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A gold nucleus has a radius of 7.3 x10^-15 m and a charge of +79e. Through what voltage must an alpha-particle, with its charge of +2e, be accelerated so that it has just enough energy to reach a distance of 2.4×10-14 m from the surface of a gold nucleus? (Assume the gold nucleus remains stationary and can be treated as a point charge.)
q1. a roller coaster 305 kg moves from a 5.00 m above the ground to b 23.0 m above the ground two non conservative
A concave mirror is of hemisphjerical shape with radius 40cm. A thin layer of unknown transparent liquid is poured into mirror. The mirror liquid forms a real image and another real image is formed by the mirror alone.
Now the gymnast (not holding any additional mass) walks directly above right support. What is the force the left support exerts on beam.
An engine flywheel initially rotates counterclockwise at 5.39 rotations per second. Then, during 21.3 seconds, its rotation rate changes to 2.11 rotations per second clockwise. Find the flywheel\'s average angular acceleration (including its sign) in..
A 300 kg piano slides 4.50 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
A parallel-plate capacitor with plate separation d = 1.6mm is made up of two plates of area S=3.6 cm2. The charges on the facing plate surfaces have the same magnitude Q but opposite signs.
The external magnetic field in a loop decreases from 0.1 Tesla to zero in 2 seconds. The loop of wire has ten turns, a radius of 10 cm, with its axis 45 degrees relative to the magnetic field. How large is the induced voltage in the loop?
a sloenoid 3.0 cm long consists of 8013 loops of wire if the magnetic field inside the solenoid is 3.0 T, what is the magnitude of the current that flows through it
A mechanic pushes a 2.20 x10^3 kg car from rest to a speed of v, doing 5400 J of work in the process. During this time, the car moves 28.0 m. Neglecting friction between car and road, find each of the following.
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. find the size of the image of the tree on your retina
A proton moves through a magnetic field at 31.1% of the speed of light. compute magnitude of the magnetic force acting on the proton
A person ofmass 75 kg stands at the center of a rotating merry-go-roundplatform of radius 2.8 m and moment of inertia 1300 kgm2. Calculate the rotational kinetic energy of the system
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