Friction between a surface and air or a liquid is call.... friction​

The configurational entropy, S, when two Ar atoms absorb on this patch of the surface can be calculated using the formula:

Since there are 9 accessible adsorption sites on the patch of the surface and only one atom can bind at each site, the number of possible arrangements of the two Ar atoms can be calculated using the combination formula where n is the total number of sites (9), r is the number of atoms (2)

This can be calculated using the formula for combinations: Now, we can calculate the configurational entropy (S) using the Boltzmann's entropy formula By calculating W using the combinations formula and then plugging the result into the Boltzmann's entropy formula, we find that the configurational entropy is 3.99 x 10-23 J/K.

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An envelope of plasma surrounding the sun describes the solar feature shooting off into space labeled C.

Near sunspots, the magnetic field lines frequently rearrange, cross, and tangle. A solar flare, which is a quick explosion of energy, may result from this. A lot of radiation is sent into space during solar flares.

Given, Image of the sun with three solar properties labeled A, B, and C.

Label A points to lit particles shooting outward from and then coming back toward the sun's surface.

Point A represents prominence.

Label B points to a region on the sun's surface that is bright.

Point A represents a Solar flare.

Label C points to the layer of the sun's atmosphere.

Point C represents Corona. Corona is a luminous envelope of plasma that surrounds the Sun and other celestial bodies. It is extended to millions of kilometers into space and is commonly seen during a total solar eclipse.

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Complete question:

Answer: the answer is a

Explanation:

Yes, it will be safe to have the turbine component operate at 1150°C

Based on the given information, the melting temperatures of iron and titanium are 1538°C and 1668°C, respectively. In an iron-titanium alloy, these two elements are combined, resulting in an intermediate melting temperature. This alloy would have a higher melting temperature than pure iron and lower than pure titanium.

Operating the turbine engine at 1150°C would be safe, as this temperature is significantly below the melting temperatures of both elements. It provides a sufficient margin of safety for the alloy, ensuring that it remains solid and stable during operation. Additionally, alloys typically have improved mechanical properties, such as increased strength and resistance to wear, compared to their constituent elements. This makes iron-titanium alloys suitable for high-temperature applications like turbine engines.

In summary, using an iron-titanium alloy for a turbine engine operating at 1150°C should be safe and appropriate due to its enhanced mechanical properties and melting temperature range.

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Answer:

See Explanation

Explanation:

Given

\(s=s_0+v_0t+\frac{a_0t^2}{2}+ \frac{j_0t^3}{6}+\frac{S_0t^4}{24}+\frac{ct^5}{120}\)

Solving (a): Units and dimension of \(s_0\)

From the question, we understand that:

\(s \to L\) --- length

\(t \to T\) --- time

Remove the other terms of the equation, we have:

\(s=s_0\)

Rewrite as:

\(s_0=s\)

This implies that \(s_0\) has the same unit and dimension as \(s\)

Hence:

\(s_0 \to L\) --- dimension

\(s_o \to\) Length (meters, kilometers, etc.)

Solving (b): Units and dimension of \(v_0\)

Remove the other terms of the equation, we have:

\(s=v_0t\)

Rewrite as:

\(v_0t = s\)

Make \(v_0\) the subject

\(v_0 = \frac{s}{t}\)

Replace s and t with their units

\(v_0 = \frac{L}{T}\)

\(v_0 = LT^{-1}\)

Hence:

\(v_0 \to LT^{-1}\) --- dimension

\(v_0 \to\) \(m/s\) --- unit

Solving (c): Units and dimension of \(a_0\)

Remove the other terms of the equation, we have:

\(s=\frac{a_0t^2}{2}\)

Rewrite as:

\(\frac{a_0t^2}{2} = s_0\)

Make \(a_0\) the subject

\(a_0 = \frac{2s_0}{t^2}\)

Replace s and t with their units [ignore all constants]

\(a_0 = \frac{L}{T^2}\\\)

\(a_0 = LT^{-2\)

Hence:

\(a_0 = LT^{-2\) --- dimension

\(a_0 \to\) \(m/s^2\) --- acceleration

Solving (d): Units and dimension of \(j_0\)

Remove the other terms of the equation, we have:

\(s=\frac{j_0t^3}{6}\)

Rewrite as:

\(\frac{j_0t^3}{6} = s\)

Make \(j_0\) the subject

\(j_0 = \frac{6s}{t^3}\)

Replace s and t with their units [Ignore all constants]

\(j_0 = \frac{L}{T^3}\)

\(j_0 = LT^{-3}\)

Hence:

\(j_0 = LT^{-3}\) --- dimension

\(j_0 \to\) \(m/s^3\) --- unit

Solving (e): Units and dimension of \(s_0\)

Remove the other terms of the equation, we have:

\(s=\frac{S_0t^4}{24}\)

Rewrite as:

\(\frac{S_0t^4}{24} = s\)

Make \(S_0\) the subject

\(S_0 = \frac{24s}{t^4}\)

Replace s and t with their units [ignore all constants]

\(S_0 = \frac{L}{T^4}\)

\(S_0 = LT^{-4\)

Hence:

\(S_0 = LT^{-4\) --- dimension

\(S_0 \to\) \(m/s^4\) --- unit

Solving (e): Units and dimension of \(c\)

Ignore other terms of the equation, we have:

\(s=\frac{ct^5}{120}\)

Rewrite as:

\(\frac{ct^5}{120} = s\)

Make \(c\) the subject

\(c = \frac{120s}{t^5}\)

Replace s and t with their units [Ignore all constants]

\(c = \frac{L}{T^5}\)

\(c = LT^{-5}\)

Hence:

\(c \to LT^{-5}\) --- dimension

\(c \to m/s^5\) --- units

Answer:

6 kilograms

Explanation:

force (N) = mass (kg) × acceleration (m/s²).  an object of constant mass accelerates in proportion to the force applied. If the same force is applied to two objects of different mass, the heavier object has less acceleration than the lighter object. Divide the newtons by the rate of acceleration, which will give you the mass of the object. The mass will be in kilograms, because a single newton represents the amount of force needed to move one kilogram one meter.

Answer:

c is the answer

hope it helped :)

Answer: C or B

Explanation: They both relate to the same thing

Answer:

\(\huge\boxed{\sf F= 350 \ N}\)

Explanation:

Considering pivot as the central point,

Key:

\(F_1r_1=F_2r_2\)

Here,

Substitute the givens in the above formula.

\(F(1.2)=600(0.7)\\\\F(1.2)=420\\\\Divide \ 1.2 \ to \ both \ sides\\\\F=420/1.2\\\\F= 350 \ N\\\\\rule[225]{225}{2}\)

A) 4π radians did the carousel rotate through.

B) v=rω, v =2*20 = 40 m/s is the tangential velocity of the carousel at a point 2 m from the center of the carousel.

C) α =ω²r = 20²× 5 = 2000 rad/s² is the angular acceleration of the carousel during this time.

D)  the tangential acceleration of the carousel at a point on the outside of the platform is zero cause a(t) = r dω/dt change in angular velocity is zero after it reaches 20 rad/s.

A carousel, also known as a merry-go-round (international), roundabout (British English), or hurdy-gurdy (an archaic phrase in Australian English), is a type of amusement attraction that consists of a spinning circular platform with seats for passengers. Traditional "seats" are rows of wooden horses or other animals set on poles, many of which are moved up and down by gears to mimic galloping to the tune of looping circus music. carousel rotates with a particular velocity.

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a) Tina drives approximately 69.93 meters before passing David.

b) Her speed as she passes him is approximately 34.77 m/s.

To find the distance Tina drives before passing David, we can use the equation:

\(\[d = ut + \frac{1}{2}at^2\]\)

where:

d is the distance traveled,

u is the initial velocity (0 m/s for Tina),

a is the acceleration (2.90 m/s² for Tina), and

t is the time.

First, we need to determine the time it takes for Tina to catch up with David. Since David is driving at a constant speed of 31.0 m/s, the time Tina needs to catch up can be found using the equation:

\(\[t = \frac{d}{v}\]\)

where:

\(\(t\)\)  is the time,

\(\(d\) \\\) is the initial distance between Tina and David (0 m), and

v  is the relative velocity of Tina with respect to David (31.0 m/s).

Substituting the values, we find:

\(\[t = \frac{0\,m}{31.0\,m/s} = 0\,s\]\)

Since Tina begins to accelerate at the instant when David passes, she starts from rest and requires no time to catch up.

a) Using the equation for distance, we find:

\(\[d = ut + \frac{1}{2}at^2 = 0 + \frac{1}{2}(2.90\,m/s²)(0\,s)^2 = 0\,m\]\)

Therefore, Tina does not drive any distance before passing David.

b) Since Tina catches up with David at the same instant he passes, her speed is equal to his speed. Thus, her speed as she passes him is approximately 31.0 m/s.

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Tina drives approximately 158.2 meters before passing David. Tina's speed as she passes David is 31.0 m/s.

To find the distance Tina drives before passing David, we need to determine the time it takes for Tina to catch up with David first. We can use the equation:

d = v0t + 0.5at2

Where d is the distance, v0 is the initial velocity, a is the acceleration, and t is the time. Rearranging the equation to solve for t:

t = (v - v0) / a

Substituting the given values:

t = (0 - 31.0 m/s) / (-2.90 m/s²)

t ≈ 10.69 seconds

To find the distance:

d = v0t + 0.5at2

d = 0 + 0.5(-2.90 m/s²)(10.69 s)2

d ≈ 158.2 meters

Therefore, Tina drives approximately 158.2 meters before passing David.

To find Tina's speed as she passes David, we can use the equation:

v = v0 + at

Substituting the given values:

v = 0 m/s + (2.90 m/s²)(10.69 s)

v ≈ 31.0 m/s

Therefore, Tina's speed as she passes David is 31.0 m/s.

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The length of its sides in kilometers is \(0.000290 km\)

What is celestial mechanics?

Celestial mechanics is a scientific discipline that studies the motion and behavior of celestial bodies, including planets, moons, asteroids, comets, and stars, using principles and laws of physics. It focuses on understanding the gravitational interactions between celestial objects and how they influence their orbits, positions, and movements in space.

\(\textbf{(a) Pressure Calculation:}\)

To find the pressure, we can use the ideal gas law equation, which states:

\(\[ PV = nRT, \]\)

where \($P$\) is the pressure, \($V$\) is the volume, \($n$\) is the number of moles of gas, \($R$\) is the gas constant and \($T$\) is the temperature.

In this case, the number of moles (\($n$\)) is given as 1 mol, the gas constant (\($R$\)) is a known value, and the temperature (\($T$\)) is given as \(2.7 K\). However, we need to determine the volume (\($V$\)) in order to calculate the pressure.

\(\textbf{(b) Volume Calculation:}\)

The volume occupied by 1 mol of gas can be calculated using Avogadro's Law, which states that equal volumes of gases at the same temperature and pressure contain an equal number of particles. One mole of any gas at standard temperature and pressure (STP) occupies a volume of 22.4 liters

\((22.4 L) \\or\\ 0.0224 cubic meters (0.0224 m$^3$).\)

\(\textbf{(c) Length Calculation:}\)

If the volume is a cube, and we know the volume is \(0.0224 m$^3$\), we can calculate the length of its sides by taking the cube root of the volume. Therefore, the length of each side is:

\(\[ \text{Length} = \sqrt[3]{\text{Volume}} = \sqrt[3]{0.0224} \approx 0.290 \, \text{m}.\]\)

To convert this length to kilometers, we divide by 1000:

\(\[ \text{Length in kilometers} = \frac{0.290 \, \text{m}}{1000} = 0.000290 \, \text{km}.\]\)

Therefore, the length of its sides in kilometers is \(0.000290 km\)

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Because the refractive indexes of the immersion oil and the glass microscope slide are the same; the oil prevents the refraction of the incoming light rays.

An invisible space is present between the slide and the lens that contains air.

When the light rays fall on the slide and lens they might get refracted due to air present between them.

If the rays get refracted then the diameter of the objective lens will expand further.

So in order to prevent the refraction of light, it is very important to lubricate the surface of the lens because glass and oil have same refractive index and without oil the light rays refract from their original path.

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To calculate the magnitude of the linear momentum for each of the cases, you need to use the following equation:

Linear momentum (p) = mass (m) x velocity (v)

Case (a): Linear momentum (p) = 1.67 x 10-27 kg x 5.00 x 106 m/s = 8.35 x 10-22 kg m/s

Case (b): Linear momentum (p) = 0.015 kg x 300 m/s = 4.5 kg m/s

Case (c): Linear momentum (p) = 75.0 kg x 10.0 m/s = 750 kg m/s

Case (d): Linear momentum (p) = 5.98 x 1024 kg x 2.98 x 104 m/s = 1.78 x 1029 kg m/s

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Answer:

250 N

Explanation:

\(a = \frac{vf - vi}{t} \)

Vf=final velocity

Vi =initial velocity

=70-20/2=25m/s^2

F=ma

=10kg * 25m/s^2

=250N

Answer:

The Sun's gravitational force is like the tetherball rope, in that it constantly pulls Earth toward it. Earth, however, like the tetherball, is traveling forward at a high rate of speed, which balances the gravitational effect. ... Instead, it travels in a nearly circular motion around the Sun, creating an orbit.

Answer:

Explanation:

Yep

A hockey puck can transfer kinetic energy by

When a hockey player hits the puck with their stick, they transfer kinetic energy to the puck.

The puck then moves across the ice, and if it collides with another object (such as the boards or another player's stick), some of the kinetic energy from the puck is transferred to that object through touch.

This demonstrates that kinetic energy can move from one item to another and that energy transfers from materials through touch.

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The required density of the liquid cannot be determined from the given information.

Pressure is defined as the ratio of force to the area of the cross-section.

Here,
The density of the liquid cannot be calculated from the given information because there is no direct relationship between the pressure of a gas and the density of a liquid.

The density of a liquid is affected by factors such as its temperature, pressure, and composition. Therefore, we would need additional information, such as the mass or volume of the liquid, or its temperature and pressure, to calculate its density.

Thus, the density of the liquid cannot be determined from the given information.

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Answer:

Nuclear energy comes from splitting atoms in a reactor to heat water into steam, turn a turbine and generate electricity. Ninety-three nuclear reactors in 28 states generate nearly 20 percent of the nation's electricity, all without carbon emissions because reactors use uranium, not fossil fuels.

Answer:

Explanation:

on volleyballit's clockwise and What Would Happen If Someone Served Out Of Order? If the wrong player on your team serves because it's not their turn, the point and the possession of the serve will go to your opponents.

The creation of space between particles with opposing charges is known as charge separation, sometimes known as static electricity.

When the positive and negative charges are out of balance, static electricity is produced. While electrons like to hop all over the place, protons and neutrons don't move around very much. A negative charge is present when an object (or person) possesses more electrons. A common electric phenomena called static electricity occurs when charged particles are transmitted from one body to another. For instance, when two insulators are rubbed together and the air around them is dry, the resulting charges are equal and opposite to one another. The term "static electricity" describes an imbalance of electric charges in a body, more precisely, the imbalance of negative and positive charges.

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"The energy source that contributes to the greatest emissions of gases in the environment during the energy production process is fossil fuels." The correct option is B.

Fossil fuels, such as coal, oil, and natural gas, release large amounts of carbon dioxide (CO₂) and other pollutants into the atmosphere when burned for energy production. CO₂ is the primary greenhouse gas responsible for climate change and global warming. In addition, the extraction and transportation of fossil fuels also results in emissions of methane and other pollutants.

While nuclear energy (c) produces minimal emissions during energy production, the mining and processing of nuclear fuel can result in emissions of greenhouse gases.

Solar energy (d) and biofuels (a) are considered to be cleaner sources of energy, as they produce much lower emissions of greenhouse gases and other pollutants during energy production. However, the manufacturing and transportation of solar panels and biofuel crops can result in emissions of greenhouse gases.

Therefore, the energy source that contributes to the greatest emissions of gases in the environment during the energy production process is fossil fuels.

The given question is incomplete. The complete question is 'a. bio fuels

b. fossil fuels

c. nuclear energy

d. solar energy'

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The recoil speed of the cannon after firing the cannonball is 0.0061 m/s.

To determine the recoil speed of the cannon, we can use the principle of conservation of momentum. According to this principle, the total momentum before the firing must be equal to the total momentum after the firing.

Given that the cannonball is fired horizontally, the vertical components of momentum are negligible. Therefore, we only need to consider the horizontal momentum.

The initial momentum of the system (cannon and cannonball) is zero since both are at rest. After the cannonball is fired, it gains momentum in one direction, causing the cannon to recoil in the opposite direction.

The magnitude of the momentum gained by the cannonball is given by:

momentum of cannonball = mass of cannonball × velocity of cannonball

Since the cannonball is not provided in the question, we cannot calculate this value directly. However, we can determine the recoil speed of the cannon using the mass of the cannonball.

By setting the momentum gained by the cannonball equal to the recoil momentum of the cannon, we can solve for the recoil velocity of the cannon.

Recoil momentum of the cannon = momentum of cannonball

recoil velocity of the cannon × mass of the cannon = mass of cannonball × velocity of cannonball

recoil velocity of the cannon = (mass of cannonball × velocity of cannonball) / mass of the cannon

Plugging in the given values, assuming the mass of the cannonball is 1 kg and the velocity of the cannonball is 200 m/s, and the mass of the cannon is 1300 kg:

recoil velocity of the cannon = (1 kg × 200 m/s) / 1300 kg

recoil velocity of the cannon ≈ 0.0061 m/s

Therefore, the recoil speed of the cannon after firing the cannonball is approximately 0.0061 m/s.

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Answer:

Pressure = 40Pa

Force = 80N

Surface area = ?

Pressure = Force/Surface area

hence Surface area = Force/Pressure

Surface area = 80N/40Pa = 2m^2.

Answer:

Its angular acceleration is zero.

Explanation:

If the angular velocity of an object (in this case the toy) is constant, then its angular acceleration will be zero. Why? Because angular acceleration is the time rate change of angular velocity. Since there is no change, this brings the answer to zero.

13.The color with the longest wavelength is option A. Red.

14.The sky appears blue due to option D. Scattering of light.

Red light has a longer wavelength compared to yellow and blue light.The color that has the longest wavelength is red. The color of the sky appears blue due to scattering of light. The distance between one peak and the next in a series of waves, particularly electromagnetic waves traveling through space or along a wire is referred to as wavelength.

The wavelength of light, for example, determines its color. Red light has the longest wavelength, followed by orange, yellow, green, blue, and purple, with violet light having the shortest wavelength. When light is reflected off a surface or passes through a medium, it can be deflected in various directions, a phenomenon known as scattering of light.

The Earth's atmosphere scatters sunlight in all directions, but the shorter blue wavelengths are scattered more than the longer wavelengths. As a result, we perceive the sky as blue during the day.  The light becomes scattered when it interacts with particles in the atmosphere, causing the sky to appear blue during the day and red during sunset or sunrise. The scattering of light is the process that causes the sky to appear blue.

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F=ma

Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour per second, millimeters per second2, etc.) could certainly be used as well - the calculation is the same regardless.

The statements which are correct about calculating LaToya's mechanical advantage are—The input force is 50 N, the output force is 450 N and the mechanical advantage is 10.Therefore, the correct option is A, D and E.

Mechanical advantage is the ratio of output force to input force. In this case, LaToya is using a force of 50 N to pull a cart that weighs 500 N. The output force is the weight of the cart minus the force LaToya exerts on it:

Output force = 500 N- 50 N = 450 N

To see why statement F is incorrect, note that the formula for mechanical advantage is:

Mechanical advantage = output force / input force

Substituting the values we found earlier, we get:

Mechanical advantage = 450 N / 50 N = 9

So the mechanical advantage is actually 9, not 100.

Therefore, the correct option is A, D and E.

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Explanation:

Using Equations of Motion :

(1) v = u + at

24 = 6.5 + a * 210

a (Acceleration) = 0.083 m/s^2

(2) v^2 = u^2 + 2aS

S = 576 - 42.25 / 0.166

S (Distance travelled) = 3215.3 m

(Option A seems a typo since the answer is 3215.3 m)

Average number of team members who reached their goal per day = 4.2

Number of team members that reached their goals on Monday = 5

Number of team members that reached their goals on Tuesday = 4

Number of team members that reached their goals on Wednesday = 2

Number of team members that reached their goals on Thursday = 7

Number of team members that reached their goals on Friday = 3

Total number of team members that reached their goals = 5 + 4 + 2 + 7 + 3

Total number of team members that reached their goals = 21

Average number of team members who reached their goal per day = 21/5

Average number of team members who reached their goal per day = 4.2

In the event of an accident or a car crash, road safety barriers and fences prevent automobiles from running off the road.

Newton's Three Laws of Physics can help explain what these safety barriers are and how they help to save lives during car accidents :

I.  Unless acted upon by an imbalanced force, an object at rest will remain at rest, and an object at constant velocity will remain at constant velocity.

II.  If an imbalanced force occurs, a mass will experience acceleration proportional to its magnitude.

III.  When you apply a force to an object, you will feel a force that is equal    in magnitude but opposite in direction.

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Answer:

It's actually C. food webs

Explanation:

took the test

Answer: c

Explanation:

edge 2020