Eugene works at a carpet factory. Which natural polymer does he most likely work with to make the carpets?

wool
rubber
nylon
silk

Answer:

A force pump can be used to raise water by a height of more than 10m, the maximum height allowed by atmospheric pressure using a common lift pump.

In a force pump, the upstroke of the piston draws water, through an inlet valve, into the cylinder. On the downstroke, the water is discharged, through an outlet valve, into the outlet pipe.

Answer:

they are machined with shape characteristics which maximize the fatigue life of a metal.

Explanation:

they are highly polished to provide the surface characteristics which enable the best fatigue life.

Answer:

The level of seed in each feeder

Explanation:

The independent variable is the variable which is the suspected cause of an observation, it is the variable that produce the effect observed in the dependent variable. The dependent variable is the variable that is measured

The independent variable is normally the x-value while the dependent variable is the y-value

In the question, Lana wants to find out the kind of birdseed that the neighborhood birds like (to eat) the most by feeding them different types of birdseed and measuring the level of the birdseed in the feeders at regular intervals

the independent variable is the bird seed types which Lana gives to the birds, to determine the type of bird seeds the birds like

The dependent variable is the level of the seed in the feeder which depends on the type of seeds the birds like.

The chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level of measurement.

In statistics, the level of measurement refers to the nature and properties of the data being collected. There are four levels of measurement: nominal, ordinal, interval, and ratio. Nominal and ordinal levels are considered categorical, while interval and ratio levels are considered numerical. The chi-square test is specifically designed for analyzing categorical data, where the observations can be classified into distinct categories or groups. It is used to determine whether there is a significant association or relationship between two categorical variables.

The test calculates the difference between the observed frequencies and the expected frequencies under the assumption of independence between the variables. It compares the observed and expected frequencies using a chi-square statistic and determines the p-value to assess the statistical significance of the association. Therefore, the chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level because it deals with categorical data and evaluates the relationship between different categories or groups.

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Answer:

i. Subtract v₀² from both of the equation.

ii. Divide both side of the equation by 2

iii. Divide both side of the equation by (x – x₀)

a = (v² – v₀²) / 2(x – x₀)

Explanation:

v² = v₀² + 2a(x – x₀)

To solve for a in the expression above, do the following:

i. Subtract v₀² from both of the equation.

v² – v₀² = v₀² – v₀² + 2a(x – x₀)

v² – v₀² = 2a(x – x₀)

ii. Divide both side of the equation by 2

(v² – v₀²) /2= 2a(x – x₀)/2

(v² – v₀²) /2 = a(x – x₀)

iii. Divide both side of the equation by (x – x₀)

(v² – v₀²) /2 ÷ (x – x₀) = a(x – x₀)/(x – x₀)

(v² – v₀²) /2 × 1/ (x – x₀) = a

a = (v² – v₀²) / 2(x – x₀)

Answer:

it's b I guess not sure

Explanation:

The reading of the balance for a body with mass 3kg and volume 4 × 10⁻⁴ in air and when fully immersed in water are 29.4N and 25.5N, respectively.

The weight of an object is the force which is acting on the object due to the influence of gravity. Weight is a vector quantity because it has both the magnitude and direction. The gravitational force acts on the object.

The reading of the balance when the body is in air, W = mg = (3) × (9.8) = 29.4 N

The reading of the balance when the body is fully immersed in water is:

F = mg − ρgV = (3) × (9.8) − (1000) × (9.8) × (0.0004) = 25.5 N

Therefore, the reading of the balance in the given conditions are 29.4N and 25.5N.

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Hi there!

To solve, we can use a summation of torques.

For the see-saw to balance, the sum of torques must equal 0, so:

∑τ = 0

Recall that:

τ = rFsinθ

r = distance from pivot (meters)

F = force (N)

In this case, the forces are the weight of the children. Also, we can leave the distance in centimeters for this type of problem, but others do require a conversion to meters.

Multiply each mass by 10 (g ≈ 10 m/s²) to get the weight:

Στ = 270(400) - x(300) = 0

270(400) = 300x

Solve for 'x', the distance in cm away from the fulcrum:

108000/300 = 360 cm

The sparks that could jump from an electrical circuit depend on the direction of the current. If the current is directed from left to right, then the sparks would first be seen on the left side.

This is because the electrons in the current flow from the negative terminal of the power source to the positive terminal. As the electrons flow along the circuit, they create a spark at the point where the electrons encounter a break in the circuit.

The sparks would continue to jump from the left side as long as the current is flowing in that direction. On the other hand, if the current is flowing right to left, then the sparks would first be seen on the right side. This is because the electrons are flowing from the positive terminal of the power source to the negative terminal. The sparks would then continue to jump from the right side until the current is turned off.

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When A computer is on a desk The normal force pushing up on the computer is 17 N and the weight is 17 N down then the Net force is 0 N

Motion of the object is because of  Force exerted on it. Balanced forces are those forces which are opposite in direction and equal in magnitude. When resultant force acting on a body is zero then it is called as balanced force. motion of the body is not because of Balanced force. ex. when two persons pulling rope on both end with equal magnitude which cause them to be balanced force have 0 net force.

When resultant of all the forces is not equal to zero then we call it as Unbalanced forces. unbalanced force are responsible for the motion of the body.

Given,

Normal Force in upward direction = 17N

weight mg in downward direction = 17N

in this case both forces are in opposite direction. one is on positive y direction and other one is in negative y direction. Therefore net force acting on the computer desk is given by,

\(F^{2} _{net} = F^{2} _{1} + F^{2} _{2} + 2F _{1}F _{2}cos\alpha\).....1

where \(\alpha\) = angle between two forces.

\(\alpha\) = 180 \(cos\alpha\) = -1

\(F_{1} = F_{2}\) , 17N =17N

With this equation 1 becomes

\(F^{2} _{net}\) = 2F₁²-2F₁² = 0N

Hence net force is 0 N. This is a balanced force.

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Answer:

I think it might be 8kg grams because it is bigger

The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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The switch that adjusts the magnetic field to be either nearly uniform or have a strong gradient will affect the current in the two coils differently.

When the magnetic field is nearly uniform at the center, the current in both coils will remain relatively unchanged. The uniform field will not induce any significant voltage in the coils, so the current will flow through them as usual.

However, when the magnetic field has a strong gradient, the current in the two coils will be affected differently. The rapidly changing field will induce a voltage in the coils according to Faraday's law of electromagnetic induction. This induced voltage will result in a change in the current flowing through the coils. The magnitude and direction of the induced current will depend on the specific characteristics of the coils and the magnetic field gradient.

In summary, the switch that changes the magnetic field from uniform to having a strong gradient will induce a change in the current flowing through the coils due to the induced voltage.

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Answer: False

Explanation:

The efficiency of a certain engine can be determined using the Carnot Cycle equation. The efficiency of an engine is proportional to the difference in temperature between the hot reservoir and the cold reservoir.

The efficiency can be calculated using the following formula:

η = (Th - Tc) / ThWhere,η = efficiency of the engine

Th = temperature of the hot reservoir

Tc = temperature of the cold reservoir

Given that the temperature of the hot reservoir is 700°C and the temperature of the cold reservoir is 230°C.

Therefore,η = (700 - 230) / 700η = 0.67The efficiency of the engine is 0.67 or 67%. In other words, only 67% of the heat energy is converted into mechanical energy while the remaining 33% is lost as waste heat.

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The net force on particle q2 can be calculated by finding the net electric force acting on it. The net electric force acting on a particle is the vector sum of the forces exerted by all the other charges on it.

The electric force between two charges q1 and q2 is given by Coulomb's law: F = k * (q1 * q2)/r^2, where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

The force on particle q2 due to q1 will be:

F1 = k * (q1 * q2) / (0.980m)^2

The force on particle q2 due to q3 will be:

F2 = k * (q2 * q3) / (0.750m)^2

The net force acting on q2 will be the vector sum of F1 and F2.

Keep in mind, q1 and q3 have opposite charges, so they attract each other, while q2 has the same charge as q1, so they repel each other.

Note: The unit of charge is Coulomb (C), but in this problem you are given the charges in microCoulomb (uC) so you need to convert it to Coulomb.

Answer:

m = 1,975 m / kg , b = 38.05 m

Explanation:

In this experiment, the elongation is plotted against the applied mass

getting a straight line

            y = m x + b

where b would be the initial length of spring let's calculate the slope for which we use two well separated points

           m = (56.3 -48.4) / (8 - 4)

           m = 1,975 m / kg

the equation remains

         y = 1,975 x + b

for x = 2 kg y = 42.0 m

we substitute in the equation

           42 = 1,975 2 + b

           b = 42 - 3.95

           b = 38.05 m

Answer:

very true

Explanation:

u ok?

(their* not there)

But- WHOAH- You don't need to say "Goodbye forever" you could find new friends who love and support you. People say things, they do things, but they're still human, just like you are. Mistakes will be made. You just gotta fight the bad and look for a brighter future. Not everyone or everything is gonna be sunshine and rainbows. It's gonna be bumpy and rough, you just gotta work out the kinks of it and move on.

Answer:

4 smaller disks

Explanation:

We are given;

Mass of smaller and larger disks = M

Radius of smaller disk = R

Radius of larger disk = 4R

Formula for moment of inertia about cylinder axis is:

I = ½MR²

Thus;

For small disk, I_small = ½MR²

For large disk, I_large = ½M(2R)² = 2MR²

We are told that moment of inertia of System A consists of two of the larger disks. Thus;

I_A = 2 × I_large = 2 × 2MR²

I_A = 4MR²

We are also told that System B consists of one of the larger disks and a number of the smaller disks. Thus;

I_B = I_large + n(I_small)

Where n is the number of smaller disks.

I_B = 2MR² + n(½MR²)

I_B = MR²(2 + n/2)

We are told that the moment of inertia for system A equals the moment of inertia for system B. Thus;

I_A = I_B

So;

4MR² = MR²(2 + n/2)

MR² will cancel out to give;

4 = 2 + n/2

Multiply through by 2 to give;

8 = 4 + n

n = 8 - 4

n = 4

Answer:

A bear normally has a short, thick neck, a rounded head, a pointed muzzle, short ears, and small eyes. Some species have round faces. Bears have poor eyesight, and most have only fair hearing.

Explanation:

Modern Bears are characterized with large body and stocky legs, a long snout, shaggy hair, plantigrade paws with five non-retractile claws and a short tail.

Grizzly bears (Ursus arctos horribilis) have concave faces, a distinctive hump on their shoulders, and long claws about two to four inches long. Both the hump and the claws are traits associated with a grizzly bear's exceptional digging ability. Grizzlies are often dark brown, but can vary from blonde to nearly black.

The brown bear has a slight hump above its shoulder, round ears, a long snout and big paws with long, curved claws that it uses for digging. Unlike the black bear, it can't climb trees. It can weigh between 350-1,500 pounds. When standing on its hind legs it can be up to 5 feet tall.

Hope this helps     :)

(I didn't know which type of bear so i did brown bear and grizzly bear)

The power delivered is 25 Watts (W) because Power = Work/Time = 50 J/2 seconds = 25 W.

Power is the rate at which work is done or energy is transferred. It is expressed as the amount of work done (in joules) divided by the time it takes to do the work (in seconds). Power is measured in units such as watts (W) or joules per second (J/s).

Power is an important concept in physics, engineering, and other sciences, as it allows us to understand the rate at which energy is used or transferred.

Calculation of power

Power = Work/Time

Power = 50 J/2 seconds

Power = 25 W

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Answer:

The mechanical advantage (M.A) of a real machine is always less than its velocity ratio(V.R) because mechanical advantage decreases due to the friction and weight of moving parts of the machine whereas the velocity ratio remains constant.

Answer: F = 102141N

Explanation: Newton's 2nd Law states that a force can change the motion of a body. The relation is given by

F = m.a

whose units are:

[F] = N

[m] = kg

[a] = m/s²

Jenny's car, at the moment of the break, had acceleration:

\(a=\frac{\Delta v}{\Delta t}\)

\(a=\frac{11}{0.14}\)

a = 78.57 m/s²

Then, Force is

F = 1300*78.57

F = 102141 N

Jenny's car experienced a force of magnitude 102141N.

Answer:

Explanation:

given : A bus traveling at 60 m/s brakes and accelerates to a stop at a rate of -5m/s.

so, v=0

u=60

a= -5

we know,

v²- u² = 2as

or, (0)² - (60)² = 2×(-5)×s

or, -3600 = -10 s

or, s = 360

The bus travelled 360m and then stopped.

The fundamental period (To) of a signal is the smallest T for which it repeats. Frequency (Wo) is the reciprocal of To. Example: To = 0.5s, Wo = 2Hz.

The fundamental period (To) of a periodic signal is the smallest positive value of T for which the signal repeats itself exactly. The frequency (Wo) of a periodic signal is the reciprocal of the fundamental period,

Wo = 1/To.

To find the fundamental period and frequency of a signal, we need to analyze its waveform.

First, let's identify the period of the signal. The period is the horizontal distance between two adjacent peaks (or troughs) of the waveform. If the signal repeats itself exactly, it is periodic.

Once we have identified the period, we can calculate the fundamental period (To) by measuring the distance between two adjacent peaks (or troughs) and taking the smallest positive value.

To calculate the frequency (Wo), we can use the formula Wo = 1/To. Here's an example to illustrate this process:

Let's say the signal waveform repeats itself every 2 seconds. This means the period is 2 seconds.

To calculate the fundamental period (To), we measure the distance between two adjacent peaks (or troughs) and find it to be 0.5 seconds.

Therefore, the fundamental period (To) is 0.5 seconds.

To calculate the frequency (Wo), we use the formula Wo = 1/To. In this case, Wo = 1/0.5 = 2 Hz. So, the fundamental period (To) of the signal is 0.5 seconds and the frequency (Wo) is 2 Hz.

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Your friend must be wrong because the time-dependence of acceleration is given by the derivative of velocity with respect to time, not the time itself. The equation a(t) = yt² + yt does not represent the correct relationship between acceleration and time.

Acceleration is defined as the rate of change of velocity with respect to time. In mathematical terms, it is the derivative of velocity with respect to time, denoted as a(t) = dV/dt. Therefore, the equation a(t) = yt² + yt provided by your friend does not represent the correct relationship between acceleration and time.

To determine the correct relationship, we need to integrate the equation for acceleration to obtain the velocity function. Given that a(t) = yt² + yt, integrating both sides with respect to time gives V(t) = (1/3)yt³ + (1/2)yt² + C, where C is the constant of integration. However, this equation represents the velocity as a function of time, not the acceleration.

Your friend's equation a(t) = yt² + yt for the time-dependence of acceleration is incorrect. Acceleration is the derivative of velocity with respect to time, not a function of time itself. The correct relationship can be obtained by integrating the acceleration equation, yielding the velocity as a function of time.

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Answer:

The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting point.

∙ The tin and lead alloy is a eutectic composition (low melting point composition) consisting of 62% tin plus 38% lead.

∙ Melting point of this alloy is 183 ^C

Explanation:

Work can be calculated with the equation given as Work = Force × Distance

When a force acts on an object to cause a displacement, it was said that work was taking place. Three variables must be known in order to calculate the work when a force causes an object to be displaced.

Work = Force × Distance is the formula for calculating work. The joule (J), also known as the Newton meter (N m), is the SI unit for work. When an object is moved over a distance of 1 m with 1 N of force, one joule is equal to the amount of work that is accomplished.

To determine the amount of work, three quantities must be known. The force, the displacement, and the angle between the force and the displacement are the three variables.

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The change in momentum of the ball is 0.90 kg·m/s, calculated as the product of the mass of the ball and the difference in velocity before and after impact.

The change in momentum of an object is equal to the product of its mass and the difference in its velocity before and after an event, such as a collision or impact. In this case, the mass of the ball is 200 grams or 0.2 kg, and it is dropped from a height of 50 cm and rebounds to a height of 35 cm after impact. The initial velocity of the ball can be calculated using the equation for gravitational potential energy, mgh, where m is the mass, g is the acceleration due to gravity, and h is the height. The initial velocity is found to be 3.13 m/s. The final velocity is calculated using the same equation, and the difference in velocities is found to be 6.26 m/s. Therefore, the change in momentum of the ball is 0.90 kg·m/s, which is equal to the product of the mass of the ball and the difference in velocity before and after impact.

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By altering the total mass of the carts in a collision simulation, the momentum of the carts is affected, which in turn changes the velocity of the combined carts after the collision. Therefore, the final velocity becomes the variable that depends on the change in the independent variable, which is the total mass of the carts.

In a collision between two carts, the total momentum before the collision is equal to the total momentum after the collision, according to the law of conservation of momentum. The momentum of an object is given by the product of its mass and velocity.

By altering the mass of the carts, we can change the total momentum before the collision. This change in momentum directly affects the velocity of the combined carts after the collision. If the total mass of the carts is increased, the momentum will also increase, resulting in a lower final velocity. Conversely, if the total mass is decreased, the momentum will decrease, leading to a higher final velocity.

Therefore, the final velocity of the combined carts becomes the variable that changes based on the alteration of the independent variable, which is the total mass of the carts in the collision simulation.

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