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A boat with a speed of 10 m/s in still water, tries to cross a river with a current flow 2.0 m/s and is a 100 meeters wide. If the boat starts out aimed for side of the bank directly opposite its initial location, but never corrects its course, how far down river does it land?
A ball is thrown horizontally from the top of a tower 30m high and lands 15m from its base. What is the ball's initial speed
A 5.80uFparallel-plate air capacitor has a plate separation of 4.00mmand is charged to a potential difference of 400V. Calculate the energy density in the region between the plates
A force of 725 N accelerates a 325kg object, initially moving at 7.50 m/s, to a final velocity of 28.5 m/s in 16.5 seconds. What was the change in kinetic energy of the object
What was the absorbed dose in the carbon walls? The average mass stopping powers of graphite and CO2 for the photons are, respectively, 1.648 and 1.680 MeV cm^2/g.
Suppose that a disk rotates through five revolutions in 4 seconds. What is the angular rotational velocity
A 10 N force acts on 5 kg object for 2.0s. What is the impulse of the force on the object, What is the change in momentum of the object
A see-saw board is supported at its center by a fulcrum A 25 kg person sits 80 cm from center. How much force does the fulcrum exert on board
If the kinetic energy of an electron is 910 eV, calculate its De Broglie wavelength. For this non-relativistic electron you must firs, calculate its velocity from the general kinetic energy equation
An iron rod is heated by a welder's torch. Initially it glows a dull red, then a brighter orange, and finally very bright white. Discuss this sequence in terms of black-body radiation.
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
Six grams of helium (molecular mass = 4.0 u) expand isothermally at 320 K and does 9000 J of work. determine the ratio of the final volume of the gas to the initial volume
Under normal conditions, humans radiate electromagnetic waves with a wavelength of about 9.0 microns. What is the frequency of these waves
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