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A beam of particles is directed at a 0.017-kg tumor. There are 2.1x10^10 particles per second reaching the tumor, and the energy of each particle is 4.8MeV. The RBE for the radiation is 14. Find the biologically equivalent dose given to the tumor in 19s.
compute how much charge must be placed on the surface of a sphere of radius 0.31 m for the electric potential just above the surface to be 100 V. Assume that the charge is uniformly distributed.
A spring (75N/m ) has an equilibrium length of 1.00 m. The spring is compressed to a length of 0.50 m, If the mass is attached to the spring, how far up the slope from the compressed point will the mass move before coming to rest
Three identical point particles that have charge q are at the vertices of an equilateral triangle that is circumscribed by a circle of radius a that lies in the z = 0 plane, What is the electric potential at the origin
A flask is filled with 1.51 L (L = liter) of a liquid at 98.8 °C. When the liquid is cooled to 15.6 °C, What is the coefficient of volume expansion of the liquid
An object moves 2.90m in the + x- direction under the influence of a 148 N force directed 42 degrees above the x-axis. Find the work done on the object
Two people are pushing inward on a door from the outside. One person is pushing the door shut from the inside. how much force is the hinge exerting on the door
A constant 80-N force acts on a 5.0 kg box. The box initially is moving at 20 m/s in the direction of the force, Determine both the work done by this force
After a tornado, a 0.60g straw was found embedded 3cm into the trunk of a tree. If the average force exerted on the straw by the tree was 90N, what was the speed of the straw when it hit the tree.
A microwave oven operates at 2.4 GHz with an intensity inside the oven of 2650W/m2. What is the amplitude of the oscillating electric field
What is the flow speed of the medicine through the needle. What is the least force the nurse needs to apply to the syringe.
A solid sphere of mass 2.5 Kg and a radius .15m starts from rest at the top of the ramp inclined 15 degrees, and rolls to the bottom without slipping. What is the total kinetic energy of the sphere
An empty storage tank has a volume of 140 ft3. What is the buoyant force exerted on it by the air
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