The distance from the Sun to the nearest star is about 4 x 1016 m. The Milky Way galaxy is roughly a disk of diameter ~1021 m and thickness ~1019. Find the order of magnitude of the number of stars in the Milky Way. Assume the distance between the Sun and our nearest neighbor is typical.
Answer to relevant QuestionsThe position of a pine wood derby car was observed at various times; the results are summarized in the following table. Find the average velocity of the car for (a) The first second, (b) The last 3 s, and (c) The entire ...The position of a particle moving along the x axis varies in time according to the expression x = 3t2, where x is in meters and t is in seconds. Evaluate its position (a) At t = 3.00 s and (b) At 3.00 s + ∆t (c) ...A particle starts from rest and accelerates as shown in Figure P2.12. Determine (a) The particle’s speed at t = 10.0 s and at t = 20.0 s, and (b) The distance traveled in the first 20.0 s.A truck covers 40.0 m in 8.50 s while smoothly slowing down to a final speed of 2.80 m/s. (a) Find its original speed. (b) Find its acceleration.Help! One of our equations is missing! We describe constant acceleration motion with the variables and parameters vxi, vxf, ax, t, and xf - xi. Of the equations in Table 2.2, the first does not involve xf - xi . The second ...
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