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Some telephoto cameras use a mirror rather than a lens. What radius of curvature mirror is needed to replace a 855 mm focal length telephoto lens?
Keep getting this one wrong. I have no idea why.
I have as an equation F = R/2 so I did 0.855 m x 2 = 17.1 m.
Suppose a neutrino is created and has an energy of 49.0 MeV. (a) Assuming the neutrino, like the photon, has no mass and travels at the speed of light, find the momentum of the neutrino. (b) Determine the de Broglie wavelength of the neutrino.
A thin, uniform, rectangular sign hangs vertically above the door of a shop. The sign is hinged to a stationary horizontal rod along its top edge. Find its angular speed immediately after the impact
An engine absorbs 1702 J from a hot reservoir and expels 1198 J to a cold reservoir in each cycle. What is the engine's efficiency? How much work is done in each cycle?
A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.8 m below A, another ball bearing is released from rest from a position 5.8 m below A. At what time after its release will the second ball bearing be overtaken by the..
A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. at what rate does the box accelerate down the slope
Determine the acceleration of the bullet while in the barrel? A bullet in a rifle barrel does not have constant acceleration, but constant acceleration is to be assumed for this problem.
an air column in a glass tube is open at one end and closed at the other by a movable piston. the air in the tube is
Energy [define work and energy; kinetic energy and gravitational potential energy (incl. trends); (total) energy; law of Conservation of Energy (LCE); dropping object as illustration of LCE (detail ); energy transformation
a string of length 1.2m vibrates in 7 loops at a frequency of 70hz. show worka. what is the wavelength?b. at what
How much work is done on an object that travels 3 meters under a constant force of 2 Newtons? What distance can an 11 kg object be moved by 150 Joules of work at a constant force of 10 Newtons
In a time of T seconds, a motorcycle can accelerate from rest to the speed v. Calculate the speed of the motorcycle (in terms of v) 7T after starting
What is the speed of light in a diamond that has an index of refraction of 2.4168? Calculate your answer to 3 significant figures
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