Why do gamma ray telescopes have poor angular resolution?
What will be an ideal response?
Because scientists have not yet developed a way to focus these.
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__________is the stage in the early history of the Universe when ultraviolet photons from the first stars ionized the gas filling space
A) Unionization B) Replication C) Recombination D) Reionization
How did Harlow Shapley use the period-luminosity relationship of RR Lyrae variables to determine the size of the Milky Way galaxy?
a. He determined the proper motion of globular clusters in the outer disk of the galaxy. b. He found the distances to individual variables free floating in the halo. c. He found the distances to open clusters found throughout the disk of the galaxy. d. He found the distances to globular clusters distributed about the center of the galaxy.
Two organ pipes are meant to be the same length, but apparently they are not. When played simultaneously the beat frequency heard is 2.4 Hz. If the fundamental frequency of the first pipe is 228 Hz, by what fraction is the first pipe different in length than the second?
A. 2% B. -2% C. -1% D. Impossible to determine E. 1%
When a car comes to a stop its kinetic energy is converted to internal energy in its brakes, heating them up
a. True b. False Indicate whether the statement is true or false