What might you detect with an X-ray telescope that you could not detect with an infrared telescope?

What will be an ideal response?


Hot gas heated by exploding stars and black holes.

Physics & Space Science

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Suppose that the Department of Energy develops a new reversible engine that has a coefficient of performance (COP) of 4.0

when operated as a refrigerator and a COP of 5.0 when operated as a heat pump. What is its thermal efficiency when operated as a heat engine doing work? A) 20% B) 10% C) 45% D) 80% E) 25%

Physics & Space Science

Andrea and Chuck are riding on a merry-go-round. Andrea rides on a horse at the outer rim of the circular platform, twice as far from the center of the circular platform as Chuck, who rides on an inner horse. When the merry-go-round is rotating at a constant angular speed, Andrea's angular speed is

1.twice Chuck's. 2.the same as Chuck's. 3.half of Chuck's. 4.impossible to determine.

Physics & Space Science

During the volcanic eruption of Mt. Pelee in 1902, an incredibly hot "burning cloud" rolled down the mountain and incinerated the town of Saint-Pierre. From the damage done, the temperature in the cloud was estimated at 700°C. If the air temperature

was 20°C and a mole of air is 29 grams, estimate the molecular weight of the gas in the "burning cloud" that made it heavier than the surrounding air. (As a follow-on, estimate the most probable composition of the cloud. Some typical volcanic gases are H2S, SO2, H2SO4, CO2, NO.)

Physics & Space Science

How fast must something be traveling if its mass increases by 10%?

What will be an ideal response?

Physics & Space Science