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A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 29.5° and the angle of refraction is 18.0°, find the critical angle for the liquid when surrounded by air.
A rotating cylinder about 16 {rm km} long and 6.8 km in diameter is designed to be used as a space colony. With what angular speed should it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth.
A box of textbooks of mass 24.7 kg rests on a loading ramp that makes angle a with the horizontal. The coefficient of kinetic friction is .25 and the coefficient of static friction is .37. Find out the minimum angle at which the box starts to sl..
What is the maximum sideways angle. What is the train's acceleration after its wheel begins to stick.
In a dentist's office, an X-ray of a tooth is taken using X-rays that have a frequency of 8.07 multiply.gif 1018 Hz
The magnitude of the electrostatic force between two identical ions that are separated by a distance of 0.90 nmis 4.103×10-8 N, How many electrons are missing from (or have been added to) each ion
Two students are on a balcony a distance h above the street. One student throws a ball vertically downward at a speed vi; at the same time, the other student throws a ball vertically upward at the same speed. Answer the following symbolically in t..
A clean and dry core sample weighing 425 g was 100% saturated with a 1.07 specific gravity brine, Calculate the porosity of the rock sample
An Australian emu is running due east in a straight line at a speed of 17.6 m/s and slows down to a speed of 15.7 m/s in 7.7 s. Assuming that the acceleration remains the same, what is the bird's velocity after an additional 2.0 s has elapsed?
Two manufactures of fiber optic material are in competition. ZipCo offers a fiber with a loss coefficient of 2.9E-3/m, Which company has the best offer
An old hunting weapon was a rock on the end of a string. The hunter would swing the rock in horzontal circles and then throw it. If the rock had a mass of 2 kg and the 2 m long string breaks when the tension is 60N.
What is the beat frequency in Hz. A force of magnitude P pushes the block forward and downward as shown in the figure below. suppose the force is applied at an angle of 24.0° below the horizontal.
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. how many billions of lbs of CO2 are emitted every year
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