Physics, 17.02.2020 17:36 cassmoney94
You are an astronomer who wants to study a faint star in the process of being born, which gives off most of its faint radiation in the infra-red. Which of the following would NOT be a step you would want to take?
(A) heat your telescope, so its delicate optics are not cold
(B) try to have your telescope as high above the layers of water vapor in the Earth's atmosphere as possible
(C) shield your telescope from the radiation given off by your graduate students
(D) isolate your telescope in very cold surroundings
(E) make sure your telescope optics are kept as free of dust as possible
Answers: 2
Physics, 22.06.2019 09:50
If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?
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Physics, 22.06.2019 16:50
Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.
Answers: 1
Physics, 22.06.2019 17:00
How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters
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You are an astronomer who wants to study a faint star in the process of being born, which gives off...
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