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A photon of wavelength 0.55000 nm strikes a free electron that is initially at rest. The photon is scattered straight backward. What is the speed v of the recoil electron after the collision?
The lenses used in a compound microscope have powers of + 90D and + 60D . If a total magnification of -250x is desired, what should be the distance between the two lenses
A physics book slides off a horizontal table top with a speed of 1.00m/s. It strikes the floor after a time of 0.390ss, Find the height of the table top above the floor
q1. a guitar string is 75 cm long and has a mass of 3.8 g. from the bridge to the support post l is 60 cm and the
Determine the flux of particles escaping from the exobase of Earth's atmosphere using a number density at the exobase of 10^5 particles/cm^3 and a temperature of 700K.
A proton accelerates from rest in a uniform electric field of 644 N/C. At some later time, its speed is 1.42 106 m/s. How long does it take the proton to reach this speed
A scuba diver and her gear displace a volume of 65.0 L and have a total mass of 64.0 kg. What is the buoyant force on the diver in sea water
How long does it take an automobile travelling 56.50 km/h to become even with a car that is travelling in another lane at 36.50 km/h if the cars' front bumpers are initially 148m apart.
A sphere of radius 10m and a mass of 5kg is rotated from restto achieve a rotational speed of 20 rad/sec in 10 secs? What is the angular acceleration of this sphere
A pump is required to lift 800 kg of water (about 210 gallons)per minute from a well 14.0m deep and eject it with a speed of 18.0m/s. What must be the power output of the pump
find out the angular speed after the grindstone has made.
q1. a standardized biological microscope has an 8.0--focal-length objective. what focal-length eyepiece should be used
A ship's mast reaches to a height of 15 meters above the surface of a 10-meter-deep lake. When the sun is 30° above the horizon, how long will the shadow of the mast be on the bottom of the lake?
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