he noisy estabrook stifling team recently adopted a law to reduce the allowed sound level from leaf blowers from the current level of 96 db to 68 db. part description answer save status a. what is the ratio of the new allowed intensity to the previously allowed intensity?
The ratio of the newly allowed intensity to the previously allowed intensity is 3.1623 x 10⁻³.
Banks says a leaf blower makes 64 to 78 decibels at 50 feet. To the operator's ear, the noise is 95-115 decibels. According to Dangerous Decibels, a public-private partnership aimed at reducing hearing loss, typical speech is around 60 decibels, washing machines 75 decibels, and chainsaws 115 decibels.
Performance that fits your needs. Setting the motor to a low speed makes less noise. According to the American Green Zone Alliance, an organization dedicated to zero-emission landscaping, the average fan produces about 65 dB of noise. Compare this to the average noise level of a traditional gas backpack blower.
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guys can anyone explain me atmospheric refraction because I am not getting other concept related to this??????
Answer:
The refraction of light caused by the earth's atmosphere (having air layers of varying optical densities) is called atmospheric refraction. If we look at objects through the hot air over a fire, the objects appear to be moving slightly. The air just above the fire becomes hotter (than the air further up).
What is physical activity?
Answer:
answer is b. any movement that uses your muscles and requires energy
Explanation:
You are pulling your friend on a sled with a constant velocity using a rope held horizontally in the snow. Using a spring scale attached to the rope, you measure the tension to be 0.5000 N. The combined mass of the sled and your friend is 64.00 kg. Determine the magnitude of the surface force the ground exerts on the sled.
Answer:
627.2 N
Explanation:
The Normal Force (N) is the force the ground exerts on the sled, which is equal to the weight (W) of the sled. These forces act in the y direction. The other forces, Tension, Applied Force, Force of Friction all act in the x direction.
N = W = mg = (64.0 kg)(9.8 m/s²) = 627.2 N
how many orbitals are in the 5th principal energy level
Answer:
25
Explanation:
(1 + 3 + 5 + 7 + 9) orbitals = 25 orbitals
An parasailor is traveling at 8 m/s South with the wind blowing at 2 m/s W. What is
the parasailor's resultant velocity?
3.16 m/s 14° W of S
4.47 m/s 14° W of S
8.25 m/s 14. W of S
4 m/s 14 W of S
Answer:
8.25 m/s 14. W of S
Explanation:
The best way to solve this problem is to perform a vector scheme, as vectors can be added We can perform a vector sum to find the resulting velocity by means of the Pythagorean theorem.
In the attached diagram we can see the scheme of the vectors as well as the solution of the problem.
\(v= \sqrt{8^{2}+2^{2} } \\v=\sqrt{68} \\v=8.24[m/s]\\\\the angle\\tan(\alpha )=\frac{2}{8} \\\alpha =14.03\)
Note: The angle measured as West from South, means the angle measured from south to West.
Andy is taking a Dynamic Study Module and answers a question incorrectly. He immediately sees this:
However, he doesn't see the Explanation until he after he has answered several more questions.
Why do Dynamic Study Modules do this?
Dynamic Study Modules delay showing the explanation to give the brain time to engage (or"to give the brain time to store information") in retrieval practice and strengthen its memory of the incorrect answer, which can ultimately enhance long-term retention and learning.
By delaying the explanation, the brain is prompted to engage in retrieval practice, which involves recalling information from memory, thereby strengthening memory traces and facilitating long-term retention. Retrieval practice has been shown to be an effective learning strategy, and Dynamic Study Modules utilize this by providing opportunities for students to practice retrieving information before providing explanations.
This approach encourages active learning and can ultimately enhance students' ability to remember and apply what they've learned.
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What happens to the molecules when the solid changes phase?
they begin to move quickly and can break away from other molecules
Answer:
When solid changes atoms/molecules begin to speed up and move around. Compared to when they are in the solid phase, where they barely move and are slow and are compacted.
Alkaline earth metals have a low density
true
false
true
Explanation:
this is because melting point and boiling point decreases down the group because they are held together by attractions between positive nuclei and delocalised electrons
please help me with this, This is very important for me
Answer:
(a) parallel circuit
(b) (i) ammeter (ii) current
Hope this helps!
A 4.0 kg cat eats cat food of 25 total calories. Those Calories allow it to do 14 Calories of work (some is used in digestion). How high could it climb with that energy?
The height the 4.0 Kg cat can climb, given that ity ate 25 total calories of food is 2.67 m
How do I determine the height?The height the 4.0 Kg cat can climb can be obtained as illustrated below:
The following data were obtained from the question:
Energy (E) = 25 calories = 25 × 4.2 = 105 JMass (m) = 4.0 KilogramsAcceleration due to gravity (g) = 9.8 m/s² Height (h) = ?E = mgh
105 = 4 × 9.8 × h
105 = 39.2 × h
Divide both sides by 39.2
h = 105 / 39.2
h = 2.67 m
Thus, from the above calculation, we can conclude that the height the cat will climb is 2.67 m
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The electrons originally found in ______ are passed to the electron transport chain by _____.
The electrons at the beginning determined in protons are surpassed to the electron shipping chain by using ATP.
Electrons are the smallest of the debris that makes up an atom, and they bring a terrible price. The variety of protons and electrons is identical in a neutral atom. The hydrogen atom, for an instance, has just one electron and one proton. The uranium atom, however, has ninety-two protons, and consequently, 92 electrons.
The electron is a subatomic particle whose electric-powered price is terrible one standard charge. Electrons belong to the first generation of the lepton particle family and are generally idea to be elementary debris because they haven't any recognized components or substructure. Protons and neutrons are made of quarks, but electrons aren't. As distance as we are able to tell, quarks and electrons are essential debris, no longer built out of anything smaller.
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Displacement
► If you walk 4 meters east then 3 meters
north, what displacement did you
travel?
Explanation:
The answer is mentioned above.
Hope it helps.
Carlos does a chin-up in gym class and raises himself 0.8 m. If Carlos has a mass of 62 kg how much work does he accomplish?
Answer:486.1 J
Explanation:
I need Help! Can You Please Help Me?
_______ is essential for building amino acids.
(Choose One)
Nitrogen
Oxygen
Calcium
Carbon
Hydrogen
Phosphorus
Answer:
Oxygen or Hydrogen?
Explanation:
To make amino acids, fermentation tanks are filled with molasses and sugar ingredients such as sugar cane, corn and cassava. Ideal conditions are achieved for stirring, oxygen supply, temperature and pH levels. The desired amino acids are then purified from this fermented broth.
"An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid."
Hope this helps
Which phase of the moon can be observed from Earth when these bodies are positioned in this way?
A.
full moon
B.
first quarther
C.
new moon
D.
waxing gibbous
Why?
Answer:
waxing gibbous
Explanation:
because the moon is before the earth
What is the period of a wave with a wavelength of 8 cm and a frequency of 0.5 hertz?(1 point)
0.125 seconds
2 seconds
4 seconds
0.0625 seconds
Answer:2 seconds
Explanation:
In what ways does Festival dancing help towards Optimizing one's health?
A. Improved physical, mental social and general well being of a person
B. Improved health fitness like heart and lungs condition, muscular strength and endurance, motor and skill fitness
C. Improved balance, coordination and flexibility as well as spatial awareness, agility and mental functioning
D. It can be one way of managing weight status
E. Reduces stress, greater self-esteem, self confidence and better social skills
Answer:E. Reduces stress, greater self-esteem, self confidence and better social skills
Attention i need help with this ASAP NO LINKS!!! its a Science question
What is the correct definition of pressure?
1: weight of the atmosphere
2: gravity per unit area
3: force per unit area
4: force per volume
Answer:
the answer is force per unit area
Compare and Contrast the two main branches of physical science. How are they the same? How are they different?
What do effective healthcare teams look like? What traits do they have? PLEASE HELP ASAP
First to answer right brainliest
Answer:
There traits are= understanding,fast thinkers,reliable/trustworthy,
Answer:
An effective team is a one where the team members, including the patients, communicate with each other, as well as merging their observations, expertise and decision-making responsibilities to optimize patients
State Newton’s first law of motion in your own words.
Answer:
An object in motion will stay in motion until an outside force is acted upon it.An object at rest will stay at rest until an outside force acts upon it.
Explanation:
Answer:
An object in motion will stay in motion until an outside force is acted upon it. An object at rest will stay at rest until an outside force acts upon it.
Explanation:
the maximum force on a force vs. time graph is 400. n and the time interval over which the force acts is from 20 ms - 40 ms. what is the average force exerted on the object?
The average force exerted on the object is equal to the area under the force vs. time graph, which can be calculated as (400 N) x (20 ms) = 8000 Nms. Dividing by the time interval of 20 ms gives an average force of 400 N.
To calculate the average force exerted on the object, we need to find the area under the force vs. time graph during the given time interval. The maximum force on the graph is 400 N and the time interval is from 20 ms to 40 ms. Therefore, the area under the graph can be calculated as the product of the maximum force and the time interval:
Area = (400 N) x (20 ms) = 8000 Nms.
The average force exerted on the object is equal to this area divided by the time interval:
Average Force = Area / Time Interval = 8000 Nms / 20 ms = 400 N
Therefore, the average force exerted on the object during the given time interval is 400 N.
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What factors that affect magnetic force
Answer:
Strong electrical currents in close proximity to the magnet.
Other magnets in close proximity to the magnet.
Neo magnets will corrode in high humidity environments unless they have a protective coating.
Explanation: Heat radiation
Answer: 1 Heat.
2 Radiation.
3 Strong electrical currents in close proximity to the magnet.
4 Other magnets in close proximity to the magnet.
5 Neo magnets will corrode in high humidity environments unless they have a protective coating. Hope this helps. Can I give me brainliest
Explanation:
6. Interpret the following graphs and answer the questions below. a Which sounds have a higher frequency than A? b. Which sounds have a lower frequency than A? c. Which sounds all have the same pitch? d. Which sounds are louder than A? e. Which sound has a higher pitch than A, but is at the same volume? f. How would sound D sound compared to A?
Answer:
a) Frequency is inversely proportional to the wavelength, then the graphs with smaller wavelengths than A have larger frequency than A.
The correct options are: B and C.
b) The opposite as above, in this case the correct options are: D and E.
c) The ones with the same wavelength will have the same pitch:
A and F seems to have the same wavelength.
B and C also seems to have the same wavelength.
d) The vertical height of the peaks are related to the louder sounds, then the sounds louder than A are: B and F.
e) The one that has a higher pitch (or smaller wavelength) and the same amplitude than A is C.
(you need to measure the height of the peaks in both graphs, and see that are equal).
f) D has a larger wavelength than A, so it would sound "lower", and both waves have the same amplitude, so the loudness will be the same.
During anomalous expansion of water ,heat transfer is limited to conduction and radiation only ,explain.
Heat transfer is limited to conduction and radiation only in anomalous expansion of water simply because of the temperature at which the expansion occurs and density
What is anomalous expansion of water?Anomalous expansion of water is a property of water in which water expands instead of contracting.
Anomalous expansion of water makes water less dense. The major effect of this anomalous expansion it will still remain less dense and at the surface of water.Interestingly, this expansion occurs when it is cooled from 4°C to 0°C.Learn more about properties of water:
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How do the phases change when our perspective changes from the Earth to the Moon?
A solid metal ball of radius 1.5 cm bearing a charge of -15 nC is located near a hollow plastic ball of radius 1.9 cm bearing a uniformly distributed charge of -7 nC (see the figure) on its outer surface. The distance between the centers of the balls is 9 cm.Assume the +x axis runs to the right, the +y axis runs up and the +z axis is out.What is the electric field at the center of the metal ball due only to the charges on the surface of the metal ball?
We have that the electric field at the center of the metal ball due only to the charges on the surface of the metal ball is
\(E=7*10^{9}N/C\)
From the question we are told that
A solid metal ball of radius 1.5 cm
bearing a charge of -15 nC is located near a hollow plastic ball of radius 1.9 cm bearing
uniformly distributed charge of -7 nC
The distance between the centers of the balls is 9 cm
Generally the equation for the electric field is mathematically given as
\(E=\frac{kq_2}{d^2}\\\\E=\frac{(9*10^9)7*10^{-2}}{9*10^{-2}}\\\\\)
\(E=7*10^{9}N/C\)
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As cars travel, oil and gasoline leaks onto the road surface. If a light rain falls, what does this do to the control of the car
When a light rain falls after oil and gasoline have leaked onto the road surface, it can cause the car to become less responsive and more difficult to control.
This is because the oil and gasoline act as a slippery layer on the road surface, which reduces the friction between the tires and the road. The rainwater can then mix with the oil and gasoline, making the layer even more slippery and reducing the vehicle's grip on the road.
To help mitigate this issue, drivers should be aware of their surroundings and the potential for slippery surfaces, and should adjust their speed and driving accordingly. Additionally, using tires with greater tread, or using more aggressive tires designed for wet and slippery conditions, can also help increase the vehicle's grip on the road.
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12 A plane starting from rest accelerates at 3 m/s for 25 s. Calculate the
increase in velocity after:
a 1 s
b 5s
C 25 s.
Answer: 78m/s =A
u=0 ,a=3m/sec^2 ,t=25sec
v=u+at
=0+25×3
=75m/s
after 1sec
v=u+at+75
=0+3×1+75
=78m/s
Explanation:
u=0 ,a=3m/sec^2 ,t=25sec
v=u+at
=0+25×3
=75m/s
after 1sec
v=u+at+75
=0+3×1+75
=78m/s