The center of our galaxy contains a very intense source of radio and X-ray radiation named Sgr A. What is it about this source that supports the idea that the radiation comes from a black hole?
a. The radiation is strongly blueshifted, indicating that the object is collapsing.
b. The radiation is strongly redshifted indicating that the object is growing.
c. The radiation is coming from an incredibly small object.
d. Radio waves can only be produced by matter orbiting a black hole.
e. Only radiation from a black hole could penetrate the giant molecular clouds between Sgr A and Earth.
Question 2
According to the inverse square law, the force due to gravity between two masses will ____.
a. increase as the distance between the two masses increases
b. decrease as the square of the distance between the two masses increases
c. cause the two masses to move away from each other
d. cause the two masses to move in a straight line
e. cause the two masses to orbit each other
Radio
Radio Telescope Used for SETI
Darwin’s finches: Adaptive radiation of bill types.
Changes in Radiation-Absorbing Gases
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potatoes as a very good source of vitamin B6