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A sample of tissue absorbs a 56-rad dose of α (alpha) particles (RBE = 14). How many rad of protons (RBE = 10) cause the same amount of damage to the tissue?
A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 430 N. Find the child's speed at the lowest point
A convex spherical mirror, whose focal length has a magnitude of 20.6 cm, is to form an image 13.0 cm behind the mirror. What is the magnification of the mirror
Some rearview mirrors produce images of vehicles behind you that are smaller than they would be if the mirror were flat. Compute what is the mirrors radius of curvature
Two horses pull horizontally on ropes attached to a tree stump. Each horse pulls with a force of magnitude F. If the resultant force (vector R) has the magnitude R = 1.58 F, what is the angle (in degrees) among the two ropes?
a swimmer capable of swimming at a speed of 1.59 ms in still water i.e. the swimmer can swim with a speed of 1.59 ms
A 1.81 kg block and a 3.62 kg block are initially at rest on a frictionless, horizontal surface, How much does the kinetic energy of the system increase
how much heat transfer is req to raise the temp of a 0.750 kg al pot containing 2.50 kg of water from 30C to the boiling point and then boil away 0.750kg of water
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. how fast is the student going at the bottom of the slide
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.05 and a wavelength of 442 is traveling in the direction through empty space. What is the amplitude of the associated electric field
A meter stick is rotated about the end labelled 0.00 cm, therefore that the other end of the stick moves during an arc length of 8.66cm. Through what arc length s does the 25.0-cm mark on the stick move?
A spacecraft approaching the earth launches an exploration vehicle. Find the speed of the exploration vehicle relative to the spaceship
An object with mass 2.7 kg is executing simple harmonic motion, attached to a spring with spring constant k=280N/m. Calculate the maximum speed attained by the object
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