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Chapter 1: Problem 115

How far (in feet) does light travel in one nanosecond?

Short Answer

Expert verified
Light travels approximately \(0.984\) feet in one nanosecond.

Step by step solution

01

Expression of Light Speed in Feet per Second

First, start with the speed of light in miles per second. There are \(5280\) feet in a mile, so multiply \(186282\) miles per second by \(5280\) to get the speed of light in feet per second, which should result in roughly \(9.84 \times 10^{8}\) feet per second.
02

Convert Seconds into Nanoseconds

There is a billion or \(10^9\) nanoseconds in 1 second. One must then divide the result from step 1 by \(10^9\) to find the distance light travels in a nanosecond. Which should result in approximately \(0.984\) feet per nanosecond.

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Most popular questions from this chapter

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A lead sphere of diameter \(48.6 \mathrm{~cm}\) has a mass of \(6.852 \times 10^{5} \mathrm{~g} .\) Calculate the density of lead.

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A student is given a crucible and asked to prove whether it is made of pure platinum. She first weighs the crucible in air and then weighs it suspended in water (density \(=0.9986 \mathrm{~g} / \mathrm{mL}\) ). The readings are \(860.2 \mathrm{~g}\) and \(820.2 \mathrm{~g},\) respectively. Based on these measurements and given that the density of platinum is \(21.45 \mathrm{~g} / \mathrm{cm}^{3},\) what should her conclusion be? (Hint: An object suspended in a fluid is buoyed up by the mass of the fluid displaced by the object. Neglect the buoyance of air.)
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