Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 30, Problem 39P
To determine
The maximum angle of deflection of pendulum.
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Sunlight above the Earth's atmosphere has an intensity of 1.35 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving the mirror twice the incident momentum.
(a) Calculate the force per square meter of mirror (in N/m2).
(b) Very low mass mirrors can be constructed in the near weightlessness of space, and attached to a spaceship to sail it. Once done, the average mass per square meter of the spaceship is 0.109 kg. Find the acceleration (in m/s2) of the spaceship if all other forces are balanced.
(c) How fast (in m/s) is it moving 24 hours later? (Assume the spaceship started from rest.)
Sunlight above the Earth’s atmosphere has an intensity of1.30 kW/m2 . If this is reflected straight back from a mirrorthat has only a small recoil, the light’s momentum is exactlyreversed, giving the mirror twice the incident momentum. (a)Calculate the force per square meter of mirror. (b) Very lowmass mirrors can be constructed in the near weightlessnessof space, and attached to a spaceship to sail it. Once done,the average mass per square meter of the spaceship is 0.100kg. Find the acceleration of the spaceship if all other forcesare balanced. (c) How fast is it moving 24 hours later?
(a) What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 90.0% absorbed, puts 500 J of energy into a circular spot 2.00 mm in diameter in 4.00 s?(b) Discuss how this intensity compares to the average intensity of sunlight (about 700 W/m2 ) and the implications that would have if the laser beam entered your eye. Note how your answer depends on the time duration ofthe exposure.
Chapter 30 Solutions
Physics for Scientists and Engineers
Ch. 30 - Prob. 1PCh. 30 - Prob. 2PCh. 30 - Prob. 3PCh. 30 - Prob. 4PCh. 30 - Prob. 5PCh. 30 - Prob. 6PCh. 30 - Prob. 7PCh. 30 - Prob. 8PCh. 30 - Prob. 9PCh. 30 - Prob. 10P
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