The Milky Way and M31 in Andromeda both belong to the ________
Fill in the blank(s) with correct word
Local Group
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Carnot Engine: An ideal Carnot engine operates between a warm reservoir at 233 K and a colder reservoir. During each cycle, this engine extracts 15.0 J of heat from the warm reservoir and does 4.0 J of work. What is the temperature of the colder reservoir?
A. 171 K B. 62 K C. 47 K D. 67 K
From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 121.6 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 121.8 nm. What can we conclude?
A) The star is moving toward us. B) The star is moving away from us. C) The star is getting hotter. D) The star is getting colder. E) The "star" actually is a planet.
An athlete competing in the long jump leaves the ground with a speed of 9.14 m/s at an angle of 55° with the vertical. What is the length of the athlete's jump if air is of no significance?
A) 0.88 m B) 8.0 m C) 12 m D) 17 m E) 4.0 m
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What will be an ideal response?