Question

1.) At the race track, one race car starts its engine with a resulting intensity level...

1.) At the race track, one race car starts its engine with a resulting intensity level of 107.9 dB at point P. Then 7 more cars start their engines. If the other 7 cars each produce the same intensity level at point P as the first car, what is the new intensity level with all 8 cars running? ____dB

2.) A 96.0-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0°C is 1.20 kg/m3. Speed of sound in air at 20.0°C is 343 m/s. What is the displacement amplitude of a 96.0-Hz sound wave? __ nm

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
At the race track, one race car starts its engine with a resulting intensity level of...
At the race track, one race car starts its engine with a resulting intensity level of 90.6 dB at point P. Then 8 more cars start their engines. If the other 8 cars each produce the same intensity level at point P as the first car, what is the new intensity level with all 9 cars running? Express answer in units of dB
2. From a vantage point very close to the track at a stock car race, you...
2. From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequency that is 0.852 times smaller than that emitted by the car when it is stationary. The speed of sound is 343 m/s. What is the speed of the car? 3.Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human...
From a vantage point very close to the track at a stock car race, you hear...
From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequency that is 0.841 times smaller than that emitted by the car when it is stationary. The speed of sound is 343 m/s. What is the speed of the car? The linear density of the A string on a violin is 2.36 × 10-4 kg/m. A wave on the string has a frequency of...
A stone is dropped from the top of a cliff. The splash it makes when striking...
A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 3.2 s later. How high is the cliff? 2. The pressure variation is a sound wave is given by Δ P = 0.0035 sin (0.38 π x – 1350 π t) Determine a. the wavelength b. the frequency c. the speed and d. the displacement amplitude of the wave. Assume the density of the medium to be 2.2 x...
1. Consider a speaker at some fixed position, emitting sound uniformly in all directions. You are...
1. Consider a speaker at some fixed position, emitting sound uniformly in all directions. You are standing at some distance d from this speaker, holding a sound-intensity measuring device. You then walk 25.0 m in a straight line towards the speaker. At this point you observe that the intensity of the sound has doubled (from the previous location). Determine the distance d. There are no echoes or reflections or interference. 2. You are standing equidistant from four identical jet engines...
1. A cord of mass 0.65 kg is stretched between two supports 8.0 m apart. If...
1. A cord of mass 0.65 kg is stretched between two supports 8.0 m apart. If the tension in the cord is 140 N, how long will it take a pulse to travel from one support to the other? 2. A 50.0 Kg ball hangs from a steel wire 1.00 mm in diameter and 6.00 m long. What would be the speed of a wave in the steel wire? 3. The intensity of an earthquake wave passing through the earth...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT