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The Sun revolves around the center of the Milky Way Galaxy at a distance of about 30,000 light-years from the center (1ly = 9.5*10^15m). If it takes about 200milion years to make one revolution, estimate the mass of our Galaxy. Assume that the mass distibutino of our Galaxy is concentrated mostly in a central uniform sphere. If all the stars had about the mass of our Sun (2 * 10^30 kg), how many stars would there be in our Galaxy?
What is the upward force that Olivia applies to the handles in order to hold the wheelbarrow in that position.
The resultant displacement has a magnitude of 6.6m directed at the angle of 137 degrees from the positive x axis.
Four point charges, each with Q = 8.8 µC, are arranged at the corners of a square of edge length 1.4 m. What is the electric potential at the center of the square
The front 1.20 m of a 1600 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.
In response to a stimulus, membrane can become permeable to Na ions. As Na ions rush into the cell, the interior of the cell reaches an electric potential of about 40 rm mV.
How long did it take for officer to catch up to the car.
What is the electric potential energy of the electron as it is at midpoint and at 14cm from 5 charge.
250 kg ball is dropped to the floor from a height of 1.0 m and upon rebounding, reaches a height of .60 m. What is the impulse delivered to the ball by the floor?
W hat is crates acceleration
A student throws a water balloon vertically down from the top of a building. The balloon leaves the thrower's hand with the speed of 16 m/s. How fast is it traveling after 2.6 seconds.
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
A man drops a baseball off of the top of the Empire State Building. If an action force is the pull of the Earth on the ball, then what is the reaction force.
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