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Two electrons in an atom are separated by 1.3 × 10?10 m, the typical size of an atom. What is the force between them? The Coulomb constant is 9 × 109 N · m2/C2. Answer in units of N.
The left end of a long glass rod 8.00 cm in diameter and with an index of refraction of 1.60 is ground and polished to a convex hemispherical surface with a radius of 4.00 cm. Find the height of the image formed by paraxial rays incident on the con..
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, and the outside temperature is -18° C. What is the increase in the entropy of the universe that this heat loss produces?
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence. compute the index of refraction for violet light in plastic
A(n) 84 g arrow is fired from a bow whose string exerts an average force of 110N on the arrow over a distance of 80cm. What is the speed of the arrow as it leaves the bow.
a block mass 15.92kg supported by a vertical massless cable is initially at rest. The block is then pulled upward with a constant acceleration of 2.11m/s^2. What is the tension in the cable
Light of a wavelength 450 nm is incident on a sodium emitter in a photoelectric effect apparatus. Sodium is 2.3 eV, What is the stopping potential for the emitted electrons
Use the Hubble law, the apparent visual magnitude of +12.9 and the observed redshift z = 0.158 to estimate the absolute magnitude of the quasar 3C 273 (which is the brightest quasar known). Compare the luminosity of 3C 273 with that of the Androme..
Julie drives 100 mi to her Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 25mph and the other half at 80. On her return trip, she drives half time at 25mph and half the time at 80 mph.
a 150lb male athlete is running on a treadmill machine at a speed of 10mi/hr in a thermally insulated room. after one hour how much weight will the athlete lose
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 68.80 diopters, If the writing on the blackboard is 5.70 cm high, what is the size of the image on her retina
A raft has a surface area of 100m^2 and a height of 10.0cm. If it is constructed of yellow pine and floating in a lake, calculate how much of the raft will be above the waterline
Three resistors are connected in series across a battery, What is the greatest voltage that the battery can have without one of the resistors burning up
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