Physics, 27.08.2019 16:20 andreimru123123
Lthough human beings have been able to fly hundreds of thousands of miles into outer space, getting inside the earth has proven much more difficult. the deepest mines ever drilled are only about 10 miles deep. to illustrate the difficulties associated with such drilling, consider the following: the density of steel is about 7900 kilograms per cubic meter, and its breaking stress, defined as the maximum stress the material can bear without deteriorating, is about 2.0×109 pascals. what is the maximum length of a steel cable that can be lowered into a mine? assume that the magnitude of the acceleration due to gravity remains constant at 9.8 meters per second per second.
Answers: 2
Physics, 22.06.2019 09:30
Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy
Answers: 1
Physics, 22.06.2019 11:50
Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?
Answers: 2
Lthough human beings have been able to fly hundreds of thousands of miles into outer space, getting...
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