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A contact lens is made up of a material with index of refraction 1.6. One face has to be in contact with the eye, so it is concave and has a radius of curvature of 2.5 cm. What must the radius of curvature of the outer (convex) surface be in order for the lens to have a focal length of 50 cm?
a turbine that uses steam drives an electric generator. the inlet stream flows through a 10 cm diameter pipe to the
Green light at 532 nm lights a diffraction grating with 800 lines per cm. Diffraction pattern is on screen 7.5m away. Calculate distance between the diffraction peaks on the screen
Find the resonance frequency of the ear canal, Treat it as a half-open pipe of diameter 8 mm and length 26.7 mm
The acceleration due to gravity on the Moon is about one-sixth what it is on Earth. how many times higher will it go than it would on Earth
A monochromatic parallel beam of light of wavelength 633 nm is incident on totally reflecting plane mirror.angle of incidence is 60 degree. and number of photon striking per second is 1X10^19.calculate force exerted by light beam on mirror
A solenoid is made by wrapping a wire so that it makes a solenoid (coil) having 500 turns of diameter 8.00 cm and length 40.0 cm. Find the inductance of this solenoid
Two lightbulbs operate on the same potential difference. What is the ratio of the current in bulb A to the current in bulb B
You have a grindstone ( a disk) that is 80.0 kg, has a .349-m radius, and is turning at 104.0 rpm, Calculate the angular acceleration of the grindstone
A curve in a highway has radius of curvature 130 m and is banked at 3.5°. On a day when the road is icy, what is the safest speed to go around the curve
What is the stress and strain in a 2 meter high, .025 m diameter brick column that supports a mass of 100000 kg? What is the factor of safety in the brick column
A parallel-plate capacitor has plates separated by 0.72 mm. what is the potential difference between the plates
W hat is the velocity of the gasoline in the tube
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