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About the years 214-212 BC, the Greek philosopher and scientist Archimedes is said to have repelled a Roman attack with a "death-ray" concave mirror, using sunlight to set the approaching fleet on fire. Assume an early morning attack from the East, with the Sun directly behind the ships. If the approaching fleet is 500 meters away, what would need to be the radius of curvature of the mirror in order to achieve maximum effect?
An object is located a distance do = 5.8 cm in front of a concave mirror with a radius of curvature r = 22.2 cm. Write an expression for the image distance
The largest barometer ever built was an oil-filled barometer constructed in Leicester England in 1991. Determine the density of the oil used in the barometer
A step-down transformer is used for recharging the batteries of portable electronic devices. Find the power delivered to the DVD player
A transformer has an input coil with Nin = 400 turns and Nout = 1050 turns. If the voltage across the input coil has an amplitude of 2.1 V, what is the voltage across the output circuit?
the drawing shows three particles far away from any other objects and located on a straight line. the masses and the
q1. sound waves of frequency 502 hz enter a window 1.18 m wide. the window is in the exact center of one wall of a
You wish to reduce the intensity of a beam of 1-MeV gamma rays from 5.12 x 10^7 per second to 2 x 10^5 per second. What thickness of aluminum is required
Compute the centripetal acceleration of a point on Earth's equator given earth's 24 H rotation period. Compare your answer with g=9.80 m/s
A 10.7 µC particle with a mass of 2.95E-5 kilogram moves perpendicular to a 1.32 T magnetic field in a circular path of radius 27.8 meter. Compute how fast is the particle moving
The company adheres to a 60% dividend payout ratio and has a P/E ratio of 19. There are 21,000 shares of stock outstanding. Illustrate what is the amount of the annual net income for the firm?
A compound microscope has objective and eyepiece focal lengths of 6.5mm and 2.2cm , respectively. what is the magnification of the instrument
When the plutonium bomb was tested in New Mexico in 1945, approximately 1 gram of matter was converted into energy. Suppose another bomb is tested, and 9.8 grams of matter are converted into energy. How many joules of energy are released by the explo..
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