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In radiofrequency (RF) ablation, a small needle is inserted into a cancerous tumor. When radiofrequency oscillating currents are sent into the needle, ions in the neighboring tissue respond by vibrating rapidly, causing local heating to temperatures as high as 100 degrees celcius . This kills the cancerous cells and, because of the small size of the needle, relatively few of the surrounding healthy cells. A typical RF ablation treatment uses a frequency of 750kHz .What is the wavelength that such radio waves would have in a vacuum?
You want to use a lens with a focal length of 37.0cm to produce a real image of an object, with the image twice as long as the object itself. Where should the object be placed
a mass M is hanging from two strings. There is a tension of 34 N in the string on the left and a tension of 24 N in the string on the right. How heavy is the object
Two Automobiles traveling at right angles to each other collide and stick together. Car A has a mass of 1200 kg and had a speed of 25 m/s before the collision, What was the speed of car B before the collision
A laser beam of unknown wavelength passes through a diffraction grating having 5590lines/cm , At what angle will the next pair of bright spots occur
The electric motor of a model train accelerates the train from rest to 0.600 m/s in 17.0 ms. The total mass of the train is 585 g. Find the average power delivered to the train during its acceleration
question1a small metal sphere carrying a net charge of -3.00 is held in a stationary position by insulating supports.
Calculate the acceleration on the radio. The rms voltage across a 5.02 Ω resistor is 34.7 V. Find the maximum instantaneous current by the resistor.
The overall length of a piccolo is 32.0 cm. The resonating air column vibrates as in a pipe that is open at both ends. Find the frequency of the lowest note a piccolo can play
A billiard ball moving at 5.30 m/s strikes a stationary ball of the same mass. Find the velocity (magnitude and direction) of the second ball after collision
Two UFOs collide over Roswell, New Mexico. Before the collision, UFO A (mass 10,000.00kg) has a velocity of +100.00m/s, What is the linear momentum vector of UFO A before the collision
The amount of 14C in an old, isolated sample of vegetation is 0.666 that expected from a present day sample with an equivalent carbon content
Draw or describe the free body diagram for the vehicle, showing all forces. Calculate these forces and list them with magnitude and direction
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