Physics, 19.03.2021 01:00 shjsmbee8177
Which statements describe the motion of a planet according to Kepler’s second law? Check all that apply.
The speed of a planet varies as it moves in its orbit.
The speed of a planet is constant as it moves in its orbit.
A planet travels the same distance along its orbit in equal units of time.
A planet sweeps out an equal area in equal units of time.
A planet’s orbit is a circle centered on the Sun.
A planet’s orbit is an ellipse with the Sun at one focus.
Answers: 3
Physics, 22.06.2019 11:50, azertyqwerty123
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
Physics, 22.06.2019 12:30, lanaasad7733
An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg. how much energy e must be supplied to the device? express your answer in joules.
Answers: 1
Physics, 22.06.2019 18:10, victoriakraus6599
A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.
Answers: 2
Which statements describe the motion of a planet according to Kepler’s second law? Check all that ap...
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