17.
2 part question please write out formula
Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same. woman. Assume that the paired sample data is a simple random sample and that the differenc

According to Newton's first law, the object is going to change its motion only when a net external force acts on it.

Sir Isaac Newton proposed three very important laws when it comes to mechanics. The very first law states that 'An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force.' A net external force is, obviously, going to be a force that was previously not there but is recent and is successful in changing the state of rest.

For Example, a ball on a hockey field tends to stay at rest until we hit it with a hockey stick.

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Answer:

70 m.

Explanation:

Given,

Frequency, f = 20 HZ

speed of sound, v = 1400 m/s

wavelength of the waves = ?

we know,

v = f λ

Hence, the wavelength of the wave is equal to 70 m.

Two truckers are traveling directly away from each other at the same speed and one trucker sounds her horn at a frequency of 231 Hz and the other trucker hears a frequency of 214 Hz; thus the speed of the trucks is 25 m/s.


The frequency heard by the second trucker is lower than the frequency emitted by the first trucker, indicating that the trucks are moving away from each other. To calculate their speed, we can use the formula:
speed of sound = frequency x wavelength
where wavelength = speed of sound / frequency.
For the first trucker, the wavelength is:
wavelength = 343 / 231 = 1.485 meters
For the second trucker, the wavelength is:
wavelength = 343 / 214 = 1.603 meters
The difference in wavelengths is equal to the distance the sound waves have to travel extra due to the motion of the second trucker:
delta wavelength = 1.603 - 1.485 = 0.118 meters
As both trucks are moving at the same speed, this distance is equal to twice the distance one truck traveled:
delta wavelength = 2 x distance
distance = delta wavelength / 2 = 0.059 meters
Now we can calculate the speed of the trucks:
speed = distance / time = 0.059 / (1 / 231) = 25 m/s.

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Clint's failure to cite the sentence in his paper is an example of plagiarism.

Plagiarism is the act of using someone else's words, ideas, or work without giving them proper credit. It is considered a serious academic offense and a breach of intellectual integrity.

When Clint wrote the sentence "astronomy is the study of stars, planets, moons, and galaxies" without citing it, he presented it as his own original idea, which is a form of plagiarism.

Citing sources is essential in academic writing for several reasons. Firstly, it acknowledges the original author or creator, giving them the credit they deserve. It demonstrates academic honesty, integrity, and respect for intellectual property. Secondly, citing sources allows readers to locate and verify the information provided, enabling them to delve deeper into the topic if desired.

It also provides a basis for further research and builds upon the existing body of knowledge.

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Network modifiers are elements or compounds that can alter the network structure of a ceramic glass by breaking the covalent bonds and introducing ionic bonds. The addition of network modifiers can decrease the glass transition temperature (Tg) of a ceramic glass.

Network modifiers are elements or compounds that can alter the network structure of a ceramic glass by breaking the covalent bonds and introducing ionic bonds. The addition of network modifiers can decrease the glass transition temperature (Tg) of a ceramic glass. This is because the introduction of ionic bonds disrupts the continuous network of covalent bonds, which lowers the energy required for the molecules to move and transition from a solid-like state to a liquid-like state. Therefore, the more network modifiers added to a ceramic glass, the lower the Tg will be. Conversely, the removal of network modifiers or the addition of network formers (elements or compounds that enhance the network structure) will increase the Tg of a ceramic glass.

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Answer:

point c

Explanation:

the cart has accelerated and is at the lowest point on the path .

consider the acceleration due to gravity converting potential to kinetic energy

Answer:

hello

Explanation:

Answer:

Yes because provided the current is the same.

Answer:

No, it is not necessary for them to have same mass.

Explanation:

Let both bodies have a density d1 and d2 respectively.

Since their volumes are equal V1 = V2

we know that, https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bvolume%7D

Hence, d1 =  and d2 =    

Taking the ratio of densities,we get

This implies that unless the bodies have same densities, the mass of the two bodies will not be same.

The speed of object A at the end of the ramp is approximately 25.39 m/s.

Part (a) The two objects, A (solid cylinder) and B (hollow cylinder), will reach the bottom of the ramp at the same time.

The time it takes for an object to reach the bottom of a ramp depends on its mass distribution and shape, not on whether it is solid or hollow.

In the absence of any other information, we can assume that both objects have similar mass distributions and roll without slipping, resulting in them reaching the bottom of the ramp simultaneously.

Therefore, the answer is 3) They will reach the bottom at the same time.

Part (b) To calculate the speed of object A at the end of the ramp, we can use the principle of conservation of energy.

The potential energy at the beginning of the ramp is converted into kinetic energy at the bottom of the ramp.

The potential energy (PE) at the beginning of the ramp is given by:

PE = m * g * h

where m is the mass of object A, g is the acceleration due to gravity, and h is the height of the beginning of the ramp.

Mass of object A (m) = 340 g = 0.34 kg

Radius of object A (r) = 31 cm = 0.31 m

Height of the beginning of the ramp (h) = 41 cm = 0.41 m

Acceleration due to gravity (g) = 9.8 m/s²

The potential energy at the beginning of the ramp is:

PE = 0.34 kg * 9.8 m/s² * 0.41 m

PE ≈ 1.375 J

At the bottom of the ramp, the potential energy is fully converted into kinetic energy:

KE = 1/2 * I * ω²

where I is the moment of inertia of the object and ω is the angular velocity.

For a solid cylinder, the moment of inertia is given by:

I = (1/2) * m * r²

Substituting the given values:

I = (1/2) * 0.34 kg * (0.31 m)²

I ≈ 0.0169 kg·m²

Since the object rolls without slipping, the linear speed (v) can be related to the angular velocity (ω) by the equation:

v = ω * r

Solving for ω:

ω = v / r

The linear speed at the end of the ramp is equal to the radius times the angular velocity.

Substituting the values:

v = (1.375 J / 0.0169 kg·m²) * 0.31 m

v ≈ 25.39 m/s

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Answer:

True

Explanation:

please give brainliest

Answer:

Explanation:

the concept of potential difference is useful because it gives information about the energy available to push the current in the electric circuit.

Answer: C

Explanation:

The magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.

Force is an external agent applied on any object to displace it from its position. Force is a vector quantity, so with magnitude it also requires direction. Direction is necessary to examine the effect of the force and to find the equilibrium of the force.

Now here in the question three forces, A, B, and C, are acting on the same object with magnitudes a, b, and c, respectively. Force A acts to the right, force B acts to the left, and force C acts downward.

The force C must be greater than the two forces A and B acting on the right and left side of an object, It is because the resultant of the force will move object downward if the force at C will be greater then the other two forces.

Hence the magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.

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Given:

The current density is,

a is a constant, and the radius of the wire is R.

To find:

The current in the wire

Explanation:

The current in the wire is,

We know,

So,

Hence, the required current is,

Answer:

i belive it should be C

Explanation:

The relationship between Linear Expansivity and Cubic Expansivity is as follows: Cubic / Volume expansivity = 3 Linear expansivity

Now, consider a sheet of metal of Length (l), Breadth (b), and Height (h). Let the initial Length be (l₁), the initial Breadth be (b₁) and the initial Height be (h₁). Let the final Length be (l₂), the final Breadth be (b₂) and the final Height be (h₂) after the metal is heated through a temperature change of θ.

Considering,

the initial volume of the metal be V₁ = l₁*b₁*h₁

and, the final volume of the metal be V₂ = l₂*b₂*h₂

Then,

Using the formula of linear expansivity,

l₂ = l₁ (∝∆θ + 1 )

b₂ = b₁ (∝∆θ + 1 )

h₂ = h₁ (∝∆θ + 1 )

Remember that Volume = l * b*h

Therefore,

V₁ = l₁*b₁*h₁

V₂ = l₂*b₂ *h₂

V₂ =l₁ (∝∆θ + 1 ) * b₁ (∝∆θ + 1 ) * h₁ (∝∆θ + 1 )

V₂ = l₁* b₁*h₁ (∝∆θ + 1 ) * (∝∆θ + 1 ) * (∝∆θ + 1 )

V₂ = l₁* b₁*h₁ ((∝∆θ * (∝∆θ + 1 ) + 1 * (∝∆θ + 1 ) ) * (∝∆θ + 1 )

Let's open the brackets, now we get,

V₂ = l₁* b₁*h₁(∝²(∆θ)² + ∝∆θ + ∝∆θ + 1 ) * (∝∆θ + 1 )

V₂ = l₁* b₁*h₁(∝²(∆θ)² + 2∝∆θ +1 ) * (∝∆θ + 1 )

V₂ = l₁* b₁*h₁(∝²(∆θ)² * (∝∆θ + 1 ) + 2∝∆θ * (∝∆θ + 1 ) +1* (∝∆θ + 1 ) )

V₂ = l₁* b₁*h₁(∝³(∆θ)³ +∝²(∆θ)² + 2∝²(∆θ)² + 2∝∆θ +∝∆θ + 1 )

V₂ = l₁* b₁*h₁(∝³(∆θ)³ +∝²(∆θ)² + 2∝²(∆θ)² + 3∝∆θ + 1 )

V₂ = V₁(∝³(∆θ)³ + 2∝²(∆θ)² + 3∝∆θ+1 )

Remember that ,

V₂ = V₁ ( ϒ * ∆θ + 1 )

Let us substitute for V₂ in the above formula. Then we will get,

V₁ ( ϒ * ∆θ + 1 ) = V₁(∝³(∆θ)³ + 2∝²(∆θ)² + 3∝∆θ+1 )

ϒ * ∆θ + 1 = ∝³(∆θ)³ + 2∝²(∆θ)² + 3∝∆θ+1 (V₁ canceled V₁ and the brackets are removed)

ϒ * ∆θ = ∝³(∆θ)³ + 2∝²(∆θ)² + 3∝∆θ ( 1 cancelled 1 )

At this point,∝ tends to be zero because its value starts from 0.0000... Upward. Therefore,∝² and ∝³ are approximately zero. i.e. ∝² and ∝³ are = 0.

Therefore, we put zero in place of ∝² and ∝³. Now we get,

ϒ * ∆θ = 0*(∆θ)³ + 2*0*(∆θ)² + 3∝∆θ

ϒ * ∆θ = 0 + 0 + 3∝∆θ

ϒ * ∆θ = 3∝∆θ

ϒ = 3∝ ( ∆θ cancelled. ∆θ )

Therefore,

Cubic / Volume expansivity = 3 Linear expansivity

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Answer:

The option that best describes the relationship between frequency and wavelength of electromagnetic waves is the third option

c. The frequency increases as the wavelength decreases

Explanation:

The frequency of an electromagnetic wave, 'f', is given by the following formula;

\(Frequency, \, f = \dfrac{Wave \ Speed,v }{Wavelength, \ \lambda}\)

From the above formula, the frequency of an electromagnetic wave is inversely proportional to the wavelength, and therefore, a higher frequency, ('f', to increase), requires a lower wavelength, (λ, decreases)

The correct option is that the frequency of an electromagnetic increases as the wavelength of the wave decrease.

Therefore, the sample of aluminum chloride (AlCl3) with a mass of 37.2 g contains approximately 0.279 moles.

To find the number of moles of aluminum chloride (AlCl3) in a sample with a mass of 37.2 g, we can use the formula:

moles = mass / molar mass

First, we need to find the molar mass of aluminum chloride (AlCl3).

The molar mass is the sum of the atomic masses of all the atoms in a molecule.

For aluminum chloride (AlCl3), we have one aluminum atom (Al) with a molar mass of 26.98 g/mol, and three chlorine atoms (Cl) with a molar mass of 35.45 g/mol each.

So, the molar mass of AlCl3 is:

molar mass = (1 * atomic mass of Al) + (3 * atomic mass of Cl)
molar mass = (1 * 26.98 g/mol) + (3 * 35.45 g/mol)
molar mass = 26.98 g/mol + 106.35 g/mol
molar mass = 133.33 g/mol

Now that we have the molar mass of AlCl3, we can calculate the number of moles.

moles = mass / molar mass
moles = 37.2 g / 133.33 g/mol

Dividing 37.2 g by 133.33 g/mol gives us:

moles = 0.279 moles

Therefore, the sample of aluminum chloride (AlCl3) with a mass of 37.2 g contains approximately 0.279 moles.

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Answer:

A) half the original force

The justification for the citizens' concerns is that "leaks or punctures in the pipeline could cause large explosions". Option C is ansswer.

It justifies the concerns of the citizens regarding the new natural gas pipeline. Natural gas is a highly flammable substance, and if there are any leaks or punctures in the pipeline, it can lead to the accumulation of gas and potentially result in dangerous explosions. This poses a significant risk to the safety of the people living in the vicinity of the pipeline.

Options A, B, and D do not directly address the safety concerns associated with the pipeline. Option A discusses the inconvenience of driving and working around the above-ground pipeline but does not highlight any safety issues. Option B states that natural gas is more expensive than petroleum, which is unrelated to the safety concerns of the citizens. Option D claims that natural gas is a very dirty form of energy, but this does not directly address the potential risks and hazards associated with the pipeline.

Therefore, option C, "Leaks or punctures in the pipeline could cause large explosions," is the correct answer as it justifies the concerns of the citizens regarding the safety implications of the natural gas pipeline.

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If the amount demand of a product changes more than proportionally as its price rises or falls, then it is said to be elastic.

The more replacements there are for an item, more elastic the good is, according to definition of an elastic good, which is where change in price results in a large movement in demand. Price elasticity of demand is determined by dividing percentage change in quantity required by the percentage change in price.

Products like cars, appliances, and luxury items that are rarely purchased are examples of elastic commodities. In the event that the cost of these products is momentarily high, consumers may decide to put off buying.

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Answer:

F = q V X B

Using the right hand rule (right hand screw) turn V into B to get direction of force which in this case is down

If V is east and F is down then one can see that B must be directed towards  the south - turn V into B (south) and F will be directed downwards.

When you create a best-fit line, the expected value of the slope represents the average rate of change in the dependent variable (y) for every unit increase in the independent variable (x). The slope helps you make predictions and understand the relationship between the two variables in your dataset.

When you create a best-fit line, the expected value of the slope is the coefficient that represents the rate of change between the two variables being analyzed. The slope is determined by finding the ratio of the change in the dependent variable to the change in the independent variable.

It is important to note that the slope of a best-fit line is not always a perfect representation of the true relationship between the variables, but rather an approximation based on the available data. Therefore, the expected value of the slope is subject to variation and uncertainty depending on the specific data set and methodology used to create the best-fit line.
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When a sound source produces waves, the frequency of the waves determines the pitch of the sound. In this scenario, the sound source is producing 1.20-khz waves. However, the sound source is also moving towards a stationary listener at one-half the speed of sound. This means that the waves will be compressed as they travel towards the listener, resulting in a higher frequency.

To calculate the frequency that the listener will hear, we can use the formula:

f' = f (v +/- v_observer) / (v +/- v_source)

Where:
f = frequency of the sound source (1.20 kHz in this case)
v = speed of sound in air (approximately 343 m/s)
v_observer = speed of the observer (0 m/s since they are stationary)
v_source = speed of the source (one-half the speed of sound, or approximately 171.5 m/s)

Plugging in the values, we get:

f' = 1.20 kHz * (343 m/s + 0 m/s) / (343 m/s - 171.5 m/s)
f' = 2.14 kHz

Therefore, the listener will hear a frequency of 2.14 kHz instead of 1.20 kHz. This is because the sound waves are compressed as they travel towards the listener due to the motion of the sound source.

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The ball will be in the air for approximately 5.39 seconds on Mars.

To approximate how long the ball will be in the air on Mars, we can use the following kinematic equation:

h = v*t + (1/2)a\(t^2\)

where h is the maximum height the ball reaches, v is the initial velocity (m/s), a is the acceleration due to gravity (m/s^2), and t is the time the ball is in the air.

On Mars, the acceleration due to gravity is 3.71 \(m/s^2\). We can assume that the initial height of the ball is zero.

Using the given initial velocity of 10 m/s, we can solve for the maximum height the ball reaches:

h = \(v^2\)/(2a) = \(10^2\)/(23.71) = 13.45 meters

Now we can use the same kinematic equation to solve for the time the ball is in the air. We set h = 0 (since we are interested in the time it takes to return to the ground):

0 = v*t + (1/2)a\(t^2\)

Simplifying and solving for t, we get:

t = 2v/a = 210/3.71 = 5.39 seconds

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Answer:

read this it might help some

When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force. When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater momentum change.

Explanation:

Iron,

I really hope this helped you

Explanation:

Answer:

Its just Cork and wax

Explanation:

I just did it on edge trust me

Answer:

a constabt force that acts on object that rub together

Explanation:

It is because Friction is the rubbing of one body against another body

The magnification of the astronomical telescope formed by combining two converging lenses of focal lengths 100 cm and 10 cm is 10.

The magnification of an astronomical telescope can be calculated as the ratio of the focal length of the objective lens to the focal length of the eyepiece lens. In this case, the objective lens has a focal length of 100 cm and the eyepiece lens has a focal length of 10 cm. Therefore, the magnification is 100/10 = 10.  

This means that the telescope will make distant objects appear 10 times closer than they actually are. For example, if an object is 1000 meters away, it will appear as if it is only 100 meters away through the telescope.  

It is important to note that while the magnification is important, other factors such as the aperture size and quality of the lenses also affect the performance of a telescope.

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Let's determine what happens when you add batteries in series.

There are two major ways to wire batteries together which are:

Series and arallel.

A circuit can be said to be in series when there is the same curent flowing through all the components in the circuit.

In a series circuit, when you add a battery, the voltage increases while the supply voltage is divided among the components in the circuit.

Therefore, when you add batteries in series, the voltage is divided among the bulbs equally.

ANSWER:

It is divided among the bulbs.