College Physics: A Strategic Approach, Books a la Carte Edition (4th Edition)
4th Edition
ISBN: 9780134700502
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Chapter 18, Problem 17CQ
A lens can be used to start a fire by focusing an image of the sun onto a piece of flammable material. All other things being equal, would a lens with a short focal length or a long focal length be better as a fire starter? Explain.
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Chapter 18 Solutions
College Physics: A Strategic Approach, Books a la Carte Edition (4th Edition)
Ch. 18 - Prob. 1CQCh. 18 - Can you see the rays from the sun on a clear day?...Ch. 18 - Prob. 3CQCh. 18 - Prob. 4CQCh. 18 - If you take a walk on a summer night along a dark,...Ch. 18 - You are looking at the image of a pencil in a...Ch. 18 - Prob. 7CQCh. 18 - In Manets A Bar at the Folies-Bergere (see Figure...Ch. 18 - Prob. 10CQCh. 18 - You are looking straight into the front of an...
Ch. 18 - Prob. 12CQCh. 18 - Prob. 13CQCh. 18 - Prob. 14CQCh. 18 - Prob. 15CQCh. 18 - A lens can be used to start a fire by focusing an...Ch. 18 - A piece of transparent plastic is molded into the...Ch. 18 - From where you stand one night, you see the moon...Ch. 18 - Prob. 20MCQCh. 18 - Prob. 21MCQCh. 18 - Is there an angle of incidence between 0 and 90...Ch. 18 - A 2.0-m-tall man is 5.0 m from the converging lens...Ch. 18 - You are 2.4 m from a plane mirror, and you would...Ch. 18 - As shown in Figure Q18.22, an object is placed in...Ch. 18 - Prob. 26MCQCh. 18 - Prob. 27MCQCh. 18 - The lens in Figure Q18 .25 is used to produce a...Ch. 18 - You look at yourself in a convex mirror. Your...Ch. 18 - A 5.0-ft-tall girl stands on level ground. The sun...Ch. 18 - Prob. 2PCh. 18 - A point source of light illuminates an aperture...Ch. 18 - Prob. 4PCh. 18 - It is 165 cm from your eyes to your toes. Youre...Ch. 18 - Prob. 6PCh. 18 - Prob. 7PCh. 18 - Prob. 8PCh. 18 - Prob. 9PCh. 18 - Prob. 11PCh. 18 - An underwater diver sees the sun 50 above...Ch. 18 - A laser beam in air is incident on a liquid at an...Ch. 18 - Prob. 14PCh. 18 - A 1.0-cm-thick layer of water stands on a...Ch. 18 - Prob. 16PCh. 18 - A 4.0-m-wide swimming pool is filled to the top....Ch. 18 - Prob. 19PCh. 18 - Prob. 20PCh. 18 - A light ray travels inside a horizontal plate of...Ch. 18 - Prob. 22PCh. 18 - Prob. 23PCh. 18 - Prob. 24PCh. 18 - A biologist keeps a specimen of his favorite...Ch. 18 - Prob. 26PCh. 18 - A fish in a flat-sided aquarium sees a can of fish...Ch. 18 - Prob. 28PCh. 18 - A swim mask has a pocket of air between your eyes...Ch. 18 - An object is 30 cm in front of a converging lens...Ch. 18 - An object is 6.0 cm in front of a converging lens...Ch. 18 - Prob. 32PCh. 18 - Prob. 33PCh. 18 - Prob. 34PCh. 18 - Prob. 35PCh. 18 - Prob. 36PCh. 18 - Prob. 37PCh. 18 - A light bulb is 60 cm from a concave mirror with a...Ch. 18 - Prob. 40PCh. 18 - A dentist uses a curved mirror to view the back...Ch. 18 - Prob. 42PCh. 18 - An object is 12 cm in front of a convex mirror....Ch. 18 - A 2.0-cm-tall object is 40 cm in front of a...Ch. 18 - A 1.0-cm-tall object is 10 cm in front of a...Ch. 18 - A 2.0-cm-tall object is 15 cm in front of a...Ch. 18 - A 1.0-cm-tall object is 75 cm in front of a...Ch. 18 - A 2.0-cm-tall object is 15 cm in front of a...Ch. 18 - A 1.0-cm-tall object is 60 cm in front of a...Ch. 18 - A 3.0-cm-tall object is 15 cm in front of a convex...Ch. 18 - A 3.0-cm-tall object is 45 cm in front of a convex...Ch. 18 - A 3.0-cm-tall object is 15 cm in front of a...Ch. 18 - A 3.0-cm-tall object is 45 cm in front of a...Ch. 18 - Prob. 54PCh. 18 - Prob. 55PCh. 18 - Prob. 57PCh. 18 - Prob. 59PCh. 18 - Prob. 60PCh. 18 - Prob. 61GPCh. 18 - You slowly back away from a plane mirror at a...Ch. 18 - Prob. 63GPCh. 18 - The place you get your hair cut has two nearly...Ch. 18 - Prob. 65GPCh. 18 - Prob. 66GPCh. 18 - Its nighttime, and youve dropped your goggles into...Ch. 18 - Figure P18.54 shows a meter stick lying on the...Ch. 18 - Prob. 69GPCh. 18 - Prob. 70GPCh. 18 - A 1.0-cm-thick layer of water stands on a...Ch. 18 - The glass core of an optical fiber has index of...Ch. 18 - A 150-cm-tall diver is standing completely...Ch. 18 - To a fish, the 4 00-mm-thick aquarium walls appear...Ch. 18 - A microscope is focused on an amoeba. When a...Ch. 18 - You need to use a 24-cm-focal-length lens to...Ch. 18 - A near-sighted person might correct his vision by...Ch. 18 - A 1.5-cm-tall object is 90 cm in front of a...Ch. 18 - A 2.0-cm-tall candle flame is 2.0 m from a wall....Ch. 18 - A 2.0-cm-diameter spider is 2.0 m from a wall....Ch. 18 - Figure P18.75 shows a meter stick held lengthwise...Ch. 18 - A slide projector needs to create a 98-cm-high...Ch. 18 - The pocket of hot air appears to be a pool of...Ch. 18 - Which of these changes would allow you to get...Ch. 18 - If you could clearly see the image of an object...
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