Comparison of rarefraction and compression

Answer:

KE = 1/2(m)(v^2)

Explanation:

Answer:

I hope this helps

Explanation:

Answer:

The velocity of the droplet right before it hits the ground is 40.08 m/s.

Explanation:

To determine the velocity of the droplet right before it hits the ground,

From one of the equations of kinematic for free fall motions,

v = u + gt

Where v is the final velocity

u is the initial velocity

g is acceleration due to gravity (take g = 9.8 m/s²)

and t is time

For the question, v is the velocity of the droplet right before it hits the ground.

u = 0 m/s (Since the molten lead was dropped from rest)

Therefore,

v = gt

First, we will determine the time t

Also, from one of the equations of kinematic for free fall motions,

h = ut + 1/2(gt²)

u = 0 m/s

From the question, the molten lead was dropped from the top of the 82.15 m tall tower, therefore

h = 82.15

Hence,

82.15 = 0×t + 1/2 (9.8 × t²)

82.15 = 1/2 (9.8 × t²)

82.15 = 4.9 t²

t² = 82.15/4.9

∴ t = 4.09 secs

Now, for the velocity v, of the droplet right before it hits the ground,

Recall

v = gt

Then,

v = 9.8 × 4.09

v = 40.08 m/s

Hence, the velocity of the droplet right before it hits the ground is 40.08 m/s.

To turn a solution of 1 mole of HF in 1 L of water into an ideal buffer solution, we need to add a weak base. A buffer solution is a solution that can resist changes in pH when small amounts of an acid or a base are added to it.

It is made up of a weak acid and its corresponding conjugate base, or a weak base and its corresponding conjugate acid. In this case, HF is a weak acid, so we need to add a weak base to create its corresponding conjugate base. One option is to add a salt of the weak base. For example, adding sodium fluoride (NaF) to the HF solution will create the conjugate base, F-. The resulting solution will be an ideal buffer solution with a pH close to the pKa of HF (3.17). Another option is to add a strong base, such as NaOH, to the HF solution and titrate it to the desired pH using a pH meter. This will create the conjugate base, F-, as well. However, this method may not be as precise as adding a salt of the weak base. In summary, to turn a solution of 1 mole of HF in 1 L of water into an ideal buffer solution, we need to add a salt of a weak base, such as NaF. Adding a strong base and titrating to the desired pH is also an option, but may not be as precise.

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When the masses of two point masses increase while the distance between them remains constant, the gravitational force between them increases proportionally to the square of the increase in mass.

Gravitational force is the force of attraction between two masses. It is one of the four fundamental forces of nature and is responsible for the motion of celestial bodies, such as planets and stars, as well as the behavior of objects on the surface of the Earth.

The force of gravity between two masses can be described by Newton's law of universal gravitation, which states that every particle in the universe attracts every other particle with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.

The formula for the gravitational force is given by Newton's law of universal gravitation:

F = G * (m1 * m2) / d^2

where:

F is the gravitational force between two masses

G is the gravitational constant (G = 6.67 x 10^-11 N m^2/kg^2)

m1 and m2 are the masses of the two objects

d is the distance between the centers of the two masses.

The gravitational force between two point masses is given by the formula:

\(F = G * (m1 * m2) / d^2\)

where G is the gravitational constant and m1 and m2 are the masses of the two objects.

If the masses of the two point masses are increased from m to 3m, then the new formula for the gravitational force becomes:

\(F' = G * (3m * 3m) / d^2 = 9 * (G * (m * m) / d^2)\)

Thus, the gravitational force between the two point masses is increased by a factor of 9 when the masses are increased to 3m.

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The region from the origin to the elastic limit on an applied force versus elongation graph for a typical metal under tension is referred to as the elastic region.

In this region, the metal behaves elastically, meaning that it can be stretched or deformed under applied force, but will return to its original shape once the force is removed.

The elastic limit is the point at which the metal begins to behave plastically, meaning that it will not return to its original shape after being stretched or deformed.

Beyond the elastic limit, the metal will undergo permanent deformation and may eventually fail.

Understanding the behavior of metals in the elastic region is important for designing structures and products that can withstand applied forces without failing.

The elastic region is the area from the origin to the elastic limit on an applied force versus elongation graph for a typical metal under tension.

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Answer:

please give me brainlist and follow

Explanation:

topographic map

A topographic map shows a three-dimensional representation of a flat surface. It has contour lines joining points of equal elevation; the closer the lines are the steeper the elevation is.

So, the final velocity of the riffle is approximately 5.42 m/s in the opposite direction from the bullet. (Ignore the negative signs, because it just show the direction)

[See on the attached picture to know how to solve it !]

Hi ! Here I will help you to solve the problem about the law of conservation of momentum. Momentum is the condition when an object with mass m moves with velocity v. The momentum of an object will be conserved when it causes a velocity on another object after the collision. Like in the example, when the bullet exits the rifle, it will cause a jolt to the riffle in a direction that opposes the movement of the bullet. Its a normal condition that the velocity of the riffle will have negative (-) value, if we look at the direction of the bullet's motion.

Equations that use the law of conservation of momentum equations depend on the state of the plant. However, in this case, the formula used is :

\(\boxed{\sf{\bold{m_b \cdot v_b + m_r \cdot v_r = m_b \cdot (v_b)' + m_r \cdot (v_r)'}}}\)

With the following condition:

We know that :

What was asked ?

Step by step :

[See on attached picture]

So, the final velocity of the riffle is approximately 5.42 m/s in the opposite direction from the bullet.

It was important to use a volumetric flask in the preparation of salt solutions for analysis because volumetric flasks are designed to accurately measure a specific volume of liquid. The flask has a narrow neck with a mark etched onto it, indicating the exact volume that the flask can hold when filled to that mark. This allows for precise and accurate measurements of the liquid being used in the solution.

In contrast, a beaker is not as accurate in measuring volumes as a volumetric flask. Beakers are designed for approximate measurements and do not have an etched mark indicating a specific volume. Additionally, the wide opening of a beaker can cause some evaporation of the liquid, which can affect the concentration of the solution being prepared. This can result in inaccurate and imprecise measurements, which can lead to errors in the analysis of the solution.

Therefore, a volumetric flask was necessary to ensure that the salt solutions were prepared with the correct volume and concentration. Using a beaker could result in inaccurate measurements and concentrations, which would affect the accuracy and reliability of the analysis.

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Answer:

Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones.

Warm, moist air starts to uplift in the initial stages of thunderstorm development because of a combination of different lift mechanisms.

One of these is convective lift, which occurs when warmer air rises due to its buoyancy. This is because warm air is less dense than cooler air, and so it is more easily displaced by the cooler air. Another lift mechanism is orographic lift, which is the result of air being forced to rise as it moves over a mountain or hill. Finally, frontal lift occurs when a cold front moves into an area of warm, moist air, forcing it to rise. All of these lift mechanisms can combine to cause warm, moist air to be lifted and form a thunderstorm.

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Answer:

The answer is 61.45 °C

Explanation:

Clausius-Clapeyron equation:

P2= Normal pressure

T2= Normal boiling point

ln(p2/p1)=−(ΔHv/R)*(1/T2 − 1/T1)

ln(760/190) = –(31400/8.314)*[(1/T2) – (1/298)]

T2 = 334.6 K = 61.45 °C

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The steady-state amplitude Ao = 50.03 degrees and phase, φ = -88.7 degrees by using the impedance method.

The given equation for vs is:

vs = cos(2phi ft) ...[1]

where, f = 1000 Hz,

therefore ω = 2φf

ω= 2000π radians/s

Let's find the impedance of the circuit elements.

The impedance of the resistor is R.

The impedance of the capacitor is:

Zc = 1/(jωC)

The impedance of the inductor is:

ZL = jωL

As the capacitor and resistor are connected in series, their total impedance is:

ZC+R = R + 1/(jωC) ...[2]

Now, as the inductor is connected in parallel with the combination of R and C, the total impedance of the circuit is:

Ztotal = (ZC+R) || ZL...[3]

Ztotal = (R + 1/(jωC)) || jωL

Ztotal = 1/[(1/R) + j(1/ωC - ωL)]...[4]

Comparing the real and imaginary parts of the equation [4],

we get, 1/R = √{(1/ωC - ωL)^2} ...[5]and

1/ωC - ωL = 0

or

ωL = 1/ωC ...[6]

From equation [5],

we get, R = 1/√{(1/ωC - ωL)^2} ...[7]

The magnitude of the input voltage Vs is 1 volt.

The amplitude of the steady-state output voltage, Vc is given by:

Voc = Ao x 1VoltA0

Voc = R/ZtotalA0

Voc = R/1/[(1/R) + j(1/ωC - ωL)]A0

Voc = R(1/R) + jR(1/ωC - ωL)A0

Voc = 1 + jR(1/ωC - ωL) ...[8]

From equation [6],

we get: L = 1/(ωC)

L = 1/(2π x 1000)

L = 1.59 x 10-7 H

Substituting L in equation [6],

we get: ωL = ωC

ωL = 1/2π x 1000 x 1.59 x 10-7

ωL = 0.1Ω

From equation [7], we get: R = 1000 Ω

Substituting the value of R and ωL in equation [8],

we get: A0 = 1 + j1000(1/2π x 1000 x 1.59 x 10-7 - 0.1)

A0 = √{(1^2) + (-50.03)^2}

A0 = 50.03 degrees

Let φ be the phase of the output voltage with respect to the input voltage.

Therefore, we have: tanφ = -50.03φ = -88.7 degrees

Therefore, Ao = 50.03 degrees and φ = -88.7 degrees.

Answer: Ao = 50.03 degrees, φ = -88.7 degrees.

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The statements that describe a situation with a displacement of zero are (c) Riding on a Ferris wheel whose entrance and exit are the same (d) Walking around the block, starting from and ending at the same house (f) Running exactly one lap around a racetrack.

Riding on a Ferris wheel whose entrance and exit are the same: When you ride on a Ferris wheel that starts and ends at the same point, your net displacement is zero. Although you go through a circular motion and experience changes in position, you ultimately return to the same location.

Walking around the block, starting from and ending at the same house: If you walk around a block and return to the same house from where you started, your net displacement is zero. Regardless of the distance covered or the path taken, the starting and ending points are the same, resulting in zero displacement.

Running exactly one lap around a racetrack: If you run exactly one lap around a racetrack and finish at the same point where you started, your displacement is zero. Similar to walking around the block, the starting and ending positions coincide, resulting in no overall change in displacement.

The other statements do not describe situations with zero displacement. Traveling south then west, riding an escalator, or traveling a certain distance in any direction will result in a non-zero displacement as the starting and ending points differ.

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The work done by a force in moving an electron through a positive potential difference of 2.0 x 10^6V can be calculated using the formula W = q x V, where W is the work done, q is the charge of the electron (which is 1.6 x 10^-19 C), and V is the potential difference. Plugging in the values, we get:W = (1.6 x 10^-19 C) x (2.0 x 10^6V)
W = 3.2 x 10^-13 J

Therefore, the amount of work that would have to be done by a force in moving an electron through a positive potential difference of 2.0 x 10^6V is 3.2 x 10^-13 J.
To calculate the work done in moving an electron through a positive potential difference, you can use the following equation:Work (W) = Charge (q) × Potential Difference (V)
The charge of an electron (q) is approximately -1.6 × 10^-19 Coulombs, and the potential difference (V) given in the problem is 2.0 × 10^6 V.
W = (-1.6 × 10^-19 C) × (2.0 × 10^6 V)
W = -3.2 × 10^-13 Joules
The negative sign indicates that the work done is against the direction of the electric field. Therefore, the work required to move an electron through a positive potential difference of 2.0 × 10^6 V is 3.2 × 10^-13 Joules.

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Answer:

1 km / 15min

Explanation:

The average speed is calculated by simply doing space divided by time so:

2km / 30min that becomes 1km / 15min

Have a good day.

Answer:

0.5 hours or 30 minutes

Explanation:

each hour travels 80km

so, time taken= 40/80 hours

                       = 0.5 hours

                       = 30 minutes

Answer:

111dB

Explanation:

First, find the intensity of the sound using the formula I = Power / 4 x pi x radius ^2

So

60.0 / (4 x 3.14 (6.25)^2)

= 0.122

Then plug that into the equation to find sound level, which is 10log( I / Io)

Io being (1 x 10^-12)

So

10log(0.122 / 1 x 10^-12)

= 111dB

Hope this helps :)

Answer:

D) Move in a opposite direction from the stronger force.

Explanation:

In order to determine the density of a cylinder, we need to know its mass and volume. The mass of the cylinder is given as 29.2 grams, but the volume is not provided. Without the volume, it is impossible to calculate the density of the cylinder.

As for whether or not the cylinder will float in water, that also depends on its density. If the density of the cylinder is less than the density of water (1), then it will float. However, without knowing the density of the cylinder, it is impossible to determine whether or not it will float in water.

Answer:

2. Mathew Maury

Explanation:

2. Mathew Maury

4. Cousteau and Gagnon

Explanation:

they made the first successful scuba in 1942

Answer:

C

Explanation:

Use formable metal flashing:

Answer:

stainless steel

Explanation:

Flashing can be made from many different materials, including metal (copper, aluminum, stainless steel, lead, etc.)

Answer:

can u help me with this too, i currently have it in an assignment and i dont know the answer

Explanation:

The most likely cause of a change in action potential shape is alterations in ion channel activity, which affect the flow of ions across the cell membrane.

Action potentials are electrical signals generated by excitable cells, such as neurons and muscle cells, to transmit information. The shape of an action potential is determined by the coordinated opening and closing of ion channels, which allow the selective passage of ions across the cell membrane. Any disruption in ion channel activity can lead to changes in the action potential shape.

Several factors can cause alterations in ion channel activity. Mutations in ion channel genes can result in dysfunctional channels that fail to open or close properly. This can lead to prolonged depolarization or repolarization phases, resulting in a change in the action potential shape. Additionally, changes in the concentration of ions, such as potassium or calcium, can impact the activity of ion channels, leading to modifications in the action potential waveform.

External factors, such as drugs or toxins, can also influence ion channel activity and subsequently affect action potential shape. For example, certain medications can block specific types of ion channels, altering the membrane potential and changing the action potential morphology. Similarly, toxins produced by bacteria or other organisms can interfere with ion channel function, leading to abnormal action potentials.

In summary, alterations in ion channel activity caused by genetic mutations, changes in ion concentrations, drugs, or toxins are the most likely causes of changes in action potential shape. These disruptions can affect the flow of ions across the cell membrane and result in modifications to the characteristic waveform of action potentials.

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(a) The two possible x - components are 50.67 units or -50.67 units.

(b) The magnitude of the vector added to the original one is 146.85 units.

(a) The magnitude of the resultant vector is calculated as follows;

A = √(x² + y²)

84 = √(x² + (-67)²)

84² = x² + 4489

7056 = x² + 4489

x = ±√(7056 - 4489)

x = ±50.67 units

(b) From A above, let us take the positive value of the x-component and as such our original vector will be;

A = 50.67i - 67j

We want to add another vector to this that would make the resultant to be -80 units in the x direction.

-80^ = (50.67i - 67j) + V

V = -(80 + 50.67)i + 67j

V = -130.67i + 67j

The magnitude of vector V is;

V = √(x² + y²)

V = √(-130.67)² + 67²)

V = 146.85 units

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The complete question is below:

You are given a vector in the xy plane that has a magnitude of 84.0 units and a y-component of -67.0 units.

(a) What are the two possibilities for its x-component?

(b) Assuming the x-component is known to be positive, specify the magnitude of the vector which, if you add it to the original one, would give a resultant vector that is 80.0 units long and points entirely in the negative x-direction.

Answer:

A. 30 yards

Explanation:

40 yards - 10 yards = 30 yards

So he displaced 30 yards. Since no directions are given, I'm guessing that it can be assumed he displaced in a positive direction and not negative. So just 30 yards.

Answer:

d

Explanation:

40 divided by 10 give u 4

Answer:

sorry I don't understand

Explanation:

please translate it in english

Answer:

mechanical wave -> a wave that requires a medium through which to travel

wave -> a disturbance that transfers energy from one place to another place

medium -> the matter that waves flow through

Answer:

Medium - The matter that waves flow through

Mechanical wave - A wave that requires a medium through which to travel

Wave - A disturbance that transfers energy from place to another

.

Hope this helps! <3

a. From the positive plate towards the negative plate.

b. The positive point experiences a force directed opposite to the electric field vector, and the negative point experiences in the same direction.

c. The positive point charge is positive, while the negative point charge is zero.

d. The positive charge decreases as it moves towards the negative plate, while the negative charge remains constant.

a. Inside a parallel plate capacitor, the electric field vector is directed from the positive plate toward the negative plate. This field configuration arises due to the accumulation of a positive charge on the positive plate and an equal amount of negative charge on the negative plate.

The electric field vector lines are parallel and uniformly distributed between the plates.

b. The forces acting on the charges can be determined using the equation F = qE, where F is the force, q is the charge, and E is the electric field. The positive point charge will experience a force opposite to the electric field vector since it carries a positive charge.

Therefore, the force on the positive point charge will be directed toward the positive plate. The negative point charge, carrying a negative charge, will experience a force in the same direction as the electric field vector, towards the negative plate.

c. The potential energy (PE) of a point charge in an electric field can be calculated using the equation PE = qV, where q is the charge and V is the electric potential. In this scenario, the potential energy of the positive point charge will be positive.

This is because the positive point charge is moving from a lower potential (negative plate) to a higher potential (positive plate). On the other hand, the potential energy of the negative point charge is zero, as it is chosen as the zero reference point for potential energy.

In summary, inside a parallel plate capacitor, the electric field vector points from the positive plate to the negative plate. The positive point charge experiences a force towards the positive plate, while the negative point charge experiences a force towards the negative plate.

The potential energy of the positive point charge is positive, indicating a higher potential at the positive plate, while the potential energy of the negative point charge is zero, chosen as the reference point.

As the positive point charge moves towards the negative plate, its potential energy decreases, while the potential energy of the negative charge remains constant.

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