The dark dust clouds can be explored better with infrared than with visible light
Indicate whether the statement is true or false
TRUE
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Why is the cosmic microwave background (CMB) so cold if the early universe was so hot?
a. Enough time has passed for matter in the universe to release enough heat to cool down. b. The CMB constantly interacts with atoms, which effectively cool down the photons. c. The expansion of the universe has redshifted those photons to an effectively cooler temperature. d. Misleading; The Big Bang was initially hot but the CMB was released from cold material much later on.
This photo shows a single star photographed by the Hubble Space Telescope. Why doesn't the star appear as a single, sharp point of light?
A) The wave properties of light make this type of blurring an unavoidable feature of any telescope. B) We are seeing a planetary system around the star. C) The image of the star is overexposed. D) The telescope was not properly focused when it took this photo.
On average, elliptical galaxies are much older than large spiral galaxies
Indicate whether the statement is true or false
A 6.0-?F air-filled capacitor is connected across a 100-V potential source (a battery). After the battery fully charges the capacitor, it is left connected and the capacitor is immersed in transformer oil, which has a dielectric constant of 4.5
How much additional charge flows from the battery onto the capacitor during this process? A) 1.2 mC B) 2.1 mC C) 2.5 mC D) 1.7 mC