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The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is a good approximation to assume e=1 for these surfaces.
a) Find the radius of the star (assumed to be spherical) Rigel, the bright blue star in the constellation Orion, that radiates energy at a rate of and has surface temperature 11000.
b) Find the radius of the star (assumed to be spherical) Procyon B (only visible using a telescope), that radiates energy at a rate of and has surface temperature 10000.
Light with a wavelength of 525 nm passes through a single slit that is 35 micro meters wide. On a screen that is 1.5 m away, how far is the second dark spot from the central bright spot
A 1200-kg station wagon is moving along a straight highway at 12.0 m/s. Another car, with mass 1800 kg, Find the total momentum of the system
a 1600 kg car is traveling with a speed of 10 m/s. the driver slams on breaks, which give a force of 800 N. How far does the car go before reaching a halt
A spherical silver ball of radius 1 foot is set on a concrete pedestal as a lawn ornament. How big is the reflection of the hummingbird
A 100 Ohm resistor dissipates heat to its surroundings, isothermally. The resistor maintains a constant temperature of 300 K. How much energy does the surroundings absorb
You go to a gym and lift a 245-kg mass 2.13 m over the ground? You hold it for 10 seconds. How much work you did during the holding period
A mercury barometer reads 735.0 mm on the roof of a building and 764.5 mm on the ground. determine the height of the building
An 82 kg man drops from rest on the diving board 3 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him.
If the density and atomic mass of copper are respectively 8.80 103 kg/m3 and 63.5 kg/kmol, Determine the drift speed of the electrons in a 10 gauge copper wire (2.588 mm in diameter) carrying a 19.5 A current
A block of mass 2.50 kg is pushed 2.40 m along a frictionless horizontal table by a constant 16.0 N force directed 25.0° below the horizontal. Determine the work done by the force of gravity
question1the period of a simple pendulum defined as time necessary for one complete oscillation is measured in time
A concave mirror produces an upright virtual image that is 3.00cm times taller than the object. The focal length is 15.0cm. Dtermine the distance to the image
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