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A radioactive source in the form of a metallic sphere of radius 10^-2 m emits beta particles at the rate of 10^10 particles per second. The source is electrically insulated. What is the time required for its potential to be raised by 4 V assuming 50% of the emitted beta particles escape the source?
It is desired to project an image of an object four times actual size with a lens of focal length 20 cm. What object distance should be used
A boat is traveling upstream in the positive direction of the x axis at 12 km/h with respect to the water of a river. Find the velocity of the boat with respect to the floor
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed.
A water tower supplies water through the plumbing in a house. A 2.54-cm-diameter faucet in the house can fill a cylindrical container with a diameter of 62 cm and a height of 36 cm in 12 s. How high above the faucet is the top of the water in the ..
If you were to design an electric heater using Nichrome wire as the heating element, determine what parameters of the wire could you vary to meet a particular power output such as 1000Watt
Why is it more difficult to walk on a sandy road than on a concrete road? Please give explanation.
a muon is created by a cosmic-ray interaction at an altitude of 60 km. imagine that after its creation the muon hurtles
A 203 rad dose of radiation is administered to a patient in an effort to combat a cancerous growth. Suppose that all of the energy deposited is absorbed by the growth.
On a frictionless horizontal air table, puck A (with mass 0.246 ) is moving toward puck B (with mass 0.370 ), which is initially at rest. What was the speed of puck A before the collision
A 6.0mH inductor is connected in parallel with a variable capacitor. What is the minimum oscillation frequency for this circuit
q1. a long hollow cylindrical conductor inner radius 2.0 mm outer radius 4.0 mm carries a current of 13 a distributed
oppositely charged parallel plates are separated by 5.36 mm. a potential difference of 600 v exists between the
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