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In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. If a helium nucleus with a mass of 6.68 × 10-27 kg, a charge of +2e, and an initial velocity of 1.50 × 107 m/s is projected head-on toward a gold nucleus with a charge of +79e, how close will the helium nucleus come to the gold nucleus before it stops and turns around? (Assume the gold nucleus is held in place by other gold atoms and does not move. Also assume that the initial distance of the helium nucleus from the gold nucleus is very large
A ball is droprd from a height of 78.4 metres above the ground. find the final Velocity just before hitting the ground
An artillery shell of mass 10.00 kg, lying at rest on the ground, accidentally detonates, exploding into three pieces of shrapnel. What is the speed of the third piece of shrapnel
A typical red blood cell subtends an angle of only 1.8×10^-5 rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
A ray of red light in air (wavelength=650nm) is incident on a semicircular block of clear plastic (n=1.51 for this light), Th ray strikes the block at its center of curvature at an angle of incident of 27 degrees. Determine the wavelength of the l..
Assume the system rotates in the yz plane about the x axis with an angular speed of 2 rad/s. Find out the moment of inertia of the system about the x axis.
an astronaut weighs 150 lbs on the surface of the earth. what does she weigh if she is resting in the space shuttle
a 0.5kg block at rest on a table is attached to a horizontal spring with a spring constant k200 nm. the spring is
A particular string of length 3.2 m resonates in four loops at a frequency 360 Hz. What is the distance between two adjacent nodes? What is the frequency of the standing wave that will produce 5 loops?
A square panel with sides of length 8 inches is 1 inch thick and has a thermal conductivity of 0.53 W K?1 m?1. find the rate of heat transfer through the thickness of the panel
A monatomic ideal gas is heated while at a constant volume of 1x10^-3 m^3, using a 10 watt heater. How long was the heater on
a certain lcd projector contains a single thin lens. an object 23.5mm high is to be projected so that its image fills a
You measure an electric field of 1.37×106N/C at a distance of 0.159m from a point charge. What is the electric flux through the surface of a sphere
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