Physics, 10.12.2019 21:31 jak000067oyyfia
An astronaut is standing on the surface of a planetary satellite that has a radius of 1.74 × 10^6 m and a mass of 7.35 × 10^22 kg. an experiment is planned where a projectile needs to be launched straight up from the surface.
what must be the minimum initial speed of the projectile so it will reach a height of 2.55 × 10^6 m above this satellite's surface? (g = 6.67 × 10^-11 n · m^2/kg^2)
Answers: 3
Physics, 22.06.2019 16:30
In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?
Answers: 3
Physics, 23.06.2019 07:00
I) a gas contained within a piston-cylinder assembly undergoes two processes, a and b, between the same end states, 1 and 2, where p1 = 10 bar, v1 = 0.1 m3 , u1 = 400 kj and p2 = 1 bar, v2 = 1.0 m3 , u2 = 200 kj: ' process a: process from 1 to 2 during which the pressure-volume relation is pv = constant. ' process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2. kinetic and potential energy effects can be ignored. for each of the processes a and b, a) sketch the process on a p-v diagram. b) evaluate the work, in kj. c) evaluate the heat transfer, in kj.(ans : qb,12 = -65.0 kj)
Answers: 3
Physics, 23.06.2019 08:30
Hi , i am new here can anyone me out with this question why is space black after having so many shining objects like sun , moon , stars
Answers: 3
Physics, 23.06.2019 09:30
One historical reason that people in the indian subcontinent have been reluctant to use livestock for food has been that a. their digestive systems are unable to handle meat and proteins b. they refused to eat meat in order to show resistance to british imperialism c. they are able to use cattle as a labor mainstay of their agriculture d. they can use the meat from cattle as fertilizer to make crops grow better
Answers: 1
An astronaut is standing on the surface of a planetary satellite that has a radius of 1.74 × 10^6 m...
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