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A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. We receive a radio pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. Suppose a pulsar has a period of rotation of T = 0.0520 s that is increasing at the rate of 7.60 x 10-8 s/y. (a) What is the pulsar's angular acceleration ? (b) If is constant, how many years from now will the pulsar stop rotating? (c) Suppose the pulsar originated in a supernova explosion seen 865 years ago. Assuming constant , find the initial T.
A 4.47 m long pole stands vertically in a lake having a depth of 2.22 m. while the sun is 62.6 degrees above the horizon, find the length of the pole's shadow on the bottom of the lake.
two flexible wires (massless) suspend a 10 cm-long conductor in the magnetic field with b = 4.2T. what is the current to let the wire just have zero tension
At 3.831 kHz the reactance in a circuit of a 3 mF capacitor and an inductor are equal in magnitude. What is the value of the inductor
A satellite is in elliptical orbit with a period of 8.82 x 104 s about a planet of mass 6.80 x 1024 kg. The pericenter distance is 15900000 m. What is its angular speed at apocenter
An automobile batery has 12 V and an internal resistance of .05 ohms. The starter draws 40 amps of current when starting the car. The resistance of the starter is
Find the magnetic field generated 5.0 cm above a single 2.5 cm long segment of copper wire carrying a current of 3.0 A. how much stronger is the actual field from the whole wire at this point
question1a diver springs upward from a board that is 2.85 meters above the water. at an instant she contacts the water
A riffle with a mass of 3.00kg fires a bullet with a mass of 3.50 x 10 ^ -3 kg at a speed of 330 m/s. What is the recoil speed of the riffle
which type of galaxy mostly consists of a collection of older red stars that are located in the center with blue and
A football resting on the ground is kicked at an angle of 35.0° towards the uprights with an initial speed of 20.0 m/s
Bicyclists in the Tour de France do enormous amounts of work during a race. How much work does he do during a 177-km race in which his average speed is 12.7 m/s
A doubly charged helium atom, whose mass is 6.6*10^-27 kg, is accelerated by a voltage of 3000 V. What will be its radius of curvature in a uniform 0.300 T field
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