Physics, 25.09.2019 07:30 emilysjuliet110
Ablack hole is an object so heavy that neither matter nor even light can escape the influence of its gravitational field. since no light can escape from it, it appears black. suppose a mass approximately the size of the earth's mass 6.42 × 1024 kg is packed into a small uniform sphere of radius r. use: the speed of light c = 2.99792 × 108 m/s. the universal gravitational constant g = 6.67259 × 10−11 n m2 /kg2 . hint: the escape speed must be the speed of light. based on newtonian mechanics, determine the limiting radius r0 when this mass (approximately the size of the earth's mass) becomes a black hole. answer in units of m
Answers: 1
Physics, 21.06.2019 23:30
Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?
Answers: 2
Physics, 22.06.2019 02:00
Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules
Answers: 2
Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
Answers: 3
Ablack hole is an object so heavy that neither matter nor even light can escape the influence of its...
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