Interstellar dust scatters _____________light more than _____________light
Fill in the blank(s) with correct word
blue; red
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A warm dust cloud in which stars are forming would be best observed with a(n) ________ telescope.
A. gamma-ray B. infrared C. optical (visible light) D. radio
A basketball player pushes down with a force of 50 N on a basketball that is inflated to a gauge pressure of 8.0 × 104 Pa. What is the diameter of contact between the ball and the floor?
A) 2.8 cm B) 1.4 cm C) 1.7 cm D) 2.1 cm E) 5.6 cm
An arrow is shot, from a bow, at an original speed of vo. When it returns to the same horizontal level, its speed will be
A) 9.8 vo. B) vo. C) 2 vo. D) 1/2 vo. E) 4 vo.
When a nucleus in an excited state decays to the ground state, a beta particle is emitted
a. True b. False Indicate whether the statement is true or false