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The star S0-2, of spectral class B1 V, orbits the central black hole at the Galactic center on an orbit with a semimajor axis a = 920 AU and eccentricity e = 0.867.
a) What is the star's distance from the black hole and pericenter?
b) How close does the star get to the Roche limit?
Suppose you see two main-sequence stars of the same spectral type. Star 1 is dimmer in apparent brightness than Star 2 by a factor of 100. What can you conclude? (Overlook any effects that might be caused by interstellar dust and gas.)
A square plate of copper with 47.0 cm sides has no net charge and is placed in a region of uniform electric field of 79.0 kN/C directed perpendicularly to the plate. (a) Find the charge density of each face of the plate. (b) Find the total charge ..
question about simple harmonic motion shm is wronga.the restoring force is linear the net force is toward the
Spark plugs should be tightened to a specified torque of 13.64Nm. You have a wrench that is 0.27 m long, What force must you exert on the wrench
vector a is directed along the positive y-axis and has magnitude 5.0 units. vector b is directed along the negative
A 3.50-µF capacitor is fully charged by being connected to a 12.0-V battery. The fully charged capacitor is then connected to a 0.330-H inductor. Calculate the maximum current in the inductor
One cubic meter (1.00 m3) of aluminum has a mass of 2.70 103 kg, and the same volume of iron has a mass of 7.86 103 kg. Find the radius of a solid aluminum sphere
A 100 g ball on a 60 cm long string is swung in a vertical circle whose center is 200 cm above the floor. The string suddenly breaks while it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor..
A caterpillar climbs up a one-meter wall. For every 3 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Compute the speed at which the caterpillar travels.
An automobile transmission has 175 hp of power entering from the engine, 167 hp leaving to the wheels, while losing 5000 Btu/hr to the surroundings as heat.
how much mass can the larger piston support.
A galvanometer with a coil resistance of 9.27Ω and a full-scale current of 0.175 mA is used with a shunt resistor to make an ammeter. The ammeter registers a maximum current of 5.98 mA. Find the equivalent resistance of the ammeter.
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