Indirect detection of an extrasolar planet means ________
A) seeing the planet with the naked eye B) sending a space probe to the planet
C) acquiring images or spectra of the planet D) observing the planet's effect on its host star
D
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A piano string of density 0.0050 kg/m is under a tension of 1350 N. Find the velocity with which a wave travels on the string
a. 260 m/s b. 520 m/s c. 1040 m/s d. 2080 m/s e. 4160 m/s
An ideal Carnot engine is operated as a heat pump to heat a room in the winter. The heat pump delivers heat to the room at the rate of 47 kJ per second and maintains the room at a temperature of 293 K when the outside temperature is 237 K
The power requirement to run the heat pump under these operating conditions is closest to A) 9000 W. B) 7100 W. C) 20,000 W. D) 15,000 W. E) 11,000 W.
Process of Science: The idea of quantum tunneling seems very counterintuitive. However, there is considerable evidence to support it. Describe one such line of evidence
What will be an ideal response?
The highest tides occur when
A) the Sun and the Moon are on the same side of Earth. B) the Sun and the Moon are on opposite sides of Earth. C) the Sun, Moon, and Earth form a right-angled triangle with Earth at the 90° vertex. D) the Sun, Moon, and Earth form a right-angled triangle with the Moon at the 90° vertex. E) the Sun, Moon, and Earth form a right-angled triangle with the Sun at the 90° vertex.