Physics, 27.08.2019 16:20 natethawsm
Studies of the relationship of the sun to our galaxy— the milky way—have revealed that the sun is located near the outer edge of the galactic disc, about 30 000 ly (1 ly 5 9.46 3 1015 m) from the center. the sun has an orbital speed of approximately 250 km/s around the galactic center. (a) what is the period of the sun’s galactic motion? (b) what is the order of magnitude of the mass of the milky way galaxy? (c) suppose the galaxy is made mostly of stars of which the sun is typical. what is the order of magnitude of the number of stars in the milky way?
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True or false graphs must include scales that increase by the same amount
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Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.
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Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive
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Physics, 22.06.2019 16:00
Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.
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Studies of the relationship of the sun to our galaxy— the milky way—have revealed that the sun is lo...
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