A beaker is filled to the 500 ml mark with alcohol. What increase in volume (in ml) does the beaker contain when the temperature changes from 5° C to 30° C? (Neglect the expansion of the beaker, evaporation of alcohol and absorption of water vapor by alcohol.) ?alcohol = 1.12 × 10^?4/°C
a. 0.47
b. 0.93
c. 1.4
d. 1.7
e. 2.5
c
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According to their rotation curves, most spiral galaxies:
A) rotate as a solid body. B) rotate counterclockwise. C) have decreasing rotational speeds with increasing distance. D) contain dark matter. E) contain dark energy.
Two satellites are launched into circular orbits about the Earth. The one closer to the Earth has a period of 90 minutes. The one farther away will have a period which is ________ (longer than, shorter than, or the same as) 90 minutes.
Fill in the blank(s) with the appropriate word(s).
A man in a gym is holding an 8.0-kg object at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the object if his arm is held at 30° below the horizontal?
A) 22 N ? m B) 2.2 N ? m C) 4.4 N ? m D) 13 N ? m E) 37 N ? m
It is 23°F outside
a. What is the Celsius temperature? b. If this Fahrenheit temperature were doubled, what would the new Celsius temperature be?