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Question: What should be the index of refraction of a transparent sphere in order for paraxial rays from an infinitely distant object to be brought to a focus at the vertex of the surface opposite the point of incidence?
A motorist suddenly notices a stalled car and slams on the brakes, negatively accelerating at 6.4 . Unfortunately this isn't enough, and a collision ensues. From the damage sustained, police estimate that the car was going 18 at the time of the co..
Suppose that the speed of light in a vacuum were one million times smaller than its actual value: c = 3.00 x 102 m/s. Determine how far you would have to compress the spring from its equilibrium length
A capacitor is connected across an ac source that has voltage amplitude 61.5 and frequency 80.0. What is the phase angle for the source voltage relative to the current
A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 370N. What is the final speed of the crate
In a calorimetry experiment an unknown amount of steam at 100 C is added to 1.5 kg of ice at 0C in a well insulated and sealed container. What is the mass of steam which was added to the ice
a rocket with inital mass 1000 kg adjusts its thrust byvarying the rate at which mass is ejected. the ejection speedrelative to the rocket is 30 km/s. find at what rateis mass being ejected at that instant
A uniform electric field exists between two conducting plates separated by 1.7mm . A dust grain with charge 65 nC between the plates feels a 26N electric force, Find the electric field
A low speed wind tunnel has an inlet cross sectional area of 2m2 and a test cross sectional area of 0.5m2. What is the inlet velocity
A pencil beam of 200-keV photons is normally incident on a 1.4-cm-thick sheet of aluminum pressed against a 2-mm- thick sheet of lead behind it. What fraction of the incident photons penetrate both sheets without interacting? What would be the differ..
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
A certain laboratory experiment requires an aluminum wire of length of 25.0 m and a resistance of 3.10 ohms at 20.0 degree Celsius
A stone is thrown out the window of high rise builind at an angle of 37.5° to the horizontal with an initisl speed of 22.0 m/d. from what height was the stone launched
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