A train whistle is heard at 250 Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 240 Hz. ▼ What is the speed of the train before slowing down? Express your answer to two significant figures and include the appropriate units. V1 = Part B Value v2 = Units What is the speed of the train after slowing down? Express your answer to two significant figures and include the appropriate units. HA Value ? Units ?

Item 9 Learning Goal: To learn the properties of logarithms and how to manipulate them when solving sound problems. The intensity of sound is the power of the sound waves divided by the area on which they are incident. Intensity is measured in watts per square meter, or W/m². The human ear can detect a remarkable range of sound intensities. The quietest sound that we can hear has an intensity of 10-¹2 W/m², and we begin to feel pain when the intensity reaches 1 W/m². Since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level 3, which is measured in decibels (dB). For a given sound intensity I, B is found from the equation ß = (10 dB) log (1). where Io = 1.0 × 10-¹2 W/m². Part A What is the value of log(1,000,000)? Express your answer as an integer. ► View Available Hint(s) The logarithm of x, written log(x), tells you the power to which you would raise 10…

*42. D A sound wave travels twice as far in neon (Ne) as it does in krypton (Kr) in the same time interval. Both neon and krypton can be treated as monatomic ideal gases. The atomic mass of neon is 20.2 u, and the atomic mass of krypton is 83.8 u. The temperature of the krypton is 293 K. What is the temperature of the neon?

Please

I ran track in high school.  Sometimes spectators would time the races from the stands.  Let's say that the spectator is a distance, d, from the starter.  The spectator (erroneously) starts their timer when they hear the sound from the starting gun.  They should start the timer when they see the smoke from the starting gun.Who can calculate the timing error Δt in terms of d, the speed of sound (vs) and the speed of light (c)? I calculated 6.7 x 10^-7,  with speed of sound = 343 m/s and speed of light = c.  I just wanted to confirm if I was correct.  I used x = x0 + 1/2 (v0 +v)(t).

A Moving to another question will save this response. Question 2 If the speed of sound in air at 0 °C is 331 m/s. What will be the speed of sound in air at 50 °C? 299 m/s 142 m/s 331 m/s 360 m/s None of these. AMoving to another question will save this response. ch 45

An enormous thunderstorm covers Dallas-Ft. Worth. Your best friend Clark is a storm chaser and heads to the center of the storm to take some readings while you stay dry at home. While Clark is at the center of the storm, he sees and hears lightning strike a tree that is 185 m from where he is standing. You are 134 km from the tree. How long does it take for the sound to reach Clark? Assume the speed of sound is 343 m/s. How long does it take for the light to reach you?

QUESTION 40 Which of these expressions yields the speed of sound in air in SI units if the air temperature is 114 degrees Celsius?   a. 331.5 + 0.607 + 114   b. 331.5 + 0.607 times 114

An F1 racecar is speeding around the track at 233 mph when it passes by a seated spectator. The racecar gives off a 10 kHz pitch. If the speed of sound is 344 m/s, what is the frequency of the pitch the spectator hears as the racecar approaches? 1 mi = 1.6 km

30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?