Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (A), the distance Albert can throw a small rock
One albert is 92 meters How many square alberts is equal to one acre? (1 acre = 43,560 ft2 = 4050 m2)
1.29 A2
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Which one of the following statements is true?
A. Temperatures differing by 25? on the Fahrenheit scale must differ by 45? on the Celsius scale B. 40 K corresponds to ?40? C C. Temperatures which differ by 10? on the Celsius scale must differ by 18? on the Fahrenheit scale D. Water at 90? C is warmer than water at 202? F E. 0? F corresponds to ?32? C
The Paschen series is formed by electron transitions that
A) end on the n = 1 shell. B) begin on the n = 1 shell. C) end on the n = 2 shell. D) begin on the n = 3 shell. E) end on the n = 3 shell.
Which of the following is not a reason why telescopes tend to be built on mountaintops that are relatively far from cities and are in regions with dry climates?
A) The thin air on mountaintops makes the glass in telescope mirrors less susceptible to warping. B) Being on a high mountain top means being relatively high in the atmosphere, which tends to limit turbulence. C) Dry regions mean less rain and clouds, and mountaintops in dry regions may even allow some infrared observations. D) Mountaintops far from cities are generally subject to less light pollution than locations nearer to cities.
The discovery of dark energy increased support for the ________ universe
A) flat B) toroidal C) cylindrical D) hyperbolic E) spherical