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The star nearest the earth (the sun) radiates the most energy at a wavelength of 470 nm. What is the temperatures of the sun's outer layer, the photosphere?
An object is lifted vertically 2m and held there. If the object weighs 30N, how much work was done in lifting it. Describe it briefly.
The particle then begins to move. Find out the speed of the alpha particle after it has moved through a potential difference of −3.45×10−3 V.
The mass of a robot is 4340 kg. This robot weighs 3000 N more on planet A than it does on planet B. Both planets have the same radius of 2.37 × 107 m
A +44 nC charge is placed on the z- axis at (0,0,5 cm). A grounded conducting plane fills the x-y plane where z=0. A) Find the surface charge charge density on the conducting plane at the origin.
In a Young's double-slit experiment, two rays of monochromatic light emerge from the slits and meet at a point on a distant screen, What is the wavelength (in nm) of the monochromatic light
A model airplane with mass 0.740 kg is tethered to the ground by a wire so that it flies in a horizontal circle 30.2 m in radius. Find the magnitude of the angular acceleration of the airplane
A 120 V (rms) AC power supply that delivers 0.5 A (rms) current is connected to "side 1" of a transformer. what is the peak voltage drop across the first resistor
In an internal combustion engine, air at atmospheric pressure and a temperature of about 20 ?C is compressed in the cylinder by a piston to 18.0 of its original volume, Estimate the temperature of the compressed air
An engine is built to extract power from the temperature difference in the ocean. what is the maximum theoretical efficiency of such an engine
A 12cm tall robin sits in a tree 1.500 m above a shiny lawn sphere with a diameter of 48.00 cm. How tall does the image of the robin appear as he sees his reflection? Use a ray diagram and the equations to locate and completely describe the image.
A massive starship with rest mass of 8x10^11 kg has a relavistic momentum of magnitude 5x10^20 kg m/s
Saturated water vapor at 2800C is isothermally condensed to a saturated liquid in a piston-cylinder system. Calculate the heat transfer
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