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Agriculture and forestry for food and fuels, space heating of large and small buildings, water heating, and heating for drying and many other processes are current and potential applications of solar energy.
q1. if a power source provides 54 watts of power to operate a machine that draws 4.5 amps of current when in use what
A copper (Young's modulus 1.1 x 1011 N/m2) cylinder and a brass (Young's modulus 9.0 x 1010 N/m2) cylinder are stacked end to end, Find the amount by which the length of the stack decreases
Under favourable circumstances the human eye can detect 1.0e-18 J of electromagnetic energy. How many 600-nm photons does this represent.
Two sources emit waves that are in phase with each other. What is the largest wavelength that will give constructive interference at an observation point 161 m from one source
A circular coil enclosing an area of 180 cm2 is made of 210 turns of copper wire. The wire making up the coil has resistance of 9.0 ?, what is the average current in the coil during that time
A flashlight on the bottom of a 4-m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 1.70-m from the point directly above the flashlight. What angle (in air) does the emerging ray make with wat..
In a mass spectrometer the charged particles have to reach a common specific speed. To do so, they are accelerated with an electric field, determine the direction of the magnetic force
A lens in Lick Observatory's 36-inch refracting telescope has a thickness of 1.96 inches at its center and an index of refraction n=1.52. What is the light speed in the lens
A telescope can be used as a camera if the film is placed at the image position of the objective lens, what is the angular separation of the two stars
Light of 550nm is incident on two slits. A maximum is seen at an angle of 4.10 degrees and a minimum at 4.78 degrees. What is the distance between the slits
Tetchnetium is a radioactive isotope that emits a gamma ray with a half life of 6 hours. what fraction of the original dose remains in the body 24 hours after preparation
A ship is floating on a lake. Its hold is the interior space beneath its deck; the hold is empty and is open to the atmosphere. What volume of water per second leaks into the ship
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