An object of mass 1.5 kg rests on a shelf where it has a gravitational potential energy of 7 joules. an object of mass 4.5 kg is placed on the same shelf. what is the gravitational potential energy of this second object? a. 7 joules b. 10 joules c. 21 joules d. 31.5 joules
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Physics, 21.06.2019 16:30
Calculate the kinetic energy of earth due to its spinning about its axis. krot = j compare your answer with the kinetic energy of the orbital motion of earth's center of mass about the sun. assume earth to be a homogeneous sphere of mass 6.00 1024 kg and radius 6.40 106 m. the radius of earth's orbit is 1.50 1011 m.
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Physics, 22.06.2019 06:40
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=20.8â with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0â 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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Physics, 22.06.2019 12:10
Energy flows from the producer level to the level. is called
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Physics, 22.06.2019 15:00
What happens when a rubber rod is rubbed with a piece of fur?
Answers: 1
An object of mass 1.5 kg rests on a shelf where it has a gravitational potential energy of 7 joules....
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