Physics, 27.07.2019 02:20 kealinwiley
Aspherical nuclear reactor of mass 1030 kg in interstellar space is completely surrounded by a thin, nonrigid spherical shell of matter with a mass of 1026 kg (see the figure). the reactor loses 1010 kg/sec of its mass by the emission of electromagnetic radiation. (if this sounds like the description of a star, it's no accident! ) this radiation is completely absorbed by the surrounding shell of matter. what must be the radius of the spherical shell if the repulsion exerted on it reactor thin by the radiation is just great enough to balance the gravitational shell attraction exerted on it by the reactor? (consider the forces exerted on a small portion of the shell.)
Answers: 2
Physics, 22.06.2019 00:00
Name three different units of energy used to measure heat and describe what type of situations each is usually used.
Answers: 1
Physics, 22.06.2019 07:00
What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next
Answers: 1
Physics, 22.06.2019 11:30
(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?
Answers: 3
Aspherical nuclear reactor of mass 1030 kg in interstellar space is completely surrounded by a thin,...
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