Suppose you want to observe and study the radiation from gas inside an interstellar bubble created by a supernova. Which of the following observatories will be most useful?

A) an x-ray telescope in space
B) a visible-light telescope on a mountain summit
C) an infrared telescope in space
D) the Hubble Space Telescope


A) an x-ray telescope in space

Physics & Space Science

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Identify the FALSE statement: The big bang theory states that:

initial changes happened within minutes and later changes occurred over millions of years. the temperature had to fall below one billion degrees to allow atoms to form. the process of atom creation, termed big bang nucleosynthesis, produced all known natural elements. as the Universe cooled, atoms and molecules accumulated in patchy clouds of gas called nebulae. nebulae condensed and heated to become spinning accretion disks, then protostars, then stars.

Physics & Space Science

A fuse or circuit breaker is placed in series with appliances as shown in this figure. Why not put it parallel to the appliances?

a. That would cause too much current into the appliances. b. It would work the same as putting them in series. c. The fuse or circuit breaker must be able to stop an excess current through the appliances by stopping the current through itself. d. It would have only half the current flowing through it if it were in parallel. e. It would waste electrical energy by being connected all the time that way.

Physics & Space Science

A car originally traveling at 30 m/s manages to brake for 5.0 seconds while traveling 125 m downhill. At that point the brakes fail. After an additional 5.0 seconds it travels an additional 150 m down the hill. What was the acceleration of the car after the brakes failed?

What will be an ideal response?

Physics & Space Science

How do we test our computer models for the interior of the Sun?

A) taking movies of the solar prominences and flares B) sending a probe to the Sun to plunge into its interior C) monitoring the helium content of the surface of the Sun D) comparing model predictions to how the Sun actually vibrates

Physics & Space Science