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In proton-beam therapy, a high-energy beam of protons is fired at a tumor. As the protons stop in the tumor, their kinetic energy breaks apart the tumor's DNA, thus killing the tumor cells. For one patient, it is desired to deposit 0.12J of proton energy in the tumor. To create the proton beam, protons are accelerated from rest through a 9000kV potential difference.
What is the total charge of the protons that must be fired at the tumor?
A cart loaded with bricks has a total mass of 21.2 kg and is pulled at constant speed by a rope. The rope is inclined at 27.2 ? above the horizontal and the cart moves 27.1 m on a horizontal floor. The coefficient of kinetic friction between groun..
Two traveling waves with the same amplitude A, frequency f, and wavelength, but out of phase with each other by one quarter of a wavelength, aWrite the equation of the resulting traveling wave
how far is this point horizontally from the end of the ramp. A skateboarder shoots off a ramp with a velocity of 6.2 m/s, directed at an angle of 61° above horizontal. The end of the ramp is 1.5 m above the ground.
A 0.250 kg block is placed on a vertical spring (k = 5.0 x 10^3 N/m) and pushed downward, compressing the spring 0.10 m. As the block is free, it leaves the spring and continues to travel upward. What height above the point of release would the bl..
Two resistors are connected in a series to a 15V battery. The voltage drop across the first resistor is 3.5V, What is the resistance of the two resitors
A proton and an electron are moving due east in a constant electric field that also points due east, Determine the magnitude of the acceleration of the proton and the electron
At t = 0 a grinding wheel has an angular velocity of 23.0 rad/s. It has a constant angular acceleration of 31.0 rad/s2 until a circuit breaker trips at t = 2.00 s. From then on, it turns by 432 rad as it coasts to a stop at constant angular accele..
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.78% upon becoming charged. Determine the effective spring con..
When in deep space, the block accelerates at 4.2 m/s^2 even as a 120 N force is applied to it. The coefficient of static friction for a particular plane and this block is 0.31. What angle can this plane make with horizontal before the object starts t..
A 4.0mW laser beam has its electric field vertical. what's the power of the transmitted beam
A circuit consists of two 150.?k? resistors in series with an ideal 12.0?V battery. Calculate the potential drop across one of the resistors
The current through a 1.5 H inductor changes from zero to 1mA in 5 us. How much is the absolute value of self-induced voltage
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