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A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 42.0° and the angle of refraction is 23.5°, find the critical angle for the liquid when surrounded by air.
°
At Zion National Park a loud shout produces the echo 3.40 s later from a colourful sandstone cliff. How far away is the cliff.
What is the frequency of the string.
Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W, How far will the bird fly before feeding again
A point charge q1=5microC and is fixed in place. From a horizontal distance of 6cm a small sphere of mass 0.004 kg and charge q2=2microC is fired towards the fixed charge at 40 m/s. What is the acceleration of the sphere when it is traveling 25 m/..
A heat pump has a coefficient of performance of 3.85 and operates with a power consumption of 6.88 x 103 W. How much energy does it deliver into a home during 2 h of continuous operation
While visiting the Albert Michelson exhibit at Clark University, you notice that a chandelier swings back, Calculate the frequency of oscillation (in Hertz) of the chandelier
At what energy does an electron become "relativistic"? Consider electrons with kinetic energies of 50 eV, 50 keV, and 50 MeV. When is it important to use the relativistic formulas
Suppose a muon produced as a result of cosmic ray colliding with a nucleus in the upper atmosphere has a velocity v = 0.9500c. What distance is this in the muon's frame
The circular top of a can of soda has a radius of 0.029m. The pull-tab has an area of 4.13 10-4m2. The absolute pressure of the carbon dioxide in the can is 1.4 x10^5Pa. Find out the force that this gas generates.
a Hollow sphere of mass M=1000kg and radius R=25cm is rolling down of an incline plans making an angle with horizontal. calculate the angular acceleration of hollow sphere
Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 23.0m/s as it leaves the hose nozzle. Find the angle of elevation of the hose
Two metal rods, silver and copper, are attached to a steam chamber with a temp 100 C, at one end and an ice bath ( 0 C ) at the other end. How much heat flows through the two rods in 60s
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