined end-to-end. Both pieces have cross-sectional areas of 0.0020 m2. The thermal conductivity of alloy B is known to be 1.8 times as great as that for alloy A. The end of the rod in alloy A is maintained at a temperature of 10°C, and the other end of the rod is maintained at an unknown temperature. When steady state flow has been established, the temperature at the junction of the alloys is measured to be 40°C, and the rate of heat flow in the rod is measured at 56 W. What is the temperature of the end of the rod in alloy B?
A. 80°C B. 84°C C. 88°C D. 92°C E. 96°C
Astronomers believe that many satellites of the Jovian planets were ________.
A. formed by collisions with other objects B. formed by fission C. formed from planetesimals orbiting the growing planet and accreting into larger bodies D. formed elsewhere in the Solar System and were later captured by Jupiter's gravitational pull
What is the typical size of most known asteroids?
A) a few meters B) a few kilometers C) a few hundred kilometers D) larger than the Moon E) larger than the Earth