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What is the angle of incidence in air of a light ray whose angle of refraction in glass is half the angle of incidence? Assume the refractive index of glass is 1.50.
guess the force between a proton and an electron at the Bohr radius of 0.5Å (1 Å=10-10 m). The magnitude of the charge of an electron, as well as a proton, is 1.6·10-19 C.
Assume that the air temperature is 20C and that no wind is blowing. How much time would elapse if the wind were blowing toward the observer at 33.0Km/h from where the rail was struck?
A satellite moves in a circular orbit around Earth at a speed of 4439 m/s. Determine the period of the satellites orbit
Two children pull in opposite directions on a toy wagon of mass 9kg. One exerts a force of 18 N and the other exerts a force of 46 N
A 100 kg scaffold is 6 m long. It is hanging with two wires, one from each end. A 500 kg box sits 1.6 m from the left end. What is the tension in the left hand side wire
The figure shows the light intensity on a screen behind a double slit. The slit spacing is 0.20 mm, What is the distance from the slits to the screen
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 10 m/s after the collision. If they skid for 5.4 seconds before stopping, how far did they skid?
What is the ratio of the intensities of an earthquake P wave passing through the Earth and detected at two points 17km and 49km from the source, what is the ratio of the amplitudes
A 2.0 mm tall object is 20.0 cm to the left of a diverging lens that has a focal length of f= -30.0 cm. how tall is the image?
A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source, What is the potential difference across the source
An automobile tire has a volume of 1 .64 x 10-2 m3 and contains air at a gauge pressure of 165 kPa when the temperature is 0.000C. What is the gauge pressure of the air in the tires
The speed of an alpha particle is determined to be 1.55×106 m/s. what is the magnitude of that potential
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