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An electron and a proton are each accelerated through a potential difference of 21 million volts. Find the momentum (in MeV/c) and kinetic energy of each, and compare with the results when using the classical formulae.
Sketch a free-body diagram of the plank. How far can a painter of mass 70.0 kg walk on the overhanging part of the plank before it tips.
The radius of the circular orbit is 8.92 × 106 m. Examine the magnitude of the gravitational force exerted on the satellite by the planet.
Red light of wavelength 670.0 nm produces photoelectrons from a certain photoemissive material. What is the material's work function
a log is floating on swiftly moving water. a stone is dropped from rest from a 79.1-m-high bridge and lands on the log
The angular resolution of a radio telescope is to be 0.100 degrees when the incident wave has a wavelength of 3.00mm. What minimum diameter is required for the telescope's receiving dish
A helium weather balloon is used to lift a meteorological sensor package high up into the atmosphere. Calculate the number of moles of helium in the balloon
Jonathan is riding a bicycle and encounters a hill of height h. At the base of the hill, he is traveling at a speed vi. What is the change in potential energy stored in Jonathan's body
A 60-V generator supplies 4.5 kW of power. How much current does the generator produce
A garden hose has an internal diameter of 1.5 cm. It's connected to a sprinkler that consists merely of an enclosure with 14 holes, At what speed does it leave the sprinkler
When a person inhales, air moves down the bronchus (windpipe) at 17 cm/s. The average flow speed of the air doubles through a constriction in the bronchus. Assuming incompressible flow, determine the pressure drop in the constriction.
There is a second sphere identical to the first, except that its center is hollowed out so that it is empty from r = 0 to r = 10 cm. Find the electric field everywhere outside of this sphere
In refraction the angle of refraction depends on the wavelength, longer wavelengths bend less. How does the wavelength affect the angle of reflection
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