Identify an environmental hazard that you would like to use for this activity. Explain why you chose this risk.

Explanation:

this is the answer. it's correct

Answer:

The frequency you will hear is 2,639.7 Hz

Explanation:

Given;

source frequency, Fs = 2300 Hz

velocity of the source, Vs = 30 m/s

observed velocity, Vo = 18 m/s

speed of sound in air, V = 343 m/s

Apply Doppler effect, the frequency you will hear is known as observed frequency;

The observed frequency will be greater than the source frequency, since the distance between the source and the observer decreases.

\(F_s = F_0(\frac{V- V_0}{V + V_s} )\\\\2300 = F_0 (\frac{343 - 18}{343 + 30} )\\\\2300 = F_0(\frac{325}{373} )\\\\F_0= 2300(\frac{373}{325}) \\\\F_0 = 2,639.7 \ Hz\)

Note: the aim is to increase the observed frequency.

Subtracting the observed speed from the speed of sound for the numerator will ensure an increase in the observed frequency, also adding the source speed to the speed of sound for the denominator will equally ensure an increase in the observed frequency.

Answer:

the action of investigating something or someone; formal or systematic examination or research.

Explanation:

This definition is provided by Oxford Languages

Answer:

1. v = 30 m/s

2. v = 5 m/s

3. f = 40 Hz

4. f = 400 Hz

5. f = 300 Hz

6. λ = 0.772 m

7. λ = 0.386 m

8. λ = 0.625 m

9. v = 100 m/s

10. v = 50 m/s

Explanation:

The relationship between frequency, wavelength, and speed of a wave is given by the following formula:

\(v = f\lambda\)

where,

v = speed of wave

f = frequency of wave

λ = wavelength

1.

f = 100 Hz

λ = 0.3 m

Therefore,

v = (100 Hz)(0.3 m)

v = 30 m/s

2.

f = 50 Hz

λ = 0.1 m

v = (50 Hz)(0.1 m)

v = 5 m/s

3.

v = 20 m/s

λ = 0.5 m

\(f = \frac{v}{\lambda} = \frac{20\ m/s}{0.5\ m}\)

f = 40 Hz

4.

v = 80 m/s

λ = 0.2 m

\(f = \frac{v}{\lambda}=\frac{80\ m/s}{0.2\ m}\)

f = 400 Hz

5.

v = 120 m/s

λ = 0.4 m

\(f = \frac{v}{\lambda}=\frac{120\ m/s}{0.4\ m}\)

f = 300 Hz

6.

v = 340 m/s

f = 440 Hz

\(\lambda = \frac{v}{f}=\frac{340\ m/s}{440\ Hz}\\\)

λ = 0.772 m

7.

v = 340 m/s

f = 880 Hz

\(\lambda = \frac{v}{f}=\frac{340\ m/s}{880\ Hz}\\\)

λ = 0.386 m

8.

v = 250 m/s

f = 400 Hz

\(\lambda = \frac{v}{f}=\frac{250\ m/s}{400\ Hz}\\\)

λ = 0.625 m

9.

f = 50 Hz

λ = 2 m

v = (50 Hz)(2 m)

v = 100 m/s

10.

f = 100 Hz

λ = 0.5 m

v = (100 Hz)(0.5 m)

v = 50 m/s

Answer:

it B

Explanation:

I KNOW IT

In general, air-source heat pumps are sized to meet the heating and cooling demands of a building.

Air-source heat pumps are versatile heating and cooling systems that can extract heat from the outdoor air and transfer it into a building for heating purposes or remove heat from the indoor air for cooling. The sizing of an air-source heat pump is crucial to ensure that it can adequately meet the heating and cooling requirements of the space it is installed in.The sizing process takes into account factors such as the size and layout of the building, insulation levels, b, desired indoor temperatures, and the heating and cooling load calculations. Heating load calculations consider factors like the outdoor temperature, desired indoor temperature, insulation, air leakage, and more. Cooling load calculations consider factors like solar heat gain, indoor and outdoor temperature differentials, insulation, and more.By accurately sizing the air-source heat pump, it can operate efficiently, maintain comfortable indoor temperatures, and effectively meet the heating and cooling demands of the building. Improper sizing can lead to inefficient operation, inadequate heating or cooling, and increased energy consumption.

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The change of velocity is from 18.5 to 46.1 m/s or 46.1 - 18.5 = 27.6 m/s. The time of change is 2.47 s. So the acceleration is 27.6 m/s / 2.47 s = 11.17 m/s^2. The distance traveled is average velocity times time of travel.

Answer:

Light splits up into different colors because of the electromagnetic spectrum which makes the light bend, wavelength, and it makes different colors by it :3

Explanation:

:3

The wavelength and speed of a wave will be the same regardless of the density of the medium.

The wavelength of a wave is determined by the source and frequency of the wave and is independent of the medium through which it travels. Similarly, the speed of a wave is determined by the properties of the medium, such as its elasticity and inertia, and not directly by its density. Therefore, when comparing the wave characteristics of a wave in two different ropes, the wavelength and speed will be the same irrespective of the density of the medium. The density of the medium may affect other properties of the wave, such as the amplitude or intensity, but not the wavelength and speed.

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Answer:

d. distance travelled

Explanation:

answer

According to the most recent data from satellites making precise measurements of the properties of the cosmic background radiation (CBR), it has been determined that dark energy makes up approximately 68% of the total energy density of the universe.

This means that dark energy is the dominant force driving the acceleration of the expansion of the universe.

The CBR is the afterglow of the Big Bang, and by analyzing its properties, scientists can learn more about the structure and evolution of the universe. The Planck satellite, launched in 2009, has been instrumental in providing high-precision measurements of the CBR and contributing to our understanding of dark energy.

Despite being the dominant force in the universe, dark energy remains a mystery. Its nature and properties are still largely unknown, but it is thought to be a property of space itself rather than a type of matter or energy. Ongoing research and observations will continue to shed light on this elusive phenomenon and deepen our understanding of the universe as a whole.

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Answer:

The spring is compressed by approximately 0.79 meters from its equilibrium position.

Answer:

0.87 g per ml

Explanation:

D=M/V

43.5/50=0.87

Gravity does not affect a parabolic projectile's horizontal velocity. Gravity only affects the vertical component of a projectile's velocity.

The horizontal component of a projectile's velocity remains constant throughout its flight. This is because there are no forces acting on the projectile in the horizontal direction, so there is no acceleration in that direction. However, gravity does affect the vertical component of a projectile's velocity, causing it to accelerate downward at a rate of 9.8 m/s². This downward acceleration causes the projectile to follow a parabolic path.

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the threshold velocity  \(v_{threshold (water) }\)(i.e., the minimum velocity) for creating Cherenkov light from a charged particle as it travels through water is  (0.751) c.

The lowest fluid velocity that, in the case of a spinner flowmeter, would be necessary to start the spinner rotating. Due to extra viscous and mechanical factors, the actual fluid velocity needed to begin spinner spinning is a little greater. The spinner response at higher fluid velocities, where it is known to be nearly linear, is extrapolated back to the value that exists when spinner rotation is zero to calculate the threshold velocity.

The threshold velocity (water) for creating Cerenkov light from a charged particle as it travels through water which is given as -

using an equation, we have

\(v_{threshold (water) }\)=\(\frac{ c }{ n} \Rightarrow \frac{3 \times 10^8 }{ 1.33}\)

\(v_{threshold (water) }\)=2.25 \(\times 10^8\)\(\frac{m}{s}\)

\(v_{threshold (water) }\)= (0.751) c

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Density is a physical property and is measured in a wide variety of units. However, the most suitable measurement unit for density is the kg/m³. The formula to measure the density of an object is given byd = m/VWhere d represents density, m represents mass, and V represents volume.

The units of density will depend on the units of mass and volume. For example, if the mass is measured in kilograms and the volume is measured in cubic meters, the density will be measured in kilograms per cubic meter (kg/m³). The kg/m³ measurement is the most suitable for density because it gives the mass of an object per unit of volume in a standardized form.

In general, density is expressed in terms of mass per unit volume and the SI units of mass and volume are kilograms and cubic meters, respectively. Therefore, the appropriate measurement unit for density is kg/m³.

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The instantaneous velocity of the ball is when $t=2$ is 32 ft/s so the average velocity: 32 ft/s.

The given function is $y=60t-16t^2$. We need to find the average velocity of the ball for the time period beginning when $t=2$ seconds and lasting. The average velocity is calculated by dividing the distance travelled by the time taken. The average velocity for the time period beginning when $t=2$ seconds and lasting 0.5 seconds is calculated as follows:

Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Here, $y_2$ is the value of the function when $t=2.5$ and $y_1$ is the value of the function when $t=2$. Therefore, $y_2=60(2.5)-16(2.5)^2=45$ and $y_1=60(2)-16(2)^2=32$.The time taken is $0.5$ seconds. Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Average velocity = $[\frac{45-32}{0.5}]$Average velocity = $[\frac{13}{0.5}]$Average velocity = $26$ ft/sNow, for the time period beginning when $t=2$ seconds and lasting(ii) 0.1 seconds. Here, $y_2$ is the value of the function when $t=2.1$ and $y_1$ is the value of the function when $t=2$. Therefore, $y_2=60(2.1)-16(2.1)^2=31.84$ and $y_1=60(2)-16(2)^2=32$.The time taken is $0.1$ seconds. Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Average velocity = $[\frac{31.84-32}{0.1}]$Average velocity = $[-1.6]$ ft/s(iii) 0.01 seconds. Here, $y_2$ is the value of the function when $t=2.01$ and $y_1$ is the value of the function when $t=2$. Therefore, $y_2=60(2.01)-16(2.01)^2=31.9364$ and $y_1=60(2)-16(2)^2=32$.The time taken is $0.01$ seconds. Average velocity = $[\frac{y_2-y_1}{t_2-t_1}]$Average velocity = $[\frac{31.9364-32}{0.01}]$Average velocity = $[-6.36]$ ft/s

Finally based on the above results, we can guess that the instantaneous velocity of the ball is when $t=2$ is 32 ft/s. hence, Average velocity: 32 ft/s.

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The centrifugal force C = mv^2/r = kq^2/r^2 = P centripetal force. m is the electron mass, q are the proton and electron charges (opposites), and r is the Bohr radius.

Thus 1/2 mv^2/r = 1/2 kq^2/r^2 and KE = 1/2 mv^2 = 1/2 kq^2/r = 1/2 PE

Therefore KE/PE = 1/2, no matter what state the electron is in.

Within the boundaries of the constellations Coma and Virgo, numerous galaxies can be found. In fact, the Virgo Cluster of galaxies is one of the most prominent galaxy clusters in the nearby universe and contains over 2,000 galaxies.

The Coma Cluster of galaxies is located in the constellation Coma Berenices and is another rich cluster of galaxies that is also studied by astronomers. It contains more than 1,000 galaxies and is one of the most massive structures in the universe.

In addition to these large clusters of galaxies, there are also many individual galaxies within the boundaries of Coma and Virgo. For example, the Sombrero Galaxy (M104) is a prominent galaxy in the constellation Virgo, while the Coma Galaxy Cluster contains many individual galaxies, including NGC 4889, which is one of the largest galaxies known.

Additionally, the Coma Cluster is another notable cluster of galaxies located in this region of the sky. Both of these clusters are important objects of study for astronomers as they offer insights into the formation and evolution of galaxies and galaxy clusters.

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Answer:

answer is 18.6111

you can easily convert km/hr into m/s

just divide it by 3.6

Answer:

melanie ran 8.3 meters per second

Explanation:

I think thats right, hope it helps.

Ionic and covalent bonds are two types of chemical bonds that form between atoms.

An ionic bond forms when one or more electrons are transferred from one atom to another. This results in the formation of positively charged cations and negatively charged anions, which are attracted to each other due to their opposite charges. Ionic bonds typically form between metals and nonmetals. Examples of ionic compounds include sodium chloride (NaCl) and calcium carbonate (CaCO3).

A covalent bond forms when two or more atoms share electrons in order to achieve a more stable electron configuration. This results in the formation of a molecule, where the atoms are held together by the shared electrons. Covalent bonds typically form between nonmetals. Examples of covalent compounds include water (H2O) and carbon dioxide (CO2).

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The electric force between two point charges is 1/6 N.

Given data:

Initial distance between the charges (r1) = 2.0 cm

The new distance between the charges (r2) = 8.0 cm

Initial electric force between the charges - F1 = 1.0 N

Solution:

Lets' say the two charges are q and q2. The formula to calculate electric force between the two charges is given below

F = K |q1| |q2| / r^2

K is a constant.

New electric force can be expressed as

F2/F1 = K |q1| |q2| / r2^2 ÷  K |q1| |q2| / r1^2

F2/F1 = r2^2 / r1^2

After substituting the values we will get

F2 = 1.0 N ( 2.0 / 8.0)^2

F2 = 4/64 N

F2 = 1/16N

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Answer:

B. Not

C. Positively

A. Attraction

This long-term appointment allows them to focus on the stability and effectiveness of the nation's monetary policy without being influenced by short-term political pressures.

Members of the Federal Reserve Board of Governors are appointed for one 14-year term so that they have time to learn how the Fed operates in detail. This allows them to make informed decisions based on economic considerations rather than political ones. The lengthy term also provides continuity and stability to the Board, as well as insulates it from the political pressures that may arise during election cycles.

                                Therefore, the purpose of the 14-year term is to ensure that the Board can act independently and effectively in managing monetary policy and promoting economic stability.
                                     The Federal Reserve Board of Governors. Members of the Federal Reserve Board of Governors are appointed for one 14-year term so that they can make their decisions based on economic, rather than political, considerations. This long-term appointment allows them to focus on the stability and effectiveness of the nation's monetary policy without being influenced by short-term political pressures.

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Answer:

Explanation:

https://web.lemoyne.edu/courseinformation/mth%20112/rinaman/instman/SOLUTION.PDF

Answer:

The magnification produced by a plane mirror is +1

means then the size of the image is equal to the size of the object. If m has a magnitude greater than 1 the image is larger than the object, and an m with a magnitude less than 1 means the image is smaller than the object.

Answer:

Plate Tectonics

Explanation:

Plate tectonics is the scientific theory that the continents move around due to due plate tectonics and the movement of magma under the crust. This explains why some fossils of the same kind are found on other continents, and same goes for the Glacial Marks.

As the electrons are added, the 4s sublevel fills before the 3d sublevel begins to fill, because, according to Aufbau principle, 4s orbitals have lower energy than 3d orbitals.

In order for an atom to exist in its ground state, the Aufbau principle specifies how electrons must be arranged in its atomic orbitals. It says that electrons are inserted into atomic orbitals in ascending sequence of orbital energy level.

Therefore, according to the Aufbau principle, the electrons enter lower energy orbitals first. The energy level of the 4s orbital is lower than the 3d orbital. Due of this, electrons fill 3p but do not enter 3d after entering 4s.

However, electrons in the outermost orbital are lost during ionisation. Electrons from orbital 4s will be ionised first because it is the outermost orbital in this case.

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The problems that arise with the boundaries of a material in effective modeling are the discontinuity of properties and neglect of boundary conditions.

When using an effective means of describing a material, such as the effective medium theory, several problems can arise at the boundaries. These problems stem from the assumptions made in the model, which may not fully capture the complexities of the actual material.

One problem is the discontinuity of properties across the boundary. In the effective model, the material is treated as a homogeneous medium with uniform properties.

However, in reality, there can be sharp changes in properties at the boundaries, such as density, composition, or surface effects. This discontinuity can be expressed mathematically as:

Property (effective) ≠ Property (actual) at the boundary

Another issue is the neglect of boundary conditions. The effective model typically ignores the specific conditions or interactions that occur at the boundaries, such as surface tension, surface roughness, or interfacial phenomena.

These boundary conditions play a crucial role in determining the material's behavior and cannot be overlooked in a comprehensive description.

Mathematically, the neglect of boundary conditions can be expressed as an omission of terms or equations that account for boundary effects in the governing equations or constitutive relations of the material.

To overcome these problems, more advanced modeling techniques, such as finite element methods or boundary element methods, can be employed.

These methods consider the boundary conditions explicitly and provide a more accurate representation of the material's behavior near the boundaries.

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