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
Maurinko [17]
3 years ago
7

A student is standing 8 m from a roaring truck engine that is measured at 100 dB. The student moves 4 m closer to the engine. Wh

at is the measured loudness at the new distance?
Physics
2 answers:
mr_godi [17]3 years ago
7 0

The answer is 400 dB.

Evgen [1.6K]3 years ago
6 0
The loudness or sound intensity of the roaring truck engine is inversely proportional to the square of the distance. it follows the law of squares that is 
r1^2 / r2^2 = L2/L1
8^2 / 4^2 = L2 / 100 dB
L2 =  400 dB

The answer to this problem is 400 dB increased frim 100 dB.
You might be interested in
Please help need this asap
NikAS [45]

Answer:

A)  350 N

B)  58.33 N

C)  35 kg

D)  35 kg

Explanation:

If we use that g = 10 m/s^2, then the acceleration of gravity on the Moon will be 10/6 m/s^2 = 5/3 m/s*2

The weight of the object on Earth is given by:

Weight = mass * g = 35 * 10 = 350 N

The weight of the object on the Moon:

Weight = mass * gmoon = 35 * 5/3 = 58.33 N

The mass of the object on Earth is 35 kg

The mass of the object on the Moon is exactly the same as on the Earth (35 kg) since the mass is a quantity inherent to the object and not to its location.

3 0
3 years ago
Explain why filing cabinets are<br>designed so that only one draw<br>can be pulled out at a time.​
natta225 [31]

Answer:

Cabinets are made to open one at a time so that there's not much of space taken up when all the drawers are open. Hope this helps.

7 0
3 years ago
Basketball is my favorite sport!
WARRIOR [948]
Center.........................
6 0
3 years ago
Read 2 more answers
A convex mirror has a focal length of -10.8 cm. An object is placed 32.7 cm from the mirror's surface. Determine the image dista
KonstantinChe [14]

Answer:

-353.16

Explanation:

4 0
3 years ago
The pupil of the human eye can vary in diameter from 2.00 mm in bright light to 8.00 mm in dim light. The eye has a focal length
Zarrin [17]

The indicated data are of clear understanding for the development of Airy's theory. In optics this phenomenon is described as an optical phenomenon in which The Light, due to its undulatory nature, tends to diffract when it passes through a circular opening.

The formula used for the radius of the Airy disk is given by,

y_r=1.22\frac{\lambda f}{d}

Where,

y_r = Range of the radius

\lambda = wavelength

f= focal length

Our values are given by,

State 1:

d=2.00mm = 2*10^{-3}m

f= 25mm = 25*10^{-3}m

\lambda = 750nm = 750*10^{-9}m

State 2:

d=8.00mm = 8*10^{-3}m

f= 25mm = 25*10^{-3}m

\lambda = 390nm = 390*10^{-9}

Replacing in the first equation we have:

y_{r1} = 1.22\frac{(750*10^{-9})(25*10^{-3})}{2*10^{-3}}

y_{r1}= 11.4\mu m

And also for,

y_{r2} =1.22\frac{(390*10^{-9})(25*10^{-3})}{8*10^{-3}}

y_{r2} = 1.49\mu m

Therefor, the airy disk radius ranges from 1.49\mu m to 11.4\mu m

7 0
3 years ago
Other questions:
  • Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ba
    7·1 answer
  • What is the intensity level of a sound with an intensity of 0.000127 W/m2?
    13·1 answer
  • Un electrón en un tubo de rayos catódicos acelera desde el reposo con una aceleración constante de 5.33x10¹²m/s² durante 0.150μs
    10·1 answer
  • For this exercise, use the position function s(t) = −4.9t2 + 250, which gives the height (in meters) of an object that has falle
    10·1 answer
  • Sir Lance a Lost new draw bridge was designed poorly and stops at an angle of 20o below the horizontal. Sir Lost and his steed s
    9·1 answer
  • An object moves on a trajectory given by Bold r left parenthesis t right parenthesis equals left angle 10 cosine 6 t comma 10 si
    12·1 answer
  • If the forces acting on an object are balanced, what must be true about the motion of this object?
    10·2 answers
  • What is the wavelength of a wave traveling with a wave speed of 1348 m/s
    10·1 answer
  • Please help I’ll make u brainliest please
    5·1 answer
  • Drag the tiles to the correct boxes to complete the pairs.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!