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The electron and proton in a hydrogen atom are separated by a distance of approximately 5.3x10^(-11) m. Discover the magnitudes of the electric force and the gravitational force among the two particles.
An amateur astronomer decides to build a telescope from a discarded pair of eyeglasses. One of the lenses has a refractive power of 11 diopters, How far apart should the lenses be separated
A carbon sample of the same size taken from a fresh piece of bone emits 16 beta emissions a minute. How long ago did the saber-tooth tiger live?
Light of wavelength 500 nm is incident normally on a diffraction grating. What is the number of rulings per centimeter for the grating
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 89.6 and diameter 3.00 from a storage room to a machinist. Calculate the weight of the rod
A horizontal aluminum rod 4cm in diameter projects 5.2 cm froma wall. A 1700kg object is suspended from the end of the rod. Find the vertical deflection on the end of the rod
Blocks A and B are connected across a frictionless pulley by a cord of negligible weight. If block B lies on a horizontal, frictionless surface and block A hangs vertically, what can be said about the acceelration of block B?
q1. a rifle with the barrel length of 62cm fires a 12g bullet with a horizontal speed of 380ms. the bullet strikes a
A soccer ball is lofted toward the goal from a distance of 9.00 m. It has an initial velocity of 12.7 m/s and is kicked at an angle of 72.0 degrees above the horizontal. (a) When the ball crosses the goal line, how high will it be a..
Monochromatic light at 441 nm is normally incident on an opaque film having a single slit of width 0.02 mm. What is the highest order diffraction minimum produced
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of -7.50 µC. Find the magnitude and direction of the electric field at O, the center of the semicircle. EO = N/C.
A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.4 m/s2. If the tension in the cord is 86 N, what is the lamp's mass
A 33.8-kg child runs with a speed of 2.80 m/s tangential to the rim of a stationary merry-go-round. Calculate both the initial and the final kinetic energy of the system
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