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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 body of mass 200 g is acted upon by a force of 20 n. Find the acceleration of the body. If the body above is having a volume of 1000 cm3 estimate its density in kg/m2.
You calculated a value of 0.49 s ± 0.04 s for the time constant from your graph. If you used a 1M?, what is the equivalent capacitance of your circuit
a ball is thrown horizontally from a high cliff with a velocity of 5 ms. ignoring the slowing of the ball due to air
A spring with spring constant 250 N/m is compressed by 0.13 m and then used to propel a 0.035-kg ball directly upward. If needed, use g = 10 m/s2. what is the height of the ball at it's peak
A singly charged ion of 7Li (an isotope of lithium) has a mass of 1.16×10?26kg. What is the radius of the ion's path in the magnetic field
An ashtray slides across a table with a speed of 0.6 m/s and falls off the edge. If it takes 0.4 s to reach the floor, how far from the edge of the table does the ashtray land
A small crack occurs at the base of a 15.0 m high dam. Theeffective crack area through which water leaves is 1.30 x 10^-3m^2. Ignoring viscous losses, what is the speed of water flowing through the crack?
Calculate the efficiency of a fossil-fuel power plant that consumes 380 metric tons of coal each hour to produce useful work at the rate of 800 MW
A solid cylinder has an area of 10cm^2 and a height of 1.0m. The cylinder is composed of 2 different materials with mass densities of 2000 kg/m^3, what is the mass of the cylinder
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. What is the voltage between the plates
A 5kg steel ball is dropped onto a copper plate from a heightof 10m. If the ball leaves a dent 3.2mm deep, what is the average force exerted by the plate on the ball during impact
A vertical spring (spring constant = 119 N/m) is mounted on the floor. A 0.390 kg block is placed on top of the spring and pushed down to start it oscillating in simple harmonic motion. The block is not attached to spring.
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