An object orbiting the sun in an ellipse can be said to be:.

The sound intensity level of 100 physics professors talking simultaneously is equal to 72 decibel.

Given the following data:

Sound intensity can be defined as a measure of the power of a sound wave per unit area. Thus, sound intensity is a quantity that can be used to measure the energy of sound and its unit of measurement is Watts per square meter.

Mathematically, sound intensity level is given by this formula:

[tex]\beta = 10 log(\frac{I}{I_{ref}} )[/tex]

Note: The reference value of sound intensity is equal to [tex]1.0 \times 10^{-12}\;W/m^2[/tex]

Thus, the sound intensity for one (1) professor is given by:

[tex]I_1 = 1.0 \times 10^{-12} \times 10^{5.2}\\\\I_1=1.585 \times 10^{-7}\;W/m^2[/tex]

For 100 professors, the sound intensity is:

[tex]I_{100} = 1.585 \times 10^{-7} \times 100\\\\I_{100}=1.585 \times 10^{-5}\;W/m^2[/tex]

Substituting the parameters into the formula, we have;

[tex]\beta = 10 log(\frac{1.585 \times 10^{-5}}{1.0 \times 10^{-12}})\\\\\beta = 10 log(15.58 \times 10^{6})\\\\\beta = 10 \times 7.2\\\\\beta =72\;dB[/tex]

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Complete Question:

One physics professor talking produces a sound intensity level of 52 dB. It's a frightening idea, but what would be the sound intensity level of 100 physics professors talking simultaneously?

Answer:

72dB

Explanation:

The sound intensity level of one prof is given, that's your β1 (which is equal to 52dB).

Using the sound intensity level formula:

β1= 10log ([tex]\frac{I}{I_{o} }[/tex]) = 52 dB

*This will be useful later on [even if β1 is known]

Set up the formula for β2 (β2 is going to be the new sound intensity, the one for the 100 profs):

β2 = 10 log( [tex]\frac{ 100 I}{I_{o} }[/tex] )

*You need to multiply the intensity of one professor by 100 (because now there's more)

*do some algebra- pull out the 100

β2  = 10 log (100 [tex]\frac{I}{I_{o} }[/tex])

*use log laws

β2 = 10 ( log(100) + log ([tex]\frac{I}{I_{o} }[/tex]) )

*Now, isn't there a familiar part? Well, yes! The expression for β1!

β2 = 10log(100) + β1

β2 = 10log(100) + 52dB

*use your calculator

β2 = 73dB

^^^ that's your new sound intensity level

Answer:

A light bulb is that component of circuit that lights up when electricity flows through it and vice versa. Its main function is to tell whether electricity is being supplied or not. Its function is also to light up dark places.

Explanation:

Answer:

A light bulb is that component of circuit that lights up when electricity flows

Explanation:

Answer:

Qualitative, Quantitative, Qualitative, Quantitative, and Qualitative.

Explanation:

[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]

Here we go ~

❖ Qualitative data determines the property or characteristics of certain object or behavior.

❖ Quantitative data determines the number or quantity of a substance. basically dealing with how much/many things are being used.

Now let's move on to questions ~

#1. Carbon is a organic molecule.

- Qualitative

#2. The forest is 25% oak trees.

- Quantitative

#3. Water contains covalent bonds.

- Qualitative

#4. Sheila's blood pressure is 120/80.

- Quantitative

#5. The bat arm and human arm have similar bone structure

- Qualitative

Answer:

option 3 potential chemical energy

Answer:

About 59.83 kg

Explanation:

The formula for kinetic energy is [tex]KE = \frac{1}{2}mV^2[/tex], where KE = Kinetic Energy in Joules (J), m = mass in kilograms (kg), and V = Velocity in meters per second (m/s).

In this problem, we are given the Kinetic Energy amount as 193 Joules and the Velocity as 2.54 m/s. Let's plug it into our equation

Now, let's solve this equation.

Step 1: Simplify both sides of the equation.

Step 2: Divide both sides by 3.2258.

1. This type of boundary is called convergent

2. The area where one plate moves under another is called the subduction zone.

Hope that helps!

Answer:

The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense.

Explanation:

The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph.

Answer:

4000 J

Explanation:

x * .125  = 500

x = work input   =   500 / .125 = 4000 J

The specific heat of the substance will be 0.129 J/g°C.

The amount of heat required to increase a substance's temperature by one degree Celsius is known as specific heat capacity.

Similarly, heat capacity is the relationship between the amount of energy delivered to a substance and the increase in temperature that results.

The given data in the problem is;

Q is the amount of energy necessary to raise the temperature = 3,000.0 j

M is the mass=  0.465 kg.

Δt is the time it takes to raise the temperature.=50°c

s stands for specific heat capacity=?

Mathematically specific heat capacity is given by;

[tex]\rm Q= MC \triangle t \\\\ C = \frac{Q}{M\triangle t} \\\\ C = \frac{3000}{0.465 \triangle 50} \\\\ C =129.0 J/Kg^0C \\\\ C= 0.129 J/g^0C[/tex]

Hence the specific heat of the substance will be 0.129 J/g°C.

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Answer:

I believe the answer is transformation

Explanation:

Answer:

3520

Explanation: Force = Mass x Acceleration [∴ or F = ma]. Given values. mass, m = 1600 kg; initial velocity, u = 8 m/s; final velocity, v = 30 m/s; time taken, t = 10 s.

Answer:

is there a picture? so I can understand it more and it will be easier for me to answer. thank you

Answer:

The second one is more accurate because we were able to draw more precisely and accurately, the first picture was more of a general idea of the picture and the second picture was more of a detailed version.

Explanation:

I just did this assignment and this is what I turned in so yeah I hope this is good enough, if you need more of an explanation though ill try to lengthen it. =]

Answer:

W = M g = 150 kg * 9.81 m/s^2 = 1470 N

You were only given 3 significant figures in the question.

The weight of the box is 1471.5 N.

In science and engineering, an object's weight is defined as the force of gravity acting on the thing. Weight is sometimes described as a vector quantity in common textbooks, denoting the gravitational force acting on the item.

Given parameters:

Mass of the box, m = 150 kg.

Acceleration due to gravity, g = 9.8 m/s².

Hence, weight of the box is, W = mg = 150 kg × 9.81 m/s² =1471.5 N.

SO, weight of the  box with a mass of 150 kg on Earth is 1471.5 N.

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The value of resistance that should be used is 244.74 Ohms and the resistor must be connected in parallel.

Given the following data:

A parallel circuit can be defined as an electrical circuit with the same potential difference (voltage) across its terminals.

In order to determine the magnitude of a resistor that should be added to this branch of the circuit, the electrical circuit would be connected as a parallel circuit.

Next, the total effective resistance of this electrical circuit is given by:

RT = (R₁ × R₂)/(R₁ - R₂)

RT = (150 × 93)/(150 - 93)

RT = 13950/57

RT = 244.74 Ohms.

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Answer:

14.9 v

Explanation:

V = IR

The voltages across the resistors will be proprtional to the values of the resistors

45 *  235 / (235 + 475) =

Answer:

1 / f = 1 / i + 1 / o             1 / f = (o + i) / i o

f = i o / (o + i)

f = -26.5 * 8.25 / (8.25 - 26.8)

f = -221 / -.308 = 11.8 cm

Answer:

Drop zone :)

Have a great day!!

Please rate and mark brainliest!!

Answer:

if it was a love story you could call it ¨falling for you¨ hehe though since it's a project I'm guessing it's not a love story lol.

Explanation:

Answer:

As per Provided Information

we have been asked to determine the force applied to stop the car. First we will calculate the acceleration of the car.

[tex] \boxed{\bf \: a \: = \dfrac{(v - u)}{t}}[/tex]

Substituting the value and let's solve it

[tex] \longrightarrow\sf \: a \: = \dfrac{0 - 13}{5} \\ \\ \\ \longrightarrow\sf \: a \: = \cfrac{ - 13}{5} \\ \\ \\ \longrightarrow\sf \: a \: = - 2.6 \: {ms}^{ - 2} [/tex]

Now, let's calculate the force applied to stop the car .

[tex] \pink{\boxed{\bf \: F = ma}}[/tex]

Substituting the value we get

[tex] \longrightarrow \sf \: F = 1400 \times ( - 2.6) \\ \\ \\ \longrightarrow \sf \: F = - 3640 \: N[/tex]

Here , negative sign show that the " Force is acting in opposite direction of the motion"

Therefore,

Answer:

B. has the greatest mass

Explanation:

mass & distance affect pull

grativy affects speed & shape of orbit of the planet

quiziz

Answer:

A ball rolling down a hill

Explanation:

Requires an input of gravitional potential energy

outputs rotational kinetic energy and translational kinetic energy

The processes leading up to the formation of a main sequence star is that gases condense to form a nebula, gravity causes the nebula to collapse.

It should be noted that nebula simply means a stellar nursery where the stars take birth. Also, gases condense to form nebula.

In this case, the processes leading up to the formation of a main sequence star is that gases condense to form a nebula, gravity causes the nebula to collapse and spin.

Lastly, a protostar forms and then nuclear fusion occurs.

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Answer:

80Nm

Explanation:

work done = force x distance

force= 40N, distance = 2m

work done= 40 x 2 = 80Nm

One of the ways in which code of ethics does not vary from each other is ; ( C ) Principle

Code of ethics is a set of written principles that serves as a guideline to ethical behaviors expected from individuals under some form of authority usually at the place of work.

Code of ethics is different from code conduct because code of conduct is a set of rules that oultines the proper practices of individuals at the place of work. The code of ethics vary in autorship, level and purpose.

Hence we can conclude that One of the ways in which code of ethics does not vary from each other is ; ( C ) Principle

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Answer:

Amplitude I believe.....

Explanation:

Answer:

To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

[tex]\sf\huge\underline\blue{Resistor:-}[/tex]

[tex]\rightarrow[/tex]A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.

[tex]\rightarrow[/tex]Resistors reduce the current flow and lower voltage levels within circuits.

[tex]\sf\large\underline\purple{Resistors \:in\: Series:-}[/tex]

[tex]\rightarrow[/tex]A circuit is said to be connected in series when the same amount of current flows through the resistors. In such circuits, the voltage across each resistor is different.

[tex]\rightarrow[/tex]In a series connection, if any resistor is broken or a fault occurs, then the entire circuit is turned off. The construction of a series circuit is simpler compared to a parallel circuit.

[tex]\rightarrow[/tex]For the above circuit(attached image-1), the total resistance is given as:

[tex]\sf{R_{total}\: = \:R1 + R2 + ….. + Rn}[/tex]

The total resistance of the system is just the total of individual resistances.

[tex]\sf\large\underline\purple{Resistors \:in\: Parallel:-}[/tex]

[tex]\rightarrow[/tex]A circuit is said to be connected in parallel when the voltage is the same across the resistors. In such circuits, the current is branched out and recombines when branches meet at a common point.

[tex]\rightarrow[/tex]A resistor or any other component can be connected or disconnected easily without affecting other elements in a parallel circuit.

[tex]\rightarrow[/tex]The figure(attached image -2) above shows ‘n’ number of resistors connected in parallel. The following relation gives the total resistance here

[tex]\sf{\frac{1}{R_{total}}\: = \:\frac{1}{R1} + \frac{1}{R2} + ….. + \frac{1}{Rn}}[/tex]

[tex]\rightarrow[/tex]The sum of reciprocals of resistance of an individual resistor is the total reciprocal resistance of the system.

_______________________________

Hope it helps you:)

Answer:

In a series circuit, the output current of the first resistor flows into the input of the second resistor; therefore, the current is the same in each resistor. In a parallel circuit, all of the resistor leads on one side of the resistors are connected together and all the leads on the other side are connected together.

Answer:

Explanation: