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The smooth, concrete-lined, symmetrical channel shown in Video V10.7 and Fig. P10.88 carries water from the silt-laden Colorado River. If the velocity must be 4.0 ft/s to prevent the silt from settling out (and eventually clogging the channel), determine the minimum slope needed.
If a visible photon with wavelength 434 nm is emitted from an atom in a hydrogen gas lamp, what energy state was the atom in before the photon was emitted? That is, what was the number for that state?
A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of mass 20.0 kg and length L that is hinged to a pole (beam and pole are perpendicular). A cable at an angle of 30.0 degrees with the beam helps to support the light. Find..
0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?
We are not normally aware of the gravitational or electric force between two ordinary objects. What is the reason in each case? Give an example where we are aware of each one and why.
A guitar player tunes the fundamental frequency of a guitar string to 300 Hz. (a) What will be the fundamentalfrequency if she then increases the tension in the string by 20%?
A 60 kg woman in an elevator is accelerating upward at 1.2 m/s^2. what is the normal force pushing upward on her feet
A 1 cm long section of the Achilles tendon stretches to 1.005 cm, What is the strain in this segment of tendon
A box of books is initially at rest a distance D = 0.515 m from the end of a wooden board. Find the speed of the box as it reaches the end of the board
Mercury is about 13.6 times the density of the human body. Assume that a person (Weight = 150lb {one could only wish}) were totally immersed in the mercury; what would be the buoyant force experienced by that person?
An uncharged nonconductive hollow sphere of radius16.0cm surrounds a17.0µC charge located at the origin of a cartesian coordinate system. A drill with a radius of 1.00 mm is aligned along thezaxis, and a hole is drilled in the sphere. Calculate th..
Care for the coffee as though it were pure water and neglect energy exchanges with environment.
A beam of light in air strikes a slab of glass (n= 1.50) and is partially reflected and partially refracted. Find the angle of incidence
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