What are some examples of enclosed spaces?
What will be an ideal response?
Enclosed spaces can be rooms, halls, inside auditoriums, furnaces, boilers,
insides of many heat exchangers, and small containers or boxes, such as the
tower of a personal computer.
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Which of the following correctly lists the terrestrial worlds in order from the most atmospheric gas to the least? (Mercury and the Moon are listed together since their atmospheres have very similar amounts of gas.)
A) Venus, Earth, Mars, Mercury/Moon B) Earth, Venus, Mars, Mercury/Moon C) Mars, Venus, Earth, Mercury/Moon D) Venus, Mars, Mercury/Moon, Earth
A person gazes at a very distant light source. If she now holds up two fingers, with a very small gap between them, and looks at the light source, she will see
A) a series of bright spots. B) the same thing as without the fingers, but dimmer. C) a hazy band of light varying from red at one side to blue or violet at the other. D) a sequence of closely spaced bright lines.
A 1000-kg barge is being towed by means of two horizontal cables. One cable is pulling with a force of 80.0 N in a direction 30.0° west of north
In what direction should the second cable pull so that the barge will accelerate northward, if the force exerted by the cable is 120 N? Assume that the water exerts no appreciable frictional drag on the barge. A) 47.5° east of north B) 19.5° east of north C) 39.0° east of north D) 21.1° east of north E) 54.7° east of north
A fully charged parallel-plate capacitor remains connected to a battery while a dielectric is slid between the plates. Does E between the plates increase, decrease, or stay the same?
1.increase 2.decrease 3.remains the same