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Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person eye can detect a single photon of light of wavelength 503 nanometers and having an energy of 3.84 × 1019 Joule. We shall suppose that this energy is absorbed by a single cell during one period of the wave. Cells of this kind are called rods and have a diameter of approximately 2.0 × 103 millimeter. Compute the intensity delivered to a rod?
(in W/m2)
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the mass of the star
Two identical conducting spheres each having a radius of 0.500 cm are connected by a light 1.60 m long conducting wire. estimate the tension in the wire.
6.63 mol of argon gas is admitted to an evacuated 158.85 cm3 container at 48.95oC. compute the final pressure
Assume the skin temperature of a naked person is 34° C when the person is standing inside a room whose temperature is18° C. The skin area of the individual is 1.4 m2. Assuming the emissivity is 0.80, find the net loss of radiant power from the body.
A rescue plane flies horizontally at a constant speed searching for a disabled boat, If it takes the sound 2.10 s to reach the plane, determine the speed of the plane and What is its altitude
a 32 cm diameter conducting sphere is charged to 300 v relative to v 0 at r infinity .a what is the surface charge
The drawing shows three identical rods (A, B, and C) moving in different planes. A constant magnetic field of magnitude 4.50 T is directed along the +y axis. The length of each rod is L = 1.3 m, and the speeds are the same, vA = vB = vC = 2.9 m/s. Fo..
Two capacitors C1 and C2 are connected in parallel to one another, Find the equivalent capacitance of the system if the C1, C2, C3 are respectively 4, 6, 3.6 uF respectively
Newton’s Third Law of Motion states that when one object exerts a force on a second object, the forces are __ Equal in magnitude and equal in direction. Equal in magnitude and opposite in direction
Squids and octopuses propel themselves by expelling water. They do this by taking the water into a cavity and then suddenly contracting the cavity, How much kinetic energy does the squid create for this escape maneuver
A string is fixed at both ends and is vibrating at 124 Hz, which is its third harmonic frequency. Determine the length of the string
a 4kg watermelon is balanced on bruces shaved. r. lee ermey who hates watermelons with every fiber of his being shoots
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