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How practical is solar power for various devices? Assume that on asunny day, sunlight has an intensity of 1000 W/m2 at thesurface of Earth and that, when illuminated by that sunlight, asolar panel can convert 10% of the sunlight's energy into electricpower. For each device given below, calculate the area A of solarpanel needed to power it. (a) A calculator consumes 50 mW. Find A in cm2. Is A small enough so thatthe solar panel can be mounted directly on the calculator that itis powering? (b) A hair dryer consumes 1500 W. find A inm2. Assuming no other electronic devices are operatingwithin a house at the same time, is A small enough so thatthe hair dyer can be powered by a solar panel mounted on thehouse's roof? (c) a car requires 20 hp for highway driving atconstant velocity (this car would perform poorly in situationsrequiring acceleration). Find A in m2. IsA small enough so that this solar panel can be mounteddirectly on the car and power it in "real time"?
A man's leg can be thought of as a shaft of bone 1.2m long. If the strain is 1.3x 10^-4 when the leg supports his weight, by how much is his leg shortened
question1viscoelasticity a deformation of cross-linked polymeric microgel particle carbopol is described by the
A proton is released from rest in a uniform electric field of magnitude 409 N/C. Find the acceleration of the proton and direction
The size of an atom is approximately 10-8cm. to locate an electron within the atom, one should use electromagnetic radiation of wavelength not longer than, say, 10-9cm, what is the energy of a photon with such a wavelength
A ball is thrown vertically upward with a speed of 1.63m/s from a point 4.21m above the ground. What is the time at which it will reach the ground.
when 200nm light is incident on the cathode of a photoelectric tube the stopping potential is 4.2v.a find the velocity
suppose 5.00 g of hydrogen is separated into electrons and protons. suppose also the protons are placed at the earths
a 890kg electric car uses a 270v battery pack. as the car accelerates from rest 450c flows from the battery. whats the
From what height did the student fall? Suppose that the only force acting on him all through the impact is that because of the ground.
Both surfaces of a double convex lens have radii of 30.0 cm. what is the index of refraction of the lens material
Find tension in the back muscle and the compressional force
An undersea research chamber is spherical with an external diameter of 5.40 m. The mass of the chamber, when occupied, is 70400 kg. It is anchored to the sea bottom by a cable.
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