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A device used in radiation therapy for cancer contains 6.20×10-1 g of cobalt 2760Co (59.9333819 u). The half-life of 2760Co is 2.42 yr. Determine the activity of the radioactive material.
A spherical concave lens has a focal length of 20cm, and an object is placed 15cm from the lens. estimate of the image distance and give image characteristics
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter, Find the power consumed by the air filter
What travel time is required for the landing
A helicopter is ascending vertically with a speed of 5.98. At a height of 149 above the Earth, a package is dropped from a window. How long till the package hits ground.
A charge of -2.87 ?C is fixed in place. From a horizontal distance of 0.0470 m, a particle of mass 7.43 x 10-3 kg and charge -9.14 ?C is fired with an initial speed of 60.0 m/s, How far does the particle travel before its speed is zero
A submarine is 304 m horizontally out from the shore and 126 m beneath the surface of the water. A laser beam is sent from the sub so that it strikes the surface of the water at a point 232 m from the shore. If beam just strikes the top of a building..
A bucket filled with water has a mass of 48.00 kg and is attached to a rope that is wound around a 0.08 m radius cylinder. What torque does the bucket produce around the center of the cylinder.
A flashlight bulb with a resistance of 40 ohm is powered with a 6 volt battery and produces 0.75W of power. what is the voltage across the battery terminals when the light bulb is on
A symmetric double convex lens with a focal length of 25.0cm is to be made from glass with an index of refraction of 1.53. What should be the radius of curvature for each surface
imagine someone drops an apple from a vertical distance.
The cube in fig 22.32 has sides of length L=10.0cm. The electric field is uniform, has magnitude E=4.00*10^3 N/C, find the total electric flux through all faces of the cube
A generator has a square coil consisting of 288 turns. The coil rotates at 117 rad/s in a 0.218-T magnetic field. What is the length of one side of the coil
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