1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
noname [10]
3 years ago
10

A constant tone is being applied to a speaker. The voltage across the speaker is 5 volts. The voltage across the speaker is incr

eased to 15 volts in order to increase the sound level. What is the decibel gain, rounded to the nearest decibel?
Physics
2 answers:
nexus9112 [7]3 years ago
8 0

Answer:

10 do gain

Explanation:

The decibel formula for voltage: db = 20*log(%28%28E1%29%29%2F%28%28E2%29%29)

:

E1 = 15 v; E2 = 5v

:

db = 20*log(%2815%29%29%2F%285%29%29)

:

db = 20*log(3)

:

db = 20 * .47712

:

9.54 db ~ 10 db gain

lubasha [3.4K]3 years ago
5 0

Answer:

decibel gain is 10 db

Explanation:

given data

voltage v1 =  5 volts

voltage v2 = 15 volts

to find out

decibel gain

solution

we have given that 5 volt voltage that is increase to 15 volts

so

we know here decibel gain formula that is

decibel gain = 20 log(v2/v1)   ....................1

put here value of v1 and v2  in equation 1

decibel gain = 20 log(15/5)

decibel gain = 20 log3

decibel gain = 20 × 0.4771

decibel gain = 9.54 db = approx 10 db

so decibel gain is 10 db

You might be interested in
Please. Physics is so difficult.
Softa [21]

Answer:

0.010 m

Explanation:

So the equation for a pendulum period is: y=2\pi\sqrt{\frac{L}{g}} where L is the length of the pendulum. In this case I'll use the approximation of pi as 3.14, and g=9.8 m\s. So given that it oscillates once every 1.99 seconds. you have the equation:

1.99 s = 2(3.14)\sqrt{\frac{L}{9.8 m\backslash s^2}}\\

Evaluate the multiplication in front

1.99 s = 6.28\sqrt{\frac{L}{9.8m\backslash s^2}

Divide both sides by 6.28

0.317 s= \sqrt{\frac{L}{9.8 m\backslash s^2}}

Square both sides

0.100 s^2= \frac{L}{9.8 m\backslash s^2}

Multiply both sides by m/s^2  (the s^2 will cancel out)

0.984 m = L

Now now let's find the length when it's two seconds

2.00 s = 6.28\sqrt{\frac{L}{9.8m\backslash s^2}}

Divide both sides by 6.28

0.318 s = \sqrt{\frac{L}{9.8 m\backslash s^2}

Square both sides

0.101 s^2 = \frac{L}{9.8 m\backslash s^2}

Multiply both sides by 9.8 m/s^2 (s^2 will cancel out)

0.994 m = L

So to find the difference you simply subtract

0.984 - 0.994 = 0.010 m

4 0
1 year ago
Read 2 more answers
What is the sentence that we use to<br> remember how to convert metric<br> prefixes?
Marrrta [24]

Answer:

The mnemonic I can use to memorize the metric prefixes in this order is: Gigantic Monsters Killed One Million Men Napping Peacefully. All right, so again, gigantic monsters killed one million men napping peacefully.

8 0
3 years ago
The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas c
ivann1987 [24]

Answer:

The answer is below

Explanation:

A diver works in the sea on a day when the atmospheric pressure is 101 kPa. The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.

Solution:

Boyles law states that the volume of a given gas is inversely proportional to the pressure exerted by the gas, provided that the temperature is constant.

That is:

P ∝ 1/V;   PV = constant

P₁V₁ = P₂V₂

Given that P₁ = initial pressure = 101 kPa, V₁ = initial volume = 1700 L, P₂ = cylinder pressure, V₂ = cylinder volume = 12 L. Hence:

P₁V₁ = P₂V₂

100 kPa * 1700 L = P₂ * 12 L

P₂ = (100 kPa * 1700 L) / 12 L

P₂ = 14308 kPa

6 0
2 years ago
Use the drop-down menus to show the development of the atomic theory from the oldest theory (1) to the most recent theory (5).
lesya692 [45]

Answer:

4

1

3

5

2

Explanation:

Just took the test

6 0
3 years ago
Read 2 more answers
Jay pushes the box with a force of 25 Newtons. There are 5 Newtons of friction present. In what direction will the box accelerat
yKpoI14uk [10]

Answer: To the right

Explanation:

8 0
1 year ago
Other questions:
  • What are the functions of the female reproductive system?
    5·1 answer
  • Earthquakes along the subduction zones near Sumatra and Chile are some of the strongest in
    15·1 answer
  • A bird flies 3.7 meters in 46 seconds, what is its speed?
    10·1 answer
  • The following chart provides the pH of some common foods. How many would be considered basic?
    15·1 answer
  • What medical technique uses sound wave pulses and their reflections to map structures and organs inside the body?
    10·2 answers
  • Charles is having a lot of problems with errors in a very complicated spreadsheet that he inherited from a colleague, and he tur
    9·1 answer
  • WOULUJUTUL RECIPECUIUS.
    15·1 answer
  • A smooth circular hoop with a radius of 0.800 m is placed flat on the floor. A 0.300-kg particle slides around the inside edge o
    12·1 answer
  • Which two statements are true?
    10·2 answers
  • n an experiment of a simple pendulum, measurements show that the pendulum has length m, mass kg, and period s. Take m/s2 . i. Us
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!