EBK PHYSICS
5th Edition
ISBN: 9780134051796
Author: Walker
Publisher: YUZU
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Chapter 2, Problem 13PCE
It was a dark and stormy night, when suddenly you saw a flash of lightning. Six and a half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt? (Ignore the travel time for the flash of light.)
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Picnickers see a lightning flash and hear the resulting thunder 5 seconds later. The storm is traveling at a rate of 21 km/hr.Use 344 m/s for the speed of sound.(a) Roughly how far away is the storm in miles?Don't use this number for parts (b) thru (e)(b) How far away is the storm (hint: use 344 m/s...)?(c) How fast is the storm in m/s?(d) How long do the picnickers have before the storm arrives (sec)?(e) How long do the picnickers have before the storm arrives (min)?
bat flying at 4.65 m/s is chasing an insect flying in the same direction. The bat emits a 39.8-kHz chirp and receives back an echo at 40.3 kHz. (Take the speed of sound in air to be v = 343 m/s.)
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If you observe a 6.0 second delay between a flash of lightning and its thunder, about how far away are you, in kilometers, if the speed of sound is 343 meters/second on that day?
Chapter 2 Solutions
EBK PHYSICS
Ch. 2.1 - For each of the following questions, give an...Ch. 2.2 - The position of an object as a function of time is...Ch. 2.3 - Figure 2-10 shows the position-versus-time graph...Ch. 2.4 - At a certain time, object 1 has an initial...Ch. 2.5 - The equation of motion for an object moving with...Ch. 2.6 - A submerged alligator swims directly toward two...Ch. 2.7 - On a distant, airless planet, an astronaut drops a...Ch. 2 - You take your dog on a walk to a nearby park. On...Ch. 2 - Does an odometer in a car measure distance or...Ch. 2 - An astronaut orbits Earth in the space shuttle. In...
Ch. 2 - After a tennis match the players dash to the net...Ch. 2 - Does a speedometer measure speed or velocity?...Ch. 2 - Is it possible for a car to circle a racetrack...Ch. 2 - For what kinds of motion are the instantaneous and...Ch. 2 - Assume that the brakes in your car create a...Ch. 2 - The velocity of an object is zero at a given...Ch. 2 - If the velocity of an object is nonzero, can its...Ch. 2 - Is it possible for an object to have zero average...Ch. 2 - A batter hits a pop fly straight up. (a) Is the...Ch. 2 - A person on a trampoline bounces straight upward...Ch. 2 - A volcano shoots a lava bomb straight upward. Does...Ch. 2 - Referring to Figure 2-27, you walk from your home...Ch. 2 - In Figure 2-27, you walk from the park to your...Ch. 2 - The two tennis players shown in Figure 2-28 walk...Ch. 2 - The golfer in Figure 2-29 sinks the ball in two...Ch. 2 - A jogger runs on the track shown in Figure 2-30....Ch. 2 - Predict/Calculate A child rides a pony on a...Ch. 2 - Predict/Explain You drive your car in a straight...Ch. 2 - Predict/Explain You drive your car in a straight...Ch. 2 - Usain Bolt of Jamaica set a world record in 2009...Ch. 2 - BIO Kangaroos have been clocked at speeds of 65...Ch. 2 - Rubber Ducks A severe storm on January 10, 1992,...Ch. 2 - Radio waves travel at the speed of light,...Ch. 2 - It was a dark and stormy night, when suddenly you...Ch. 2 - BIO Nerve Impulses The human nervous system can...Ch. 2 - A finch rides on the back of a Galapagos tortoise,...Ch. 2 - You jog at 9.1 km/h for 5.0 km, then you jump into...Ch. 2 - A dog runs back and forth between its two owners,...Ch. 2 - BIO Predict/Calculate Blood flows through a major...Ch. 2 - BIO Predict/Calculate Blood flows through a major...Ch. 2 - In heavy rush-hour traffic you drive in a straight...Ch. 2 - Predict/Calculate An expectant father paces back...Ch. 2 - The position of a particle as a function of time...Ch. 2 - The position of a particle as a function of time...Ch. 2 - Predict/Calculate A tennis player moves back and...Ch. 2 - On your wedding day you leave for the church 30.0...Ch. 2 - The position-versus-time plot of a boat...Ch. 2 - The position of a particle as a function of time...Ch. 2 - The position of a particle as a function of time...Ch. 2 - Predict/Explain On two occasions you accelerate...Ch. 2 - A 747 airliner reaches its takeoff speed of156...Ch. 2 - At the starting gun, a runner accelerates at1.9...Ch. 2 - A jet makes a landing traveling due east with a...Ch. 2 - A car is traveling due north at 23.6 m/s. 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- During a thunderstorm, a 5.5 s difference between observing a lightening flash and hearing the resultant thunder. How far away in km and mi was the lightening flash? (The speed of sound is 344 m/s)arrow_forwardDuring a thunderstorm, 4.6 s elapses between observing a lightning flash and hearing the resulting thunder. Approximately how far away in kilometers and miles was the lightning flash? (Assume the speed of sound is 344 m/s.)arrow_forwardA bat flying in a cave emits a sound and receives its echo 0.06 s later. Find the distance to the wall of the cave. (hint: the speed of sound, v = 343 m/s)arrow_forward
- (a) A soccer player kicks a rock horizontally off a 39 m high cliff into a pool of water. If the player hears the sound of the splash 3.02 s later, what was the initial speed given to the rock (in m/s)? Assume the speed of sound in air is 343 m/s. 20.013 V 19.8 m/s (b) What If? If the temperature near the cliff suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 3.02 s after kicking the rock? 18.969 V 18.8 m/sarrow_forwardASK YOUR TEACHER (a) A soccer player kicks a rock horizontally off a 38 m high cliff into a pool of water. If the player hears the sound of the splash 2.93 s later, what was the initial speed given to the rock (in m/s)? Assume the speed of sound in air is 343 m/s. m/s MY NOTES (b) What If? If the temperature near the cliff suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.93 s after kicking the rock? Need Help? m/s Read It PRACTICE ANOTHER Watch Itarrow_forwardTrying to determine its depth, a rock climber drops a pebble into a chasm and hears the pebble strike the ground 3.24s later. (a) If the speed of sound in air is 343 m/s at the rock climber's location, what is the depth of the chasm? 51.35 x Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate res accuracy to minimize roundoff error, m (b) What is the percentage of error that would result from assuming the speed of sound is infinite? 0.175 from the henint arh sten carefullyarrow_forward
- A person holds a rifle horizontally and fires at a target. The bullet leaves the muzzle of the rifle with a velocity of 460m/s. Two seconds later the person hears the bullet strike the target. If the speed of sound in air is 340 m/s, calculate the distance travelled from the bullet to the target.arrow_forwardsound waves in air ( v = 343 m/s ) has a frequency of 320 Hz. In ocean water, its wavelength is 4.875 m. What is the speed of sound in seawater? 343 m/s 1005 m/s 1300 m/s 1440 m/s 1560 m/sarrow_forwardA person stands at a point 300 m in front of the face of a sheer cliff. If the person shouts, how much time will elapse before the person hears an echo? (Take the speed of sound to be 344 m/s)arrow_forward
- Helloarrow_forwardSound travels at 1530 m/s in sea water. A signal sent down from a ship is reflected at the bottom of the ocean and returns 1.35 s later. Assuming the speed of sound was not affected by changes in the water, how deep was the ocean at that point?arrow_forwardA soccer player kicks a rock horizontally off a 32 m high cliff into a pool of water. If the player hears the sound of the splash 2.72 s later, what was the initial speed given to the rock (in m/s)? Assume the speed of sound in air is 343 m/s. m/s What If? If the temperature near the cliff suddenly falls to 0°C, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.72 s after kicking the rock? m/sarrow_forward
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