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Some sunglasses have half-silvered mirrors on them (on the front). Why can the wearer see through them, but no one else can see her yes behind the glasses?
At a market a bunch of bananas are set on a spring scale tomeasure their weight. What is the massof the bananas
The loaded cab of an elevator has a mass of 2.8 x 10^3 kg and moves 214 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab.
What is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order spectrum for visible light
A 11.2 kg object oscillates at the end of a vertical spring that has a spring constant of 1.90 104 N/m. Calculate the frequency of the dampened oscillation
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
A block is projected up a frictionless inclined plane with initial speed v0 = 8.50 m/s. The angle of incline is ? = 27.7°. How far up the plane does it go
Initially at rest, a small copper sphere with a mass of 4. 10-6 kg and a charge of 9. 10-4 C is accelerated through a 6500-V potential difference before entering a magnetic field of magnitude 4 T, directed perpendicular to its velocity. What is the r..
A beam of light is emitted in a pool of water from a depth of 64.0 cm. How far away, relative to the spot directly above it, must it strike the air-water interface in order that the light does not exit the water?
a thin lens of focal length 30.0 cm and is used to form an image that is twice the size of the object. Find the object position
A baseball is bunted down the third-base line leaving the bat from a height of 0.800m with an initial velocity of 8.00m/s at an angle 30 degrees above the horizontal. What is the speed of the ball just before it hits the ground
A 40.0 kg ballet dancer stands on her toes during aperformance with four square inches (26.0 cm^2) in contact with thefloor. What is the pressure exerted bt the floor over the area ofcontact in the following cases?
A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. What is the flux that passes through the circular loop
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