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A light ray is incident from air onto the surface of a very quiet lake. If the angle of incidence is 34° and the angle of refraction is 24°, what is the index of refraction of the water?
A photographic image of a building is 0.0920 m high. The image was made with a lens with a focal length of 55.0 mm. determine the height of the building.
Here's a basketball problem: A 80.0 kg basketball player is running in the positive direction at 7.0 m/s. what is the resulting velocity of the 80.0 kg player
A horizontal force of magnitude 46.1 N pushes a block of mass 3.64 kg across a floor where the coefficient of kinetic friction is 0.554. find the increase in the kinetic energy of the block
A platform moves up and down in SHM, with amplitude 0.050 m. Resting on top of the platform is a block of wood. What is the shortest period of motion for the platform so that the block will remain in constant contact with it?
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
a proton moves vertically upward perpendicular to a uniform magnetic field and deflects to the right as you watch it. What is the direction of the magnetic field
there are 4 charges located on the corners of a square of side d. q1(top left = +1q) q2(top right= -1q), compute the electric potential at the center of the square
A candle is on the axis of a 15-cm-focal-length concave mirror, 36 cm from the mirror. Is the image real or virtual
A swimmer dived off a cliff with a running horizontal leap. What must his minimum speed be just as he leaves the top of the cliff
compute the distance x the spring was compressed.
As a function of time t, force component Fx that acts on a 3.00 kg ice block that can move only along the x axis. At t=0, the block is moving in positive direction of the axis, with a speed of 3.0 m/s. what are its (a) speed and (b) direction of trav..
A proton and electron are far away from each other, how quick would the electron be going in the orbit if we assume centripetal motion?Therefore, what is the electrnss kinetic energy
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