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A gamma-ray telescope intercepts a pulse of gamma radiation from a magnetar, a type of star with a spectacularly large magnetic field. The pulse lasts 0.21 second and delivers 7.0 × 10-6 Joule of energy perpendicularly to the 51 m2 surface area of the telescope's detector. The magnetar is thought to be 4.10 × 1020 meter (about 43000 light-years) from earth, and to have a radius of 8.1 × 103 meter. Obtain the magnitude of the rms magnetic field of the gamma-ray pulse at the surface of the magnetar, Assuming that the pulse radiates uniformly outward in all directions. (Assume a year is 365.25 days.)
Two parallel wires are 38 centimeter apart. Each wire is 1 centimeter long. Compute what is the force between the two wires
A nonconducting solid sphere of radius 10.1 cm has a uniform volume charge density. What is the sphere's volume charge density
q1. a dentists drill starts from rest. after 3.30 s of constant angular acceleration it turns at a rate of 2.6 104
Consider the motion of an apple and the Earth as the apple falls to the ground. If the apple begins at the top of a tree of height 11 m, Estimate the mass of an apple
Two capacitors give an equivalent capacitance of 9.00 pF when connected in parallel and an equivalent capacitance of 1.95 pF when connected in series. What is the capacitance of each capacitor?
A particle with a charge of -60.0 nC is placed at the center of anon conducting spherical shell of inner radius 20.0 cm and outer radius 27.0 cm. The spherical shell carries charge by a uniform density of -2.95 µC/m3. A proton moves in acicular orbit..
A 15 kilogram block rest on a level frictionless surface and it is attached by a light string to a 5.0 kilogram hanging mass, determine the tension on the connecting string
A space station has a diameter of 1000 ft (300 m) and to rotate at a rate sufficient to cause occupants in the outer rings to experience a centripetal force roughly equal to the gravitational force of the moon
At a reception, a 0.5 kg chunk of ice at -10 degres Celsius is placed in 3.0 kg of "iced" tea at 20 degrees Celsius. At what temperature and in what phase will the final mixture be
The tape is now wound back into the drum at angular rate. With what speed would the end of the tape move? (Note that our drawing specifies that a positive derivative of implies motion away from the drum. Be careful with your signs. The fact that the ..
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
One of James BOnd's adversaries is standing on a frozen lake; there is no friction between his feet and the ice. what is the magnitude of his horizontal recoil velocity
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