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The sun is 1.5 1011 m from the earth.
(a) Over what surface area is solar radiation spread at this distance?
(b) What is the total power radiated by the sun? (The sun delivers energy to the surface of the earth at a rate of approximately 1400 W/m2.)
(c) Treating the sun as a body of emissivity 1, estimate its temperature. The sun's radius is 6.96 108 m.
As morning sunlight falls on a tethered helium balloon, it expands from a volume of 1.05 ×103 m3 to 1.15 ×103 m3. how much does the helium's internal energy increase
The exhaust temperature of a Carnot heat engine is 250°C, What is the intake temperature if the efficiency of the engine is 27.0%
at a steady laminar flow through a tube of radius of 1cm the volume flow rate is 30 liters of water during 1 minute.
A +2.7 µC charge is 32 cm to the right of a -5.3 µC charge. At the midpoint between the two charges, determine the potential and the electric field
A 5.0 ? resistor is connected in series with another resistor and a 5.0 V battery. The current in the circuit is 0.70 A. Calculate the value of the unknown resistance
q1. for an ideal atwood machine has a massless pulley of radius 10 cm which moves without friction and has masses of 2
A 100-W lightbulb has a resistance of about 12 ? when cold (20 ?C) and 140? when on (hot). Estimate the temperature of the filament
A loudspeaker of mass 15.0 is suspended a distance of h = 2.30 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30. What is tension in each cable.
A lens placed at the origin with its axis pointing all along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object. What is an image distance.
The athlete shown in the figure rotates a 1.00 kg discus along a circular path of radius 1.07 m. find the magnitude of the maximum radial acceleration of the discus
Calculate the irradiance on earth due to radiation from the sun
In a 45° - 90° - 45° prism with a ray of light entering and exiting on the long side of the prism after undergoing two total internal reflections. Determine the minimum index of refraction of the prism in order for this to occur
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