If the mass of a body were doubled, its gravity would become 4 times stronger
Indicate whether the statement is true or false
FALSE
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Due to our ozone layer, ultraviolet astronomy must be done from space
Indicate whether the statement is true or false
It was once thought that a "black hole" absorbed all the radiation falling upon it and radiated none
If this were true, what would one infer the temperature of a black hole to be? Actually Stephen Hawking discovered that black holes have a VERY small probability of radiating. Modifying your first answer, would you now infer a large or small temperature for a black hole.?
What is the total mass of the Earth's atmosphere? The radius of the Earth is 6.4 × 106 m, and 1 atm = 1.01 × 105 N/m2.
A. 5.3 × 1016 kg B. 1.1 × 1018 kg C. 5.3 × 1018 kg D. 1.1 × 1020 kg E. 5.3 × 109 kg
Which one of the following is the correct order of the electromagnetic spectrum from low to high frequencies?
A) radio waves, infrared, microwaves, UV, visible, X-rays, gamma rays B) radio waves, UV, X-rays, microwaves, infrared, visible, gamma rays C) radio waves, microwaves, infrared, visible, UV, X-rays, gamma rays D) radio waves, microwaves, visible, X-rays, infrared, UV, gamma rays E) radio waves, infrared, X-rays, microwaves, UV, visible, gamma rays