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On December 27, 2004, astronomers observed the greatest flash of light ever recorded from outside the solar system. It came from the highly magnetic neutron star SGR 180-20(a magnetar). During 0.20 s, this star released as much energy as our sun does in 250000 years. If P is the average power output of our sun, what was the average power output (in terms of P) of this magnetar?
An 77 kg quarterback jumps straight up in the air right before throwing a 0.43 kg football horizontally at 15 m/s. Illustrate how fast will he be moving backward just after releasing the ball?
A 45 cm diameter circular loop of wire is in a 0.525 T magnetic field oriented perpendicular to the plane of the loop. what is the average induced emf
how to compute the fraction of silver in the crown.
A small, 300 cart is moving at 1.90 on an air track when it collides with a larger, 1.00 cart at rest. After the collision, the small cart recoils at 0.890. Evaluate the speed of the large cart after the collision?
A m = 3 kg steel ball strikes a wall with a speed of v = 10 m/s at an angle of ?i = 60? with the surface. Determine the impulse given to the ball
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum, is vibrating with an amplitude of 6.3X10^-7m, what is the maximum acceleration of the eardrum
Establish angles subtended by the moon and the sun
A uniform disk with mass 39.5kg and radius 0.250 m is pivoted at its center about a horizontal, frictionless axle that is stationary. What is the magnitude a of the resultant acceleration of a point on the rim of the disk
an insulated container is filled with a mix of 400 g of water at 20 C and 60 g of ice at 0 C. assuming negligible heat is exchanged with the container, what is the temperature of the mixture when it reaches thermal equilibrium.
A 310g bird flying along at 6.2m/s sees a 8.0g insect heading straight toward it with a speed of 31m/s, What is the bird's speed immediately after swallowing
A space traveler weighs 580 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
What is the tension in the vine if Jill, whose mass is 59kg , is moving at 2.5m/s when the vine is vertical
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