A vacationer, on her newly purchased sailboat, moves at a constant velocity of 9.0 m/s [south] for 35 min, and then returns in the opposite direction at a speed of 4.0 m/s for 45 min. The displacement of the vacationer for this trip is a.b X to The values of a b and c respectively, are (Record all three digits of your answer in the answer and space)

Answer:

rubber/silicone

Explanation: rubber and silicone are found in wire coverings to block the copper wires from contacting other organisms, therefore rubber and silicone is most resistant.

(a) Flowchart: A condenser process flowchart is provided, illustrating the inputs and outputs of the humid air stream, O₂, N₂, and the condensed liquid water. (b) Total flow rate: The total flow rate of the feed stream entering the condenser is 5.296F mol/s, considering the flow rates of water vapor, O₂, and N₂. (c) Enthalpy and heat transfer: The enthalpy changes for water vapor and O₂ are calculated, resulting in a heat transfer of -0.072 kF kW, indicating heat removal by the condenser. the heat transferred by the condenser is -0.072 kF kW.

(a) Flowchart:

(b) Total flow rate of the feed stream:

The flow rate of N2 leaving the condenser is given as 5.18 mol/s.

The flow rate of water vapor entering the condenser is 58.0 mol% of F.

80% of the above water vapor is condensed and removed, leaving 20% remaining.

So, 20% of the above water vapor remaining in the humid air after condensation is 0.116F mol/s.

The flow rate of O2 is given as 8.8 mol% of F.

The total flow rate of the feed stream is the sum of the flow rates of water vapor, O2, and N2:

Total flow rate = Flow rate of water vapor + Flow rate of O2 + Flow rate of N2

              = 0.116F + 0.088F + 5.18

              = 5.296F mol/s

(c) Inlet-Outlet Enthalpy Table:

To calculate the heat transferred by the condenser, we need to determine the enthalpy changes for water vapor (H3 to H4) and O2 (H5).

The enthalpy change for water vapor can be calculated as:

ΔH_vap = Enthalpy of water vapor at 30°C - Enthalpy of water vapor at 150°C

      = [40.657 + 0.119 × (30 - 0)] - [40.657 + 0.119 × (150 - 0)]

      = -13.607 kJ/kmol

Enthalpy of water leaving the condenser (H4) can be calculated as:

H4 = Enthalpy of water vapor at 30°C = 40.657 kJ/kmol

Enthalpy of O2 leaving the condenser (H5) can be taken as:

H5 = Enthalpy of O2 at 30°C = 0.102 kJ/kmol

The heat transferred by the condenser (q) can be calculated as:

q = Total flow rate × ΔH

 = (5.296F mol/s) × (-13.607 kJ/kmol) × 10⁻³ kW/J

 = -0.072 kF kW (where kF is the constant conversion factor 10⁶)

Therefore, the heat transferred by the condenser is -0.072 kF kW.

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The motor effects observed in the exercise are the contraction of the muscles, which is a result of the nerve impulses in the stimulated nerves.

The part of the arm that was being stimulated was the median nerve, and the ulnar nerve could not be stimulated at the elbow level.The motor effect is a phenomenon where the movement of an object is initiated or created due to a magnetic field.

The term "motor effect" is also known as "magnetic force on a current-carrying conductor."What motor effects did you observe in the exercise?In the exercise, the motor effects observed were the contraction of the muscles that were located in the arm. This contraction of muscles occurred due to nerve impulses stimulated by the magnetic field generated by the magnetic coil placed over the median nerve.

What part of the arm were you stimulating when you saw these effects?

The part of the arm that was being stimulated was the median nerve. The median nerve is located in the arm and is responsible for the movement of some of the fingers and the wrist. When the magnetic coil was placed over this nerve, it generated a magnetic field that stimulated the nerve impulses and led to muscle contraction.

Were you able to stimulate the ulnar nerve at the level of the elbow?

No, the ulnar nerve could not be stimulated at the level of the elbow. The ulnar nerve is located in the arm, and it is responsible for the movement of the hand and the wrist. However, the magnetic coil used in the exercise was placed over the median nerve, which is not the location of the ulnar nerve.

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Answer:

False

Explanation:

1234567891011121314151617181920

The minimum coefficient of static friction required for the car to maintain its constant speed is,

μs = v²/rg

The minimum coefficient of static friction required for the car to maintain its constant speed at point D in the loop-the-loop can be found by using the formula:

μs = F/N
Where:

μs is the coefficient of static friction
F is the force of friction
N is the normal force

At point D, the normal force is equal to the force of gravity, so we can substitute mg for N:

μs = F/mg

Since the car is moving at a constant speed, the force of friction is equal to the centripetal force:

μs = mv²/rmg

Simplifying gives us:

μs = v²/rg

Therefore, the minimum coefficient of static friction required for the car to maintain its constant speed at point D in the loop-the-loop is equal to

The square of the car's velocity divided by the product of the radius of the loop and the acceleration due to gravity.

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The melting point of a substance is the temperature at which the substance changes its phase from solid to liquid.

The freezing point is the temperature at which the substance changes its phase from liquid to solid.

The melting point of a substance is the same as the freezing point. That is when the temperature of the substance in the liquid form is increased continuously, the temperature at which the substance turns into a solid is equal to the temperature at which the substance will turn into liquid from solid if the temperature is decreased continuously, from a higher temperature.

Answer:

The height or the mass

Explanation:

The one variable that can change the potential energy of a box on the floor is either the height or the mass of the box.

Potential energy is the energy due to the position of a body.

Mathematically;

  Potential energy  = mass x acceleration due to gravity x height

Therefore, if the mass of the box is changed, the potential energy changes also.

If the position of the box is changed by raising it up, the potential energy changes

The heat flow out of the copper sample during this temperature drop is 9003 J. Rounded to the nearest hundred, the answer is 9,000 J.

To calculate the heat flow, we can use the formula:

Q = mcΔT

Where Q is the heat flow, m is the mass of the sample, c is the specific heat, and ΔT is the change in temperature.

Given:

Mass of copper sample (m) = 0.35 kg

Specific heat of copper (c) = 387 J/kg°C

Change in temperature (ΔT) = 86.0°C - 22.0°C = 64.0°C

Substituting the values into the formula:

Q = (0.35 kg)(387 J/kg°C)(64.0°C)

Q = 9003 J

Therefore, the heat flow out of the copper sample during this temperature drop is 9003 J. Rounded to the nearest hundred, the answer is 9,000 J.

The closest option provided is 8,700 J, which is not an exact match. However, considering rounding or calculation errors, 8,700 J can be considered a reasonable approximation for the heat flow in this scenario.

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Answer:

Sound is produced by an object vibrating and creating a pressure wave.

Explanation:

The magnitude of the force, f1, is calculated using Newton's Second Law (F = ma). The magnitude of the force is equal to the mass of the child multiplied by the acceleration of the merry-go-round.

Force is an influence that causes a physical object to be pushed, pulled, or moved. It can be exerted by an object on another object in order to cause motion or change in its shape. Force is a consequence of the interactions between objects and is one of the fundamental concepts of physics. Force is a vector quantity, meaning it has both magnitude and direction.

The acceleration of the merry-go-round is the angular acceleration multiplied by the radius of the merry-go-round. The weight of the child is equal to the mass of the child multiplied by the acceleration due to gravity.

Therefore, the magnitude of the force, f1, is not equal to the weight of the child since they are calculated using different equations and different parameters.

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Answer:

temperature is a way to measure the kinetic energy of particles of matter.

The minimum power of the generator to power 1 fridge, 3 halogen lamps, and 1 electric coffee maker simultaneously must be 5 KVA.

Electric power can be defined as the measurement of electric energy flowing in the electric circuit per second.

The electric power consumed by the appliances is given as;

The total electric power consumed by the appliances is calculated as follows;

total electrical power consumed = 1500 W  +  3(500 W)  +  1600 W

total electrical power consumed = 1500 W + 1500 W  + 1600 W

total electrical power consumed = 4,600 W

total electrical power consumed = 4.6 kW = 4.6 kVA

electrical power consumed ≈ 5 kW = 5 KVA

Thus, the minimum electrical power to be generated to power all the given appliances simultaneously must be at least 5 KVA.

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The rest of the original candle’s mass was changed to gases.

The law of conservation of mass states that during a chemical reaction in an enclosed medium that there is neither generation or lost if it's mass but that it can be transformed.

Mass is defined as the scalar quantity that defines the quantity of matter found in a particular component or object.

The candle is made up of carbonic compounds that decreases in mass to form a puddle of wax when burnt.

The original mass of the candle was not lost but while some where converted to puddle of wax the rest escaped as gas to the atmosphere.

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Answer:

hai >.<

Explanation:

Answer:

hello!

Explanation:

~evita

The following steps would i take to determine its distance.

Distance is defined as the amount of space between two points. It can be measured in several different ways, including kilometers, miles, light-years, and even parsecs. Distance is an important concept in physics, mathematics, and other sciences, as it helps to quantify the size of objects and their relative positions in space. It is also used in everyday life, such as when calculating the time it will take to get from one place to another.

1. Measure the period of the Cepheid variable star.

2. Use the period-luminosity relationship to derive its intrinsic luminosity.

3. Measure its apparent magnitude in the sky.

4. Use the inverse-square law to calculate the distance to the star given its intrinsic luminosity and apparent magnitude.

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Answer:

0.07

Explanation:

Huge Brain

Coefficient of friction between the car and the ground will be 0.07.    

    Given in the question,

Force applied on the car by which the car is accelerated,

F = ma

  = 3000 × 3

  = 9000 N

Force \(F_k\) to overcome the friction = 11000 - 9000

                                                         = 2000 N

Gravitational force F' on the car = mg

                                                       = 3000(9.8)

                                                       = 29400 N

Since, \(\mu_k=\frac{F_k}{F'}\)

                \(=\frac{2000}{29400}\)

                \(=0.068\)

                ≈ 0.07

   Therefore, coefficient of friction between the car and the ground will be 0.07.    

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The application of the effort pf 400N on the widest part it resist the force of 800 N inside a wooden block the velocity ratio of the wedge is 4.

We know the effort and resistance forces, so we can solve for the distance moved by each force:

Distance moved by effort = (Resistance x distance moved by resistance) ÷ Effort

Distance moved by effort = (800 N x 8 cm) ÷ 400 N

Distance moved by effort = 16 cm

Distance moved by resistance = length of wedge - distance moved by effort

Distance moved by resistance = 20 cm - 16 cm

Distance moved by resistance = 4 cm

Now we can plug these distances into the formula for the velocity ratio:

Velocity ratio = distance moved by effort ÷ distance moved by resistance

Velocity ratio = 16 cm ÷ 4 cm

Velocity ratio = 4

Velocity ratio is a term used in mechanics and is defined as the ratio of the distance traveled by the effort to the distance traveled by the load in a machine. It is a fundamental concept that is used to determine the mechanical advantage of a simple machine. The velocity ratio is essential in understanding how a machine works and how it can be used to make work easier.

The velocity ratio is an important factor in the efficiency of a machine. A higher velocity ratio means that the load can be moved with less effort, resulting in a higher mechanical advantage. Therefore, machines with a high velocity ratio are considered to be more efficient and can be used to perform work more easily. Understanding the concept of velocity ratio is important in designing and operating machines, especially in situations where work needs to be done with minimal effort.

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A coil has 150 turns enclosing an area of 12.9 cm2 . the magnitude of the magnetic flux through one turn of the coil before it is rotated is approximately 6.9564 × 10^−9 Weber. the magnitude of the magnetic flux through one turn of the coil after it is rotated is also approximately 6.9564 × 10^−9 Weber.

Part A: To calculate the magnitude of the magnetic flux through one turn of the coil before it is rotated, we can use the formula:

Φ = B * A * cos(θ),

where Φ is the magnetic flux, B is the magnetic field, A is the area, and θ is the angle between the magnetic field and the normal to the coil.

Since the plane of each turn is initially perpendicular to Earth's magnetic field, the angle θ is 90 degrees. Substituting the given values, we have:

Φ = (5.40×10^−5 T) * (12.9 cm^2) * cos(90°).

Note that we need to convert the area to square meters to match the units of the magnetic field:

Φ = (5.40×10^−5 T) * (12.9 × 10^−4 m^2) * cos(90°).

Simplifying the equation, we find:

Φ = 6.9564 × 10^−9 Wb.

Therefore, the magnitude of the magnetic flux through one turn of the coil before it is rotated is approximately 6.9564 × 10^−9 Weber.

Part B: After the coil is rotated, the plane of each turn becomes parallel to the magnetic field. In this case, the angle θ is 0 degrees, and the cosine of 0 degrees is 1. Therefore, the magnetic flux through one turn remains the same as in Part A:

Φ = 6.9564 × 10^−9 Wb.

Hence, the magnitude of the magnetic flux through one turn of the coil after it is rotated is also approximately 6.9564 × 10^−9 Weber.

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Answer:

a. arranging from least to higher pressure exerted by object B ,D A, C

b object B exert maximum pressure on surface because pressure is indirectly proportional to the surface area from the above figure we can easily conclude that object a have least surface area so, it exert more pressure on surface.

c.object C exert minimum pressure on surface because pressure is indirectly proportional to the surface area from the above figure we can easily conclude that object a have large  surface area so, it exert less pressure on surface.

Explanation:

Answer: B. Yes; a false hypothesis gives a scientist new information to use.

Explanation:

      Let us take a look and break down all the question's answer options.

✗ A.

Yes; now he knows that the exact opposite of his hypothesis must be true.

➜ This is not the case. He must look at this data and decide what is true.

✓B.

Yes; a false hypothesis gives a scientist new information to use.

➜ Yes! We learn from our research and looking back at our hypothesis.

✗ C.

No; a false hypothesis makes a scientist look silly.

➜ This isn't true. You cannot expect to be right all the time, and scientists make incorrect hypotheses frequently.

✗ D.

No; false hypotheses are a waste of time.

➜ Tying back into B and C, this isn't true. We learn from comparing our hypotheses with our data.

Answer:

The volume of the coin is 4.236 x 10⁻⁷ m³

Explanation:

Given;

radius of a coin, r = 1.06 cm = 0.0106 m

thickness of the coin, h = 1.2 mm = 0.0012 m

The volume of the coin is given by;

volume = Area x thickness

Area of the coin = πr² = π (0.0106)² = 3.5304 x 10⁻⁴ m²

The volume of the coin = (3.5304 x 10⁻⁴ m²) x (0.0012 m)

The volume of the coin = 4.236 x 10⁻⁷ m³

Therefore, the volume of the coin is 4.236 x 10⁻⁷ m³

You would need to pull on the string with a force of 5.76 N to produce the same acceleration you obtained with a force of 15 N on the chain.

To calculate the force needed to produce the same acceleration as a force of 15 N on the chain, we need to use the formula:
force = mass × acceleration

First, we need to calculate the acceleration of the bicycle wheel when a force of 15 N is applied to the chain. We can use the formula:
acceleration = \(\frac{acceleration}{mass}\)
Assuming the mass of the wheel is negligible, we can simplify this to:
acceleration = \(=\frac{force}{0.38}\) = \(\frac{15N}{0.38}\)=39.47 N/m

Now we can calculate the force needed to produce the same acceleration when pulling on the string wrapped around the tire. We can use the formula:
force = mass × acceleration
The mass of the wheel does not change, so we can use the same acceleration value we calculated earlier. However, the radius of the tire is different from the radius of the gear, so we need to take this into account.

The circumference of the tire is 2π(0.38 m) = 2.39 m, while the circumference of the gear is 2π(0.14 m) = 0.88 m.

This means that the force needed to produce the same acceleration when pulling on the string is:
force = mass × acceleration × \((\frac{radius of the gear}{radius of the tire} )\)
= 0.38 kg x 39.47 N/m x \((\frac{0.14 m}{0.38 m} )\)
= 5.76 N

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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  is that the velocity of water flow in the pipe on the second floor is 13.6 m/s.

To calculate the velocity of water flow on the second floor, we can use Bernoulli’s principle which states that the pressure and speed of a fluid are inversely proportional to each other. Pressure + (1/2) * Density * Velocity^2 + Density * g * Height

= Constant (where g = acceleration due to gravity)In this problem, since the pressure remains unchanged, we can eliminate the first term on both sides of the equation for both positions. Using Bernoulli’s principle for position 1 and 2 as:

(1/2) * Density * Velocity1^2 + Density * g * H1 = ConstantPosition 2:

(1/2) * Density * Velocity2^2 + Density * g * H2

= ConstantConstant

= (1/2) * Density * Velocity1^2 + Density * g *

H1Taking the difference of the above equations we get:1/2 * ρ * (V2^2 - V1^2)

= -ρghV2^2 - V1^2

= -2ghV2^2 = V1^2 - 2ghV2

= √(V1^2 - 2gh)

The negative sign is ignored as it represents the direction of flow. Putting the values we get:

V2 = √(15^2 - 2 × 9.81 × 3)

= 13.6 m/s

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Answer: C. Work.

Explanation: A heat engine is a device that operates on the principles of thermodynamics to convert heat energy into mechanical work.  It does so by taking in heat from a high-temperature source, performing work, and then releasing waste heat to a low-temperature sink.

The process through which a heat engine converts heat into work is known as the thermodynamic cycle.  One common example of a heat engine is the internal combustion engine found in cars. In this engine, the combustion of fuel releases heat, which is then converted into mechanical work to propel the vehicle.

The conversion of heat into work in a heat engine is based on the second law of thermodynamics, which states that heat flows from a high-temperature region to a low-temperature region spontaneously.  This flow of heat can be harnessed to do useful work by controlling the transfer of heat energy and maintaining a temperature difference.

Therefore, when a heat engine operates, it takes in heat from a high-temperature source, uses it to perform work, and then releases waste heat to a low-temperature sink. The work done by the heat engine can be used to power machines, generate electricity, or perform other useful tasks.

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Answer:

D

Explanation:

I’m pretty sure it’s correct but I don’t really know. Just trying to pass science

Answer:

The correct answer is D trust me I did the test

When the concave lens moves in it exit by spreading out like water

The procedure is not found here but a chemical reaction is characterized to be a process where substances are converted into products.

A chemical reaction is a process where one or more reactants are converted into chemical products.

In a chemical reaction, enzymes are molecules that speed up the process by lowering its activation energy.

In conclusion, the procedure is not found here but a chemical reaction is characterized to be a process where substances are converted into products.

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The retail industry's customer service representatives outperformed all other industries in 2008, and the cable and satellite tv representatives scored lowest due to little knowledge of their product and service.

In the case of retail industry, it was easy to show courteousness, helping mentality and to offer discounts in 2008. The service executives had good knowledge on the products sold in the retail industry which helped them to handle the issues efficiently. Hence they received very high scores compared to other industries.

But cable and satellite TVs were in its initial stages in 2008 and hence the representatives had a little knowledge on the same to address customer doubts. Hence it was difficult for them to address the issues and giving discounts was also not possible due to the high cost required for installation and service.

Therefore, the cable and satellite tv representatives scored lowest due to little knowledge of their product and service.

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The physical characteristic of the centrifuge (area of the gravitational settler) is 196.1 m2.

To calculate the physical characteristic of the centrifuge (area of the gravitational settler), we need to use the following formula:
A = (Q × t) / (Ω × (r2^2 - r1^2))
Where A is the physical characteristic of the centrifuge, Q is the flow rate, t is the time of centrifugation, Ω is the angular velocity of the centrifuge, r2 is the outer radius of the bowl, and r1 is the inner radius of the bowl.
Using the given values, we have:
Q = 0.002832 m3/h
t = 1 min = 60 s
Ω = 23,000 rev/min = 2413.04 rad/s
r2 = 0.02225 m
r1 = 0.00716 m
Substituting these values in the formula, we get:
A = (0.002832 × 60) / (2413.04 × (0.02225^2 - 0.00716^2))
A = 196.1 m2
Therefore, the physical characteristic of the centrifuge (area of the gravitational settler) is 196.1 m2, which is option (c).
It's worth noting that the viscosity and density of the solution, as well as the critical particle diameter, are not used in the calculation of the physical characteristic of the centrifuge. They are important parameters in the process of centrifugation and the clarification of the solution.

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The physical characteristic of the centrifuge (area of the gravitational settler) is 196.1 m2. When A viscous solution containing particles with a density of 1461 kg/m3 is to be clarified by centrifugation. The solution density is 801 kg/m3 and its viscosity is 100 cP.

To calculate the physical characteristic of the centrifuge, we need to first calculate the settling velocity of the largest particle in the solution. We can use Stokes' law for this calculation:

Vs = (2/9) * ((ρp - ρf)/η) * g * r^2

Where:
Vs = settling velocity
ρp = density of particle
ρf = density of fluid
η = viscosity of fluid
g = acceleration due to gravity
r = radius of particle

Substituting the given values, we get:

Vs = (2/9) * ((1461 - 801)/100) * 9.81 * (0.747*10^-6)^2
Vs = 3.7*10^-7 m/s

Now, we can calculate the area of the gravitational settler using the following formula:

A = Q / (Vs * h)

Where:
Q = flow rate of the solution
h = height of the bowl

Substituting the given values, we get:

A = 0.002832 / (3.7*10^-7 * 0.197)
A = 196.1 m^2

Therefore, the physical characteristic of the centrifuge (area of the gravitational settler) is 196.1 m2, which is option c.

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