Physics, 25.10.2019 17:43 aletadaboss
The institute of space and astronautical science in japan proposes to place a radio telescope into an even higher orbit than the halca telescope. using this telescope in concert with a ground-based radio telescope, baselines as long as 25,000 km may be obtainable. astronomers want to use this combination to study radio emission at a frequency of 43 ghz from the molecule silicon monoxide, which is found in the interstellar clouds from which stars form. (1 ghz = 1 gigahertz = 109 hz.) (a) what is the wavelength of this emission? (b) taking the baseline to be the effective diameter of this radio-telescope array, what angular resolution can be achieved?
Answers: 3
Physics, 22.06.2019 22:20
One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.
Answers: 2
Physics, 23.06.2019 05:00
Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano.the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? positive force → balanced force → negative force negative force → balanced force → positive force positive force → unbalanced force → negative force negative force → unbalanced force → positive force
Answers: 1
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