COSMIC PERSPECTIVE
COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135729458
Author: Bennett
Publisher: PEARSON
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Chapter S3, Problem 55EAP

Long Trips at Constant Acceleration: Earth Time. Suppose you stay on Earth and watch a spaceship leave on a long trip at a constant acceleration of 1g.

  1. At an acceleration of 1g, approximately how long will it take before you see the spaceship traveling away from Earth at half the speed of light? Explain. (Use  g = 9.8  m/s 2 .)
  2. Describe how you will see its speed change as it continues to accelerate. Will it keep gaining speed at a rate of 9.8 m/s each second? Why or why not?
  3. Suppose the ship travels to a star that is 500 light-years away. From your perspective on Earth, approximately how long will this trip take? Explain.

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Four point charges of equal magnitude Q = 55 nC are placed on the corners of a rectangle of sides D1 = 27 cm and D2 = 11cm. The charges on the left side of the rectangle are positive while the charges on the right side of the rectangle are negative. Use a coordinate system where the positive y-direction is up and the positive x-direction is to the right. A. Which of the following represents a free-body diagram for the charge on the lower left hand corner of the rectangle? B. Calculate the horizontal component of the net force, in newtons, on the charge which lies at the lower left corner of the rectangle.Numeric   : A numeric value is expected and not an expression.Fx = __________________________________________NC. Calculate the vertical component of the net force, in newtons, on the charge which lies at the lower left corner of the rectangle.Numeric   : A numeric value is expected and not an expression.Fy = __________________________________________ND. Calculate the magnitude of the…
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COSMIC PERSPECTIVE

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