1a. A speaker is playing music at 4.3 W. What is the intensity of the music if the speaker is 0.5 m away from you?          1b. What is the loudness of this speaker?         Speaker A is playing a sound with double the intensity of Speaker B. How much louder is Speaker A than Speaker B?       Speaker A is playing a sound with a quarter of the amplitude of Speaker B. How much louder is Speaker A than Speaker B?    What is the impedance of a wave with a speed of 243m/s and a density of 3.2 kg/m3.        What is the ratio of impedance when Z1 = 3.2 x 103 and Z2 = 1.45 x 102 ?          7a. The ratio of impedance of two substances is 7. What percentage of intensity is transmitted at the boundary?            7b. What percentage of intensity is reflected?

Question
Asked Oct 13, 2019
60 views

1a. A speaker is playing music at 4.3 W. What is the intensity of the music if the speaker is 0.5 m away from you?

 

 

 

 

 

 

 

 

 

 

1b. What is the loudness of this speaker?

 

 

 

 

 

 

 

 

 

  1. Speaker A is playing a sound with double the intensity of Speaker B. How much louder is Speaker A than Speaker B?

 

 

 

 

 

 

 

  1. Speaker A is playing a sound with a quarter of the amplitude of Speaker B. How much louder is Speaker A than Speaker B?

 

 

 

 

  1. What is the impedance of a wave with a speed of 243m/s and a density of 3.2 kg/m3.

 

 

 

 

 

 

 

 

  1. What is the ratio of impedance when Z1 = 3.2 x 103 and Z2 = 1.45 x 102 ?

 

 

 

 

 

 

 

 

 

 

7a. The ratio of impedance of two substances is 7. What percentage of intensity is transmitted at the boundary?

 

 

 

 

 

 

 

 

 

 

 

 

7b. What percentage of intensity is reflected?

check_circle

Expert Answer

Step 1
help_outline

Image Transcriptionclose

1(a)Assume that the speaker is spherical in shape. The equation for the intensity of the sound at a point is given by I 47r Here, I is the intensity of the sound, P is the sound power and r is the distance from the speaker Substitute the numerical values in the above equation 4.3 W 4,T (0.5 m) =1.37 W/m2

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Wave Motion

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: In Section 1.4, we considered the collision of a karate expert’s hand with a concrete block. Based o...

A: Click to see the answer

question_answer

Q: The equivalent capacitance of the two capacitors having equal capacitance connected in parallel is 7...

A: Given that the two capacitors are having equal capacitance, which are connected in parallel .

question_answer

Q: A turntable rotates with a constant 2.25 rad/s2 clockwise angular acceleration. After 4.00 s it has ...

A: Given information:Angular acceleration (α) = 2.25 rad/s2Angular displacement (Δθ) = 30 rad/sTime tak...

question_answer

Q: 25.38     A battery-powered global positioning system (GPS) receiver operating on 9.0 V draws a curr...

A: Given values:Operating voltage, V = 9.0 VDrawn current, I = 0.13 A Consuming time, t = 30 min. = 30 ...

question_answer

Q: A seasoned mini golfer is trying to make par on a tricky number five hole. The golfer can complete t...

A: Given:Horizontal range of the ball (distance between point P and hole) = 1.90 mHeight of the ramp, y...

question_answer

Q: **12. A 3-kg block is held 5 meters directly over an initially uncompressed spring and is dropped st...

A: The mass of the block is 3kg, height is 5m, and displacement 20cm.The total energy of the system is ...

question_answer

Q: Determine the force that you have to exert on the ball to catch it. A friend drops a 0.625-kg basket...

A: Given,

question_answer

Q: Coasting along at 8.60 m/s, a 60.0 kg bicyclist on a 7.60 kg bicycle encounters a small hill. If the...

A: Given information:Weight of the bicyclist (W) = 60 kgWeight of the cycle (w) = 7.60 kgInitial speed ...

question_answer

Q: A 28.0-kg block is connected to an empty 3.00-kg bucket by a cord running over a frictionless pulley...

A: Click to see the answer