Physics, 06.08.2019 06:20 michellen2020
Zorch, an archenemy of superman, decides to slow earth’s rotation to once per 29.5 h by exerting a force parallel to the equator, opposing the rotation. he uses an old saturn v rocket, stolen from nasa, which was originally used to send astronauts to the moon. this rocket can exert a thrust of f = 3.8x10^7 n
a) if the original angular velocity of earth is w0 and zorch is trying to get the earth to an angular velocity of we, how much time will it take him? use m and r for the mass and radius of the earth. (b) how long, in seconds, will it take him to do this? (notice that this period gives superman time to devote to thwarting other villains.)
Answers: 3
Physics, 22.06.2019 09:00, SisterMina
The material that keeps its new shape after it is stretched is called?
Answers: 1
Physics, 22.06.2019 10:30, arigar
Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.
Answers: 3
Physics, 22.06.2019 11:00, velazquezemmy45
What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.
Answers: 1
Zorch, an archenemy of superman, decides to slow earth’s rotation to once per 29.5 h by exerting a f...
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