A refrigerator operating in a room

A. warms the room
B. cools the room
C. has no effect on the room
D. removes water vapor from the room


Answer: C. has no effect on the room

Physics & Space Science

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Intensity: About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away. Use this information to estimate the average power output of the sun.

A. 1 × 1026 W B. 2 × 1026 W C. 3 × 1026 W D. 4 × 1026 W

Physics & Space Science

When dark energy is thrown into the mix, present observational data seem to indicate that the universe will ________

Fill in the blank(s) with correct word

Physics & Space Science

A 4.0 ?F capacitor is charged to 6.0 V. It is then connected in series with a 3.0 M? resistor and connected to a 12. V battery. How long after being connected to the battery will the voltage across the capacitor be 9.0 V?

A) 5.5 s B) 8.3 s C) 11. s D) 12. s E) 17. s

Physics & Space Science

A satellite near Earth makes a full circle in about 90 minutes. Much farther from Earth, say at the distance to the Moon, time for a full circle would be

A) 90 minutes. B) less than 90 minutes. C) about 28 days. D) not enough information E) none of the above

Physics & Space Science