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Gliese 581c is the first Earth-like extrasolar terrestrial planet discovered. Its parent star, Gliese 581, is a red dwarf that radiates electromagnetic waves with poser 5.00x10^24W, which is only 1.30% of the power of the Sun. Assume the emissivity of the planet is equal for infrared and for visible light and the planet has a uniform surface temperature. Identify (a) the projected area over which the planet absorbs light from Gliese 581 and (b)the radiating area of the planet. (c) If an average temperature of 287K is necessary for life to exist on Gliese 581c, what should the radius of the planet's orbit be?
A block with mass m = 19.0 kg slides down an inclined plane of slope angle 17.8 ° with a constant velocity. It is afterwards projected up the same plane with an initial speed 1.35 m/s. How far up the incline would the block move before coming to rest..
an 18 year old strucks a tennis ball that is departed from the racket horizontally with a speed of 28.0 ms. andy
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Two 2.2 kg masses are 1.4 m apart on a frictionless table. Each has +1.0 µC of charge. What is the magnitude of the electric force on one of the masses
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A gas cylinder of volume 26 liters contains an ideal gas at temperature 27 degrees C and pressure 1920 kPa. How many moles of gas leaked
An electric car accelerates for 8.0 s by drawing energy from its 305-V battery pack. Find the minimum horsepower rating of the car
in a double-slit interference experiment the wavelength is ? 652 nm the slit separation is d 0.150 mm and the screen
question how fast can you set the earth moving? in particular when you jump straight up as high as you can what is the
two 1.9kg masses are 1.5m apart center to center on a frictionless table. each has 9.3?c of charge.what is the
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