![andrespeerman](/avatars/11213.jpg)
andrespeerman
25.06.2019 •
Physics
Ahunter is standing on flat ground between two vertical cliffs that are directly opposite one another. he is closer to one cliff than the other. he fires a gun and, after a while, hears three echoes. the second echo arrives 1.05 s after the first, and the third echo arrives 0.827 s after the second. assuming that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, find the distance (in m) between the cliffs.
Solved
Show answers
More tips
- F Food and Cooking 10 Ideas for a Wedding Anniversary Gift...
- H Health and Medicine Hangover: How to Get Rid of It Quickly?...
- S Style and Beauty How to Choose the Right Fur Coat and Avoid Regrets?...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Physics
- P Physics What do nuclear fission and nuclear fusion have in common? A. They start with the same reactants. B. They re both used in power plants. C. Their products have more mass than their...
- P Physics A bullet with a mass 2.25g is fired up into the air with a velocity of 187.5 m/s. What is the maximum height of the bullet...
- P Physics A 1.00 kg block of ice, at -25.0°C, is warmed by 35 kJ of energy. What is the final temperature of the ice?...
- P Physics 2.2.3 quiz: gravity and free fall question 4 of 15 2 points to convert from meters per second to kilometers per second, you need only to multiply by 1,000. o o a. true b. false...
- P Physics In a parallel universe, parallel physicists on a parallel earth picked units of time t], mass [m] and charge [c as their basic three dimensions for their physics. express units...
- P Physics Amonochromatic light of wavelength 506 nm from a distant source is incident on a single slit 0.075 mm wide. diffraction pattern is observed at a distance of 2.0 m. calculate the...
- P Physics How are cosmic rays removed from the final color image? a.they are in the same place in every exposure, so they are easy to find and remove. b.they are the same brightness in...
- P Physics The idealized stirling cycle consists of a reversible closed path of four segments: (i) an isothermal expansion, (i) an isochoric cooling, (iii) an isothermal compression, and...
- P Physics Afuel gas consists of 75% butane (c4h10), 10% propane (c3h8) and 15% butene (c4h8) by volume. it is to be fed to the combustion chamber in 10% excess air at 25ºc, where it is...
- P Physics Ascalloped hammerhead shark swims at a steady speed of 1.5 m/s with its 88 cm -cm-wide head perpendicular to the earth s 56 μt magnetic field. what is the magnitude of the emf...
Ответ:
Answer : distance, d = 463.7 m
Explanation :
According to the given condition it can be assumed that the first echo would be heard from closest cliff. The second echo is from farther cliff and the third echo is from the reflection between the two cliffs.
Let the distance between the first cliff and the point of firing is x and y is the distance between the second cliff and the point of firing.
Then the first echo will travel 2x distance, second will travel 2y distance and third will travel 2x +2y.
So, using above data :
and
On solving :
x = 321.9 m and y = 141.8 m
Hence, total distance between two cliffs is d = 321.9 m + 141.8 m = 463.7 m
Ответ:
B. Water and sugar.
Explanation:
In the given options water and sugar would be the poor conductor of electricity. Other given options such as water and salt, water and Hcl and water and NaOH are better conductor of electricity because Hcl ,NaOH, salt (Nacl) can break into their ionic form whereas water and sugar will not.