two cars are traveling east. the front car travels 20 m/s and the rear car travels 35 m/s. if the horn from the rear car is 200 hz, what is the frequency heard by the front car.

The payback period is approximately 3.14 years.

To calculate the payback period, we need to find the cost of heat loss before and after filling the window with argon gas. The cost of heat loss can be calculated using the formula:

Cost of heat loss = Heat loss * Heating price

Before filling the window with argon gas, the cost of heat loss is:

Cost of heat loss before = 11 mmbtu/year * $13/mmbtu = $143/year

After filling the window with argon gas, the effective R-value of the window increases from 3 to 8. The heat loss can be calculated using the formula:

Heat loss = Temperature difference / Effective R-value

Assuming the temperature difference across the window is constant, the heat loss after filling the window with argon gas is:

Heat loss after = Temperature difference / 8

The cost of heat loss after filling the window with argon gas is:

Cost of heat loss after = Heat loss after * Heating price

To calculate the payback period, we need to find the time it takes for the cost savings to equal the cost of filling the window with argon gas. The cost savings per year is:

Cost savings per year = Cost of heat loss before - Cost of heat loss after

The payback period can be calculated using the formula:

Payback period = Cost of filling the window with argon gas / Cost savings per year

Plugging in the values, we get:

Payback period = $38 / ($143 - (Temperature difference / 8 * $13))

Assuming a temperature difference of 10°F, we get:

Payback period = $38 / ($143 - (10 / 8 * $13)) = 3.14 years (rounded to two decimal places)

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Answer:

Explanation:

Comment

This depends on your grade level. Because there are only two choices needed, I would say the answer is

But recognize that when something burns, it is because of a change in chemical structure. For example CH4 + 2O2 ===> CO2 + 2H2O

Movement in the example is not as important as what is going on with the Methane Combined with the oxygen.

Answer:potential energy or kinetic energy.

Explanation: potential energy is the energy of position or condition, while kinetic energy is the energy of motion. Both forms of energy are important in understanding and analyzing the behavior and transformations of energy in various systems.

The magnitude of the acceleration of the body is approximately 1.802 m/s^2 when forces of magnitude 5 Newton and 4 Newton act on a body of mass 4.0 kg at a right angle to each other.

To determine the magnitude of the acceleration of a body when two forces act on it at a right angle, we can use the Pythagorean theorem and Newton's second law of motion.Newton's second law states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). In this case, the net force is the vector sum of the two forces acting on the body.Using the Pythagorean theorem, we can find the magnitude of the net force. Let's call the force with magnitude 5 Newton as F1 and the force with magnitude 4 Newton as F2. The net force (Fnet) can be calculated as the square root of the sum of the squares of the individual forces: Fnet = sqrt(F1^2 + F2^2).Now we can substitute the net force into Newton's second law to find the acceleration (a). Rearranging the formula, we have a = Fnet / m.Plugging in the values, Fnet = sqrt(5^2 + 4^2) = sqrt(25 + 16) = sqrt(41) Newtons. The mass (m) is given as 4.0 kg.

Finally, the magnitude of the acceleration of the body is calculated as a = Fnet / m = sqrt(41) / 4.0 ≈ 1.802 m/s^2.

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1/second Equals 1.99 x 10-7 radians. Earth rotates at a rate of 1.99 x 10-7 per second.

If the angles were not approximately 1 one of, then the radius times the angle's measurement in radians, or the width of a arc s = r, would be the ratio of the distance by the point located on the circle. The result of substituting into the linear speed formula is v = r t or v = r t.

A pseudovector used in physics to express how quickly the angular location or orientation of an item changes over time is called an angular velocity or rotational velocity.

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This Process is called Dehydration.

The definition of Dehydration is: The loss or removal of water from something.

so just remember that next time you need something like that <3

Answer: C-Dehydration

Explanation:

Sulfuric acid is also used to prepare other acids and to serve as a dehydrating agent. Dehydrate means to take water away.

Hope this helps!

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The work required to stop the car is 23,756 J

The work required to stop a car is equal to the amount of energy that the car has due to its motion. This energy is called the kinetic energy of the car. The kinetic energy of a car is calculated as the product of the mass of the car and the square of its velocity.

kinetic energy = 1/2 * mass * velocity²

The mass of the car is 1,168 kg and the velocity of the car is 24 km/hr. We will first need to convert the velocity from km/hr to m/s. To do this, we will multiply the velocity by 5/18. So, the velocity of the car is 24 * 5/18 = 6.667 m/s.

We can now calculate the kinetic energy of the car as follows:

kinetic energy = 1/2 * 1,168 * 6.667² = 23,756 J

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To answer this question, it is necessary to apply the static condition from Newton´s Laws

The solution is:

Fd > Fc > Fa > Fb

From the body free diagram, and from the second Newton´s law of movement we get:

∑ Fx  = 0           F - Fr  = 0         F = Fr             Fr = μ×N

∑ Fy  = 0     N = m×g  ⇒   Therefore       Fr = μ×m×g

F = μ×m×g      g is the same in all the cases, then we just compare the products  μ×m

So when F is just greater than Fr, the body will start moving

we make a table, with values from the information table.

1.-  μ×m   =  0.5× 40  = 20

2.-μ×m   =  0.4× 80   = 16

3.- μ×m   = 0.7× 30   = 21

4.- μ×m   = 0.9× 35   = 31.5

According to the table, from highest to lowest the magnitude of the horizontal force is:

Fd > Fc > Fa > Fb

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Answer:

Vectors have both magnitude and direction

Explanation:

Vectors show how strong the force in because the bigger the arrow, the stronger the force.  Also, it obviously shows direction because its an arrow.

Vectors have magnitude and direction while scalars have only magnitude. Vectors are shown using an arrow above the symbol of the quantity and are often printed in bold face.

In Physics, we generally recognize two categories of quantities; vector quantities and scalar quantities.

Vector quantities have both magnitude and direction. It is normal to print vectors in bold face, with an arrow written above the symbol of the quantity. The arrow points in the direction of the vector.

The following are true regarding vectors;

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The car's acceleration is -0.69 m/s² according to the values of variables.

Based on the stated entities, we will be using the equation of motion to solve the question. The formula to be used is -

v = u + at, where v and u are final and initial velocity respectively, a is acceleration and t refers to time. Keep the values in formula -

18 = 24 + a×8.6

Rearranging the equation

a×8.6 = 18 - 24

Perform subtraction

8.6a = -6

a = -6/8.6

Divide the values to know the acceleration

a = -0.69 m/s²

Hence, the acceleration of car is -0.69 m/s².

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The angular momentum of the earth-moon system measured from the center of the earth is approximately 7.07 x 10^33 kg m^2/s. The angular momentum of the earth-moon system can be estimated by multiplying the moment of inertia of the system by the angular velocity.

The moment of inertia for a solid sphere is (2/5)mr^2, where m is the mass of the sphere and r is the radius.

For the earth, the moment of inertia is (2/5)m_eR_e^2, where R_e is the radius of the earth. For the moon, the moment of inertia is (2/5)m_mR_m^2, where m_m is the mass of the moon and R_m is the radius of the moon.

Assuming that both the earth and moon are rotating in the same sense, the angular velocity of the system can be calculated by dividing the angular displacement (2π radians) by the time it takes for one complete revolution, which is the sidereal month of about 27.32 days.

Using the values for the moment of inertia and angular velocity, the angular momentum of the earth-moon system can be estimated as:

L = (2/5)m_eR_e^2ω + (2/5)m_mR_m^2ω

where ω is the angular velocity. Plugging in the values and solving for L, we get:

L = (2/5)m_eR_e^2(2π/27.32 days)

L = (2/5)m_e(6.371 x 10^6 m)^2(2π/27.32 x 24 x 60 x 60 seconds)

L = 7.07 x 10^33 kg m^2/s

Therefore, the angular momentum of the earth-moon system measured from the center of the earth is approximately 7.07 x 10^33 kg m^2/s.

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Answer:   Natural stone

Explanation:

Answer:

Natural stone

Explanation:

The most common natural stones used to make countertops include granite, marble, soapstone, and slate.

First, we need to do a type conversion. Because the types of the two given quantities are different. One is in minutes. The other is in hours. A vehicle that travels \(45\) kilometers in an hour travels how many meters in a second?

A vehicle that travels \(12.5\) meters in a second travels how many meters in \(20\) minutes?

The unit for force is D. N (Newton). It is named after Sir Isaac Newton, a renowned physicist and mathematician who formulated the laws of motion.

Force is a physical quantity that describes the interaction between objects and their ability to cause acceleration or deformation. The Newton (N) is the standard unit for force in the International System of Units (SI). It is named after Sir Isaac Newton, a renowned physicist and mathematician who formulated the laws of motion.

While the options you provided include units such as n (lowercase), kg, nm, and j, none of them represent the standard unit for force. "n" is not a recognized unit for force, "kg" is the unit for mass, "nm" represents the unit for torque (Newton meter), and "j" typically stands for joule, the unit for energy. Therefore, the correct unit for force is the Newton (N).

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Answer:

no sabo por q no mi entender

After considering the given data we conclude that the angular speed w about the polar axis of a point on Earth's surface at a latitude of 35 degrees N is approximately 0.224 radians/hour.

To evaluate the angular speed w about the polar axis of a point on Earth's surface at a latitude of 35 degrees N, we can apply the formula:
\(w = 2\pi /T\)
where:
T = period of Earth's rotation
The period of Earth's rotation is given by:
T = 24 hours / (cos 35°)
Applying substitution of the given values, we get:
T = 24 hours / (cos 35°)
T ≈ 28.02 hours
Applying substitution of the value of T into the formula for w, we get:
\(w = 2\pi /T\)
\(w = 2\pi /(28.02 hours)\)
w ≈ 0.224 radians/hour
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A) The yearly cost to keep a 75-watt bulb burning day and night would be approximately $132.00.

B) The yearly cost of operating your refrigerator, assuming it uses 300 watts and runs 8 hours a day, would be around $87.36.

The yearly cost to keep a 75-watt bulb burning day and night can be calculated by multiplying the power consumption of the bulb in kilowatts (0.075 kW) by the cost of electric power per kilowatt-hour (12.0 cents/kWh) and the number of hours in a year (8,760 hours). The calculation is as follows: 0.075 kW * 12.0 cents/kWh * 8,760 hours = $87.36. This result is rounded to two significant figures.

Similarly, to determine the yearly cost of operating a refrigerator, we need to know its power consumption while running and the daily operating hours. In this case, if the refrigerator uses 300 watts (0.3 kW) and runs for 8 hours a day, we can apply the same calculation: 0.3 kW * 12.0 cents/kWh * 8 hours * 365 days = $87.36.

Understanding these calculations allows individuals to estimate their electricity expenses accurately. By considering the power consumption and duration of usage for various appliances, one can make informed decisions to manage energy consumption effectively and control costs.

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C)1.339 To find the speed of the object at time t=1, we need to calculate the magnitude of the velocity vector. By taking the derivative of the position equations with respect to time, we can obtain the velocity vector. Evaluating the velocity magnitude at t=1 gives us the speed, which is approximately 1.339.

To find the speed of the object at time t=1, we need to calculate the magnitude of the velocity vector. The velocity vector is obtained by taking the derivatives of the position equations x(t) and y(t) with respect to time.

Taking the derivative of x(t) = t*cos(t/2) yields dx/dt = cos(t/2) - (t/2)*sin(t/2).

Similarly, taking the derivative of y(t) = sqrt(t^2 + 2t) gives dy/dt = (t+1)/sqrt(t^2 + 2t).

Now, to find the speed at t=1, we substitute t=1 into the derivatives and calculate the magnitude of the resulting velocity vector.

By evaluating the magnitude of the velocity vector at t=1, we find that the speed of the object is approximately 1.339. Therefore, the correct answer is C) 1.339.

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The following options describe the event horizon:
- A region around a black hole with a radius equal to the Schwarzschild radius.
- A boundary in spacetime wherein events that happen cannot leave.
- The boundary around a black hole wherein light cannot escape.

The event horizon is the point of no return beyond which it becomes impossible for anything, including light, to escape the gravitational pull of a black hole. The size of the event horizon is determined by the mass of the black hole. According to the Schwarzschild radius, the radius of the event horizon is proportional to the mass of the black hole.

This boundary separates the inside of the black hole from the outside universe. Events that occur inside the event horizon are completely cut off from the outside universe, and anything that crosses the event horizon is pulled towards the singularity at the center of the black hole.

The event horizon is an essential concept in black hole physics and plays a vital role in understanding the properties of black holes. It is the outermost region of the black hole where the effects of the gravitational force are apparent, and it separates the inside of the black hole from the outside universe.

In conclusion, the event horizon is a crucial concept in black hole physics, and it is defined as the point of no return beyond which nothing, including light, can escape the gravitational pull of a black hole. A region around a black hole with a radius equal to the Schwarzschild radius, A boundary in spacetime wherein events that happen cannot leave and the boundary around a black hole wherein light cannot escape describe the event horizon.

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At the equilibrium position in SHM, the acceleration of the mass is zero, the speed is at a maximum, and the potential energy is zero. Option C is correct choice.

In simple harmonic motion (SHM), a mass attached to a spring oscillates back and forth around its equilibrium position. At the equilibrium position, the displacement of the mass from its equilibrium position is zero, and the restoring force of the spring is also zero. This means that the mass does not experience any net force at this point, and thus its acceleration is zero.

At the equilibrium position, the mass has maximum speed because it has been accelerated towards the equilibrium position by the restoring force of the spring, and then decelerated by the same force as it passes through the equilibrium position. At this point, all of the potential energy stored in the spring has been converted into kinetic energy. Therefore, the kinetic energy of the mass is a maximum, and the potential energy is zero. Option c is  correct choice.

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Answer:

Pressure means physical force that is another person or object.

Answer:

6km/hr

Explanation:

Lets make a chart

   R.                                G

D  6km.                   6 /2=3km

S.  6/1/1= 12 km/h.    6km/h= 3/1/2  

T  1/2hr                       1/2hr

so 6km/hr hope that helps if it does please mark as brainliest.

Answer:

frequency is equal to the wavelength multiply by the speed of light

Explanation:

wavelength multiply by the speed of light Will give you the frequency

Answer:

\(5.241\ \text{m/s}\)

Explanation:

m = Masa del coche

g = Aceleración debida a la gravedad = \(9.81\ \text{m/s}^2\)

h = Altura = \(1.4\ \text{m}\)

v = Velocidad del automóvil en la parte inferior de la pista

Aquí asumimos que el automóvil desciende verticalmente. La energía potencial del automóvil se completará convertida en energía cinética en la parte inferior de la pista ya que no hay pérdida de energía.

\(mgh=\dfrac{1}{2}mv^2\\\Rightarrow v=\sqrt{2gh}\\\Rightarrow v=\sqrt{2\times 9.81\times 1.4}\\\Rightarrow v=5.241\ \text{m/s}\)

La velocidad máxima que puede alcanzar el coche es \(5.241\ \text{m/s}\).

The photoelectric effect's cutoff wavelength is 295.98 nm. (b) The stopping potential is 2.70625 V if the incident light has a wavelength of 180 nm.

How to get KEmax=|eV0|, the equation for a photoelectron's stopping voltage. Hint: The stopping voltage (or stopping potential) refers to the voltage difference required to stop electrons from passing between plates and creating a flow in the photoelectric analysis.

Derivation of the Photoelectric Effect and the Stopping Potential Formula

According to Einstein's photoelectric equation

(0.6+2.14)eV

1242eVnm

​

=454nm

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The statement "For turbulent flow, the thickness of the laminar sublayer increases as Re increases" is false because as the Reynolds number increases, the overall turbulence intensity in the flow increases causing the thinning of the laminar sublayer.

The Reynolds number is a dimensionless quantity used to predict the onset of turbulence in fluid flow. It is defined as the ratio of inertial forces to viscous forces, given by the formula Re = (ρVD)/μ, where ρ is the fluid density, V is the flow velocity, D is the characteristic length, and μ is the dynamic viscosity.

In turbulent flow, the fluid motion consists of a combination of laminar and chaotic flow patterns. The laminar sublayer is a thin region close to the solid boundary (such as a pipe wall) where the flow remains predominantly laminar, even when the overall flow is turbulent. This is because the velocity of fluid particles near the solid boundary is significantly reduced due to the no-slip condition, making the viscous forces dominant in this region.

As the Reynolds number increases, the overall turbulence intensity in the flow increases, causing higher energy fluctuations to penetrate the laminar sublayer. This results in the thinning of the laminar sublayer as the inertial forces become more dominant over the viscous forces. Therefore, the statement that the thickness of the laminar sublayer increases with increasing Reynolds number is false.

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Answer: 4k

Explanation: I got it right