50 6000 divided by 120 to get the answer
The distance at which the sound level is 100 dB is 30m.
<h3>
What is distance?</h3>
Distance is a measurement of how far apart two objects or locations are. Distance in physics or common language can refer to a physical length or an estimate based on other factors (e.g. "two counties over"). |AB| is a symbol that can be used to represent the distance between two points. "Distance from A to B" and "Distance from B to A" are frequently used interchangeably. A distance function or metric is a technique to describe what it means for elements of some space to be "close to" or "far away" from each other in mathematics. It is a generalization of the idea of physical distance. Distance is a non-numerical unit of measurement in psychology and other social sciences.
Explanation:
We anticipate the radial distance to be 10 times greater, or 30 m, when the intensity is reduced by 20 dB, or by a factor of 102. A further 90 dB reduction might translate to an additional factor of 104.5 in terms of distance, or roughly 3030000m or 1000 miles. We measure sound intensity using the inverse square law and the decibel scale definition. According to the sound level definition,
β=10log
We can compute the intensities corresponding to each of the levels mentioned as
a. The power passing through any sphere around the source is
P=4πl
If we ignore absoption of sound by the medium,
conservation of energy requires that
then,
To learn more about distance ,visit:
brainly.com/question/21967820
#SPJ4
Work done is given by product of force and displacement due to that force
So here we will have
here we know that
Now work done is given as
so it will do 16 J work to move the box
Answer:
The standard acceleration due to gravity (or standard acceleration of free fall), sometimes abbreviated as standard gravity, usually denoted by ɡ0 or ɡn, is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth. It is defined by standard as 9.80665 m/s2 (about 32.17405 ft/s2).
Explanation:
The current in the motor is 17.27 A
<h3>What is power?</h3>
power refers to the ability to do work. however as considered in physics is the product if current and voltage. The unit of power is Watts while the unit of current is in Ampere
<h3>What is efficiency?</h3>
efficiency is the ratio of work output to work input expressed in percentage
<h3>how to calculate for current in the motor</h3>
<u>Given data</u>
power output of 2.50hp
efficiency = 90..0%
current = power input / voltage
power input = output power / efficiency
= 2.5 / 90
= 2.778 hp
converting hp to watt gives
2.778 * 746
2072.388 W
current = 2072.388 / 120
current = 17.27 A
Read more on electric current here: brainly.com/question/1100341
#SPJ4