A dragster produces a large sound as it races down the track. If the
power of this sound wave is 1,200 watts, what is the intensity of the
sound heard by the spectators who are 20 meters from the dragster?

Answers

Answer 1
Intensity of sound= Power/Area
Area= m2= 20m * 20 m= 400 m2
I= 1200W/400 m2
I= 3 dB

Related Questions

What does FITT stand for?
Food, Ice cream, Teeth, Toes
Frequency, Ice cream, Time, Teeth
Food, Intensity, Toes, Type
Frequency, Intensity, Time, Type

Answers

Answer:Frequency, Intensity, Time, Type

Explanation: frequency, intensity, time, and type is one way to remember the general guidelines for what should be included in a fitness plan.

In which substance will light move slowest?

Answers

Answer:

light travels slowest in diamond

Explanation:

The higher the index of refraction is, the slower the speed of light is. The indexes of refraction for diamond, air, and glass are, respectively, 2.42, 1.00, and approximately 1.50, depending upon the composition of the glass. Light travels slowest in diamonds.

I know this ain't right but can someone please correct the mistakes I have it for a test​

Answers

Answer:

NICE HANDWRITING. I've done this before and I'm sure everything is correct. Although I would re-check to see if you had any mistakes with your calculations. Good job!

Explanation:

Using a material that is ‘Ohmic’ (it follows Ohm’s Law), you make a circuit using wire, a battery, and a resistor. After measuring V, I, and R across the circuit, you switch out the original resistor with one 3 times more resistive. When you measure V, I, and R again, how will the new values compare to the old?

Answers

When the original resistor is replaced with 3 times more resistive material, the resistance of the circuit increases by factor of 3 and  the current flowing in the cirucit decreases by a factor 3.

Ohm's law

Ohm's law states that, the current flowing in a conductor is directly proportional to the potential across the conductor.

V = IR

where;

I is the current in the circuitV is voltageR is the resistance

When the resistance increases, the current flowing in the circuit decreases.

When the original resistor is replaced with 3 times more resistive material, the resistance of the circuit increases by factor of 3 and  the current flowing in the cirucit decreases by a factor 3.

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Energy is transferred in an electrical circuit through.

Answers

Answer:

Poynting field

Explanation:

magnetic field of currents named the Poynting field, chosen following in position or time the 19th of one hundred years English researcher John Poynting.

A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called a(n) ________ type of system

Answers

A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.

What is speed density fuel injection system?

Speed density fuel injection system is a fuel delivery method.

This system relies on a combination of sensor and an intake air temperature sensor to measure the amount (or mass) of air entering the engine.

Thus, a fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.

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It refers to the condition of the atmosphere in a place over a long period of time.

Answers

Answer:

Climate

Explanation:

conditions of the atmosphere at a particular location over a long period of time; it is the long-term summation of the atmospheric elements

A tourist bus is carrying passengers from the bottom of a hill to the top. the people, the bus, and the luggage can be analyzed as a single . the total amount of energy in the system as the bus travels. this situation happens because some of the kinetic energy changes to energy because of friction between the tires and the road.

Answers

The  friction between the tires and the road causes loss of energy in the form of heat-energy.

What is kinetic energy?

The term kinetic energy refers to the energy of an object that is in motion. The pasengers that are sitting at a point possess potential energy. If the bus stops suddenly, the potential energy of the passengers is converted to kinetic energy as they move forward.

Since friction causes loss of energy, the  friction between the tires and the road causes looss of energy in the form of heat-energy.

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The planets that orbit the sun are large enough that their gravity produces a
________ shape.

Answers

Answer:

a round shape. It has its own gravity to pull itself into a round shape

Your house is 45.0 m from a powerline carrying 152 A of current. How much magnetic field does the current create at your house?

?×10^? T

Answers

This question involves the concepts of th magnetic field and current.

The magnetic field created by the current at the house is "6.75 x 10⁻⁷ T".

Magnetic Field

The magnetic field created by a current carrying wire can be given by the following formula:

[tex]B=\frac{\mu_o I}{2\pi r}[/tex]

where,

B = magnetic field = ?[tex]\mu_o[/tex]= permeabiliy of free space =4π x 10⁻⁷I = current = 152 Ar = distance = 45 m

[tex]B=\frac{4\pi x\ 10^{-7}(152)}{2\pi(45)}[/tex]

B = 6.75 x 10⁻⁷ T

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can someone please help me ​

Answers

Answer:

M a = (M1 + M2) a = F         Newton's Second Law

F = (M2 - M1) g         net force on the system

a = (M2 - M1) / (M1 + M2) g

a = (9 - 7) / (9 + 7) g = 2 / 16 * 10.0 m/s^2 = 1.25 m/s^2

hello people ~
64 drops each having the capacity C and potential V are combined to form a big drop. If the charge on the small drop is q, then the charge on the big drop will be
(a) 2q
(b) 4q
(c) 16q
(d) 64q​

Answers

Answer:

64q

Explanation:

Note that

Charges are addaptive quantities

Here

Capacitance C and potential V is given

We know

Q=CV

So charge is also same

Now

there are 64 drops so 64q charge

please help me I’ll make u brainliest


A 1 liter jar contains 0.5 moles of gas at a pressure of 2 atm. What is the temperature of the gas?


What is the volume of a
container of 4 moles of gas at 200 K with a pressure of 3 atm?


Your scientist friend is trying to figure out how many molecules of gas are in a container. They know that the container has a volume of 5 liters, and they measured the pressure and temperature to be 3.5 atm and 275 K. From this information, what do you tell them the mole measurement should be?


Answers

Explanation:

A)   PV = n RT    

  2*  ( 1)  =  .5 (.082057)(T)       T is in Kelvin

    T = 48.7 K

B) PV = nRT

  3 *  V = 4 ( .082057)(200)

          V = 21.88 Liters

C) PV = nRT

   3.5 (5) = n (.082057)(275)    n = .776 moles

A rock with a mass of 10. 0kg falls 25. 0m to

the ground. What is the work done by the

gravitational force if the weight of the ball

is 98. 0N?

Answers

Answer:

Explanation:Potential Energy is the stored energy of an object given its position relative to a body. Gravitational potential energy is one type of potential energy and is equal to the product of the object's mass (m), the acceleration caused by gravity (g), and the object's height (h) as distance from the surface of the ground (the body).

mass m of 3 kilograms falling at gravity g of 9.81 meter per second squared from a height h of 5 meters. Solve for potential energy Pe with the equation PE equals m times g times h

In this example, a 3 kilogram mass, at a height of 5 meters, while acted on by Earth's gravity would have 147.15 Joules of potential energy, PE = 3kg * 9.81 m/s2 * 5m = 147.15 J.

9.81 meters per second squared (or more accurately 9.80665 m/s2) is widely accepted among scientists as a working average value for Earth's gravitational pull. This figure is based on a measure of gravity at sea level at a latitude of 45°.

At higher altitudes, gravity decreases slightly.

The effect of latitude on gravitational force is relevant as gravity increases with increasing distance from the Equator. At the Equator, the Earth's gravity is 9.780 m/s2 and at the poles it is 9.832 m/s2 (source: CRC Handbook of Chemistry and Physics).

Gravitational acceleration (to three significant figures) for other planets and bodies in the solar system is as follows:

 m/s2 gn*

Sun 274 27.9

Mercury 3.70 0.38

Venus 8.87 0.90

Earth 9.81 1.00

Moon 1.62 0.17

Mars 3.71 0.38

Jupiter 24.9 2.54

Saturn 10.44 1.06

Uranus 8.87 0.90

Neptune 11.15 1.14

Pluto 0.58 0.06

(table source: NASA)

*Standard gravity (gn). 1.00gn is equal to 9.80665 m/s2

Hamish is studying what happens when he sends a sound wave through different mediums, and he records his data in a table. a 2-column table with 4 rows titled hamish's waves. the first column labeled wave has entries 1, 2, 3, 4. the second column labeled information has entries liquid, solid, gas, liquid. which statement could made about the data collected in hamish’s table? wave 1 will move the fastest. wave 2 will move the slowest. wave 3 will move the slowest. wave 4 will move the fastest.

Answers

Answer:

Wave3 = slowest

Explanation:

Wave 3 will move the slowest

in liqiud and solids the molecules are closer together so the waves propogate faster than in a gas

A mass on the end of a spring undergoes simple harmonic motion. At the instant when the mass is at its equilibrium position, what is its instantaneous velocity?.

Answers

Answer:

V = ω A sin ω t       can be used to describe SHM

When sin ω t = 1 (the maximum value possible)

V = ω A          at equilibrium sin ω t = 1

an air track car with a mass off 0.25 kg and velocity of 3.4 m/s to the right collides and couples with a 0.45 kg car moving to the left with a velocity of 3.9 m/s. what is the combined velocity of the cars just after the collision?

Answers

Answer:

Two objects are moving in opposite direction on a straight line. After collision, they stick together and move with common velocity

The total momentum of a colliding system is constant always. Therefore, by using this concept, the final velocity of the coupled mass will be 3.7 m/s.

What is momentum ?

Momentum of an object is the ability of an object to bring the force applied to make a maximum displacement. It is the product of its mass and velocity. Momentum is a vector quantity. It have both magnitude and direction.

The momentum in a collision is conserved. Thus total initial momentum is equal to the final momentum. Let m1 and m2 be the colliding masses and the u and v be the initial and final velocity.

Then, m1 u1 + m2u2 = (m1 + m2)v for a coupled mass after collision.

then final velocity v =  ( m1 u1 + m2u2 )/ (m1 + m2)

Apply the given values in the equation as follows:

v = (0.25 kg ×3.4m/s + 0.45 kg× 3.9 m/s)) (0.45 + 0.25) = 3.7 m/s

Therefore, the final velocity of the coupled masses after collision is  3.7 m/s.

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0.030 m3.
The balloon is compressed at a constant temperature causing the volume
decrease to 0.025 m3.
No helium leaves the balloon.
Calculate the new pressure in the balloon

Answers

Answer:

see below

Explanation:

P1V1 = P2V2

100 000 (.03)  = x ( .025)     x = 120 000 pa

A schema is a cluster of beliefs that allow one to process information about people, emotions, and events. please select the best answer from the choices provided t f

Answers

The statement "A schema is a cluster of beliefs that allow one to process information about people,  emotions, and events." is true. This is further explained below.

What is schema?

Generally, Schema is simply defined as a cluster of beliefs that allow one to process information about Humans, emotions, and events.

In conclusion, a cluster of beliefs that allow one to process information about Humans is a  Schema

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Answer:

true

Explanation:

If you drive an oscillator, it will have the largest amplitude if you drive it at its _______ frequency.

Answers

the answer is resonant frequency

Why do we think that ring particles must be replenished over time? where we think ring particles come from? choose the correct statement.

Answers

Answer:

Because collisions are constantly occurring within the ring systems, ring particles are continually being ground down to dust.

Explanation:

Describe the relationship between current, voltage difference and resistance in a circuit.

Answers

Answer:

see below

Explanation:

voltage = current * resistance

The dimensions of the disk of our milky way galaxy are:.

Answers

Answer:

According to studies, the milky way is approximately, "170,000–200,000 light-years (52–61 kpc) in diameter and, on average, approximately 1,000 ly (0.3 kpc) thick."

With that being said, it is safe to say that the dimensions are somewhere around 100,000 by 1,000

would a sphere shaped eraser bounce

Answers

Yes it would, I’ve tried it before

Make a prediction.
Which surface causes the most friction?
a) wood b) tile c) carpet

Answers

it’s carpet as there isn’t a smooth surface such as wood or tiles, a carpet has a much more in even texture. both wood and tile are much more solid and non mouldable

When astronauts aboard the space shuttle look down at the earth, its atmosphere appears blue. Why?.

Answers

Answer:

Reflection

Explanation:

The particles in the atmosphere only reflect the color blue and and all others are absorbed. Only the reflected colors can be seen from our eyes not the absorbed ones

Hello people ~
The capacitance of a capacitor will decrease if we introduce a slab of:
(a) copper
(b) aluminium
(c) zinc
(d) None of these​

Answers

Answer:

Copper

Explanation:

Capacitance is directly proportional to dielectric constant

Aluminium and zinc are highly reactive and have high dielectric contact.

Copper has less dielectric constant hence capacitance will decrease

19. The frequency of orange light is 5.01 x 10^14 Hz. How much energy does a photon of orange light carry? (h = 6.626 x 10-34 J·s; 1 eV = 1.60 x 10^-19 J)
3.32 eV
5.43 eV
2.07 eV
7.56 eV

Answers

The energy a photon of the orange light carries is 3.32 eV.

What is the energy of a photon?

The energy possessed by the photon incident on a surface is the energy of the photon. It is denoted by [tex]E[/tex].

Energy is related to frequency as

[tex]E=h\nu[/tex]

where h is the plank's constant, [tex]h = 6.626 \times10^{-34} \; \rm Js[/tex]

[tex]\nu=5.01\times10^{14} \:\rm Hz[/tex]

Energy will be

[tex]E= 6.626 \times10^{-34} \times\55.01\times10^{14}\\E=\333.2\times10^{-20} \rm J[/tex]

Given,

[tex]1\rm eV = 1.60 \times 10^{-19} \rm J[/tex]

Energy in eV is

[tex]E=\frac{33.2\times10^{-20}}{ 1.60 \times 10^{-19} \rm J} \\E=3.32 \rm eV[/tex]

Therefore, the energy of the photon in eV is 3.32 eV.

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What is the moment of inertia?
How do you calculate moment of inertia for a mass on a stick?
If a stick has no mass, but it is 3 meters long, and on each end is a 2kg mass, how much inertia does the mass have it if the axis of rotation is perpendicular through the center of the stick?
https://openstax.org/books/university-physics-volume-1/pages/10-5-calculating-moments-of-inertia
the link is supposed to be used for this but im confused so please help and i gotta fill up a whole page with notes except the calculus parts

Answers

stick is like a rod

So

[tex]\\ \rm\Rrightarrow I=\dfrac{ML^2}{12}[/tex]

[tex]\\ \rm\Rrightarrow I=\dfrac{2(3)²}{12}[/tex]

[tex]\\ \rm\Rrightarrow I=\dfrac{9}{6}[/tex]

[tex]\\ \rm\Rrightarrow I=\dfrac{3}{2}[/tex]

[tex]\\ \rm\Rrightarrow I=1.5kgm^2[/tex]

Jasmine makes a note card about series circuits. she records the points shown. a 2 column table with 1 row. the column on the left is labeled advantages with entries (1) they are simple to design and build. the second column is labeled disadvantages with entries (2) each source of current used adds more current to the circuit, (3) the more bulbs are added the dimmer the bulbs are, (4) if one bulb goes out they all go out. which change will correct the error on her note card? switching the headings on the columns adding the title parallel circuits moving point (2) into the advantages column moving point (4) into the advantages column

Answers

Jasmine need to correct the error by switching the headings on the columns adding the title parallel circuits.

What is a parallel circuit?

A parallel circuit is a circuit in which the components are connected to a common junction. This implies that if one bulb goes out in a parallel connection, all the bulbs will go out.

As such, Jasmine need to correct the error by switching the headings on the columns adding the title parallel circuits.

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Write a propotion that can be used to convert 50 meters into kilometers. Then solve Bennett is getting in shape for football season. He runs 400 yards3 times each day for 5 days. Which shows the correct way to find thenumber of miles Bennett will run in 5 days? Circle the letter of thecorrect answer. (1 mile = 1,760 yards)A 400 X 3 X 5 X 1,760B 400 (3 X 5) 1,760C 400 X (3 + 5) 1,760D 400 X 3 X 5 1,760Jory chose A as the correct answer. How did he get that answer? 13d+645 Solve the inequality Hello My friend got a U in citizenship in school and he is wondering what it is and if its bad Solve the system equations! I will give branliest! the side view of a roof is shown below. What is x the height of the roof to the nearest tenth of a foot? cual es el significado de diseccionar? have you watched the movie "hoot" and if you have can you please help me. Some methods that the main characters did not try are?The reasons these methods would have worked better are?please I need help. Thank you 47. Racing cars driven by Chris and Kelly are side by side at the start of a race. The table shows the velocities of each car (in miles per hour) during the first ten seconds of the race. Use the Midpoint Rule to estimate how much farther Kelly travels than Chris does during the first ten seconds. I need help, please! True or False: The price elasticity of demand measure is generally stated as an absolute value. Use a ratio box to solve this problem. Jasons remote-control car traveled 440 feet in 10 seconds. At that rate, how long would it take the car to travel a mile? 10. Which of the following situations represents a proportional relationship?....F. A pizza is $7.95 plus $1.00 for each additional topping.G. A pool fills at a rate of 90 gallons per hour.H. A health club charges a $40.00 membership fee plus $25.00 per month.J. A bank account begins with $350.00 and gains $30.00 per month. What kinds of details should be used to create an effective anecdote? Nathaniel wants to ride his bicycle 23.2 miles this week. He has already ridden 4 miles. If he rides for 4 more days, what is the average number of miles he would have to ride each day to meet his goal? M 7 = ______ m 8 = ______ m 9 = ______ Which of the following does the author represent as an effect of "congregat[ing] in places of high environmental risk" (paragraph 3, sentence 8) ?Opportunities that disproportionately benefit affluent communitiesBFrequent conflict among groups with different cultural valuesDangers that disproportionately affect certain communitiesOvercrowding that exacerbates public health problemsEnvironmental degradation that makes such areas nearly uninhabitableOE When you start to learn ASL, you typically begin signing with the hand that you write with (your dominant hand). Why do you think this is the case? Now, think about your practice routine for ASL. If you had to start practicing signing with your non-dominant hand, what would you need to change about your practice routine? What do you think would be difficult (if anything) about learning how to sign with your non-dominant hand? Darnell bought 6 packs of baseball card. There were 6 cards in each pack Darnell put all his card in card book. He put 9 cards on each page.How many pages of the card book did Darnell use? In how many ways can 6 policemen be assigned to 12 coaches of a passenger train if he must ride in a different coach