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In proton-beam therapy, a high-energy beam of protons is fired at a tumor. The protons come to rest in the tumor, depositing their kinetic energy and breaking apart the tumor's DNA, thus killing its cells. For one patient, it is desired that 0.10 J of proton energy be deposited in a tumor. To create the proton beam, the protons are accelerated from rest through a 21MV potential difference.
What is the total charge of the protons that must be fired at the tumor to deposit the required energy?
A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr) for every 7.70 1011 stable carbon atoms. Find the number of carbon atoms in the sample
An elevator is initially moving upward at a speed of 11.18 m/s. The elevator experiences the constant downward acceleration of magnitude 4.44 m/s2 for 2.87 s.
A particle having charge q = +2.30 µC and mass m = 0.0100 kg is connected to a string that is L = 1.80 m long, Determine the speed of the particle when the string is parallel to the electric field
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. How large is the force that the catapult must exert on the jet
Consider a regular hexagon of side length, L = 10cm. A charge, Q = 2µC, is located at each vertex, Find the electric field vector at the center
Steel train rails are laid in 12.2m -long segments placed end to end. The rails are laid on a winter day when their temperature is -2.00 oC. what is the stress in them on a summer day when their temperature is 33.0 oC
Air passes through a large-diameter glass tube, then through a small-diameter tube, and finally through a large-diameter tube again, Find the velocity of the air in the small-diameter tube
A family ice show is held in an enclosed arena. The skaters perform to music playing at a level of 71.5 dB. What total sound intensity engulfs you
A jet aircraft with a mass of 4,575 kg has an engine that exerts a force (thrust) equal to 59,700 N. What is the jet's acceleration
Starting with the three particle system, find the change in electric potential energy if the alpha particle is allowed to escape to infinity while the two protons remain fixed in place. (Throughout, neglect any radiation effects.)
Rubber stopper attached to one end of the string and 100 g mass attached to the other end. A student gets the rubber stopper going in a horizontal circle above her head.
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 5.90 m/s2, What angle does the ramp make with respect to the horizontal
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