Physics, 25.12.2019 20:31 zairaefh6496
Arocket is continuously firing its engines as t accelerates away from earth. for the first kilometer of its ascent, the mass of fuel ejected is small compared to the mass of the rocket. for this distance, which of the following indicates the changes, if any, in the kinetic energy of the rocket, the gravitational potential energy of the earth-rocket system, and the mechanicel energy of the earth-rocket system?
a. rocket kinetic energy-increasing system gravitational potential energy-increasing system mechanical energy-constant
b. rocket kinetic energy-decreasing. system gravitational potential energy-increasing sysem mechanical energy-constant
c. rocket kinetic energy-increasing system gravitational potential energy-decreasing sysem mechanical energy-decreasing
d. rocket kineic energy-increasing system gravitational potential energy nreasing syste mechanical energy-increasing
Answers: 2
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Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?
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Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?
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The energy released by a nuclear fusion reaction is produced when
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The photo shows sugar dissolved into a solution with excess sugar at the bottom of the jar this type of solution is classified as a. unsaturated b. compound c. saturated d. plasma
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Arocket is continuously firing its engines as t accelerates away from earth. for the first kilometer...
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