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Calculate the magnitude of the force (in N) between a gold nucleus and an electron on an orbit with radius 5.72·10-12 m around the nucleus. The gold nucleus has a charge of +79e.
The frequncy doubled output of a laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532 nm in 3 minutes
The density of a 3.61 m long rod can be described by the linear density function lambda(x) = 103 g/m + 10.3x g/m^2. determine the center-of-mass coordinate
A 5 kg sphere with a radius of 10 cm is thrown along a level surface so that initially it slides with a linear speed of 2 m/s, however does not rotate. As it slides, it begins to spin, and eventually rolls without slipping. How long does it take (in ..
The first three harmonics in an organ pipe are 126 Hz, 378 Hz and 630 Hz. (a) Is the pipe open-open or open-closed? (b) Taking the speed of sound in air to be 340m/s, and the length of the pipe.
A spacecraft uses the sun's radiation for propulsion. The sun's radiation pressure is 1000 W/m2 and the exposedarea of the spacecraft is 500 m2. If the sunlightis completely absorbed, what is the force on the spacecraft?
if a test charge is positioned near a charged body does the charge itself exert a force directly acting on the test
A 23-g bullet traveling 225 m/s penetrates a 3.2-kg block of wood and emerges cleanly at 185 m/s If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
Water (which can be considered to be an ideal fluid for this question) flows at a rate of 25L/min through a pipe of diameter7.0cm at a pressure of 6.0Pa. At one point in the horizontal pipe, calcium deposits reduce the cross-sectional area to 30cm2. ..
when one mirror of a michelson interferometer is moved a distance of 0.5 mm 2000 fringes are observed find the
Three charges are situated at corners of a rectangle. How much energy would be expended in moving the 8µC charge to infinity.
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other?(Hint: Use charge conservation and solve for one of the initial charges. You will end up with a quadratic equation. The solutions giv..
if the barge can only be pushed 20-cm deeper into the water before water overflows to sink it, how various 400-kg horses can it carry.
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