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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 1.54 107 m/s is projected head-on toward a gold nucleus with a charge of +79e, how close will the helium atom come to the gold nucleus before it stops and turns around?
The Hall voltage across a conductor in a 55 magnetic field is 1.9 . When used with the same current in a different magnetic field, the voltage across the conductor is 3.
Water flows at 5.0;{rm L}/{rm s} through a horizontal pipe that narrows smoothly from 10 cm diameter to 5.0 cm diameter. A pressure gauge in the narrow section reads 50 kPa. What does the other pressure gauge read.
What happens in the table as to the potential energies
Heat is extracted from a certain quantity of steam at 100 degrees celsius. Thus the steam changes into ice at 0 degrees celsius. If this energy were used to accelerate the ice from rest, what would be the linear speed of the ice.
The disk would slide off the turntable if it is located at a radius larger than 16 cm from the axis of rotation. What is the coefficient of static friction.
A person of mass 89.70 kg escapes from the burning building by jumping from a window situated 27.50 m above a catching net.
What is an average velocity of the train throughout run
Calculate the speed of a proton after it accelerates from rest through a potential difference of 160.
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
Estimate the initial speed of that car assuming a level road.What would be the equilibrium temperature when a 252 block of copper at 275 is placed in a 136 aluminum calorimeter cup containing 807 of water at 14.90.
Provide your answer in m/s in scientific notation to three significant digits (i.e. 1.15*10^2)
How much work should Denise do to drag her basket of laundry of mass 6.0 kg a distance of 3.0 m along a floor, if the force she exerts is a constant 50.0 N at an angle of 70.0° with the horizontal.
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