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A beam of light is incident from air onto a flat piece ofpolystyrene at an angle of 52^{\circ} relative to a normal to the surface. What angle does the refracted ray make withthe plane of the surface?
It's nighttime, and you've dropped your goggles into a swimming pool that is 4.5m deep. How far are the goggles from the edge of the pool
An ice cube slides from rest without friction down a long inclined ramp that makes an angle of 20.0o with the horizontal. What is the speed of the cube
A fortune teller's "crystal ball" (actually just glass) is 13 cm in diameter. An image of the ring appears on the opposite side of the crystal ball. How far is the image from the center of the ball
A very short solenoid contains N = 20 circular loops of wire. what is the magnetic field in the center of the solenoid
a parallel-plate capacitor with area 0.900 m2 and plate separation of 1.00 mm is connected to a 15.00-v battery.a what
A certain type of molecule has an excited energy states, plus the minimum energy ground state. what is the energy of the ground state
A copper (Young's mudulus 1.1 x 10^11 N/m2) cylinder and a brass (Young's mudulus 9.0 x 10^10 N/m2) cylinder are stacked end to end, Find the amount by which the length of the stack decreases
When 22.9 J was added as heat to a particular ideal gas, the volume of the gas changed from 54.3 cm3 to 100 cm3 while the pressure remained at 1.00 atm. By how much did the internal energy of the gas increase
Suppose that while moving into an apartment you move a refrigerator into place by sliding it across the floor. What is the least force you could exert on the refrigerator to move it
A +2.7 µC charge is 32 cm to the right of a -5.3 µC charge. At the midpoint between the two charges, determine the potential and the electric field
How many photons are emitted during 7.0 s of operation of a red laser pointer? The device outputs 2.5 Watts at a 635 nm wavelength
a cube of edge length 2.1 cm is positioned as shown in the figure below. there is a uniform magnetic field throughout
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