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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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).
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?
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
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.