A wooden log has to be carried by two people. If one of them is strong and another weak, how will they carry the log? Show with a diagram and also give reason.​

a. The minimum friction coefficient for this operation is 0.136.

b. The the exit speed is 152.3 in/min.

c. The the roll force is 131,031 lbs.

d. The the power in this operation is 604.8 hp.

Width of copper strip, w = 10 inches

Thickness of copper strip before rolling, t1 = 1 inch

Thickness of copper strip after rolling, t2 = 0.75 inch

Roll radius, R = 12 inches

Roll speed, N = 100 rpm

Entry speed, V1 = 20 in/min

Yield strength, K = 46,000 psi = 315 MPa

Strain hardening exponent, n = 0.54

a. The minimum friction coefficient can be calculated using the formula:

μ_min = (1 - e^(-πμtanφ))/πtanφ

where φ is the angle of contact between the strip and the roll, given by:

tanφ = (R - t2/2)/(w/2)

Substituting the given values, we get:

tanφ = (12 - 0.75/2)/(10/2) = 1.135

φ = 50.47 degrees

Now, substituting the value of tanφ in the first equation and solving for μ_min, we get:

μ_min = 0.136

Therefore, the minimum friction coefficient for this operation is 0.136.

b. The exit speed can be calculated using the formula:

V2 = V1(NR/t1)(t1/t2)^n

Substituting the given values, we get:

V2 = 20(100*12/1)(1/0.75)^0.54 = 152.3 in/min

Therefore, the exit speed is 152.3 in/min.

c. The roll force can be calculated using the formula:

F = K(2t1t2/(t1+t2))(ln(R/r)+0.5nln((t1+t2)/2r))

where r is the mean radius of the material, given by:

r = (t1 + t2)/2

Substituting the given values, we get:

r = (1 + 0.75)/2 = 0.875 inches

ln(R/r) = ln(12/0.875) = 2.3

Now, substituting the values of r, K, t1, t2, R, and n in the first equation and solving for F, we get:

F = 131,031 lbs

Therefore, the roll force is 131,031 lbs.

d. The power can be calculated using the formula:

P = FV2/33,000

Substituting the given values, we get:

P = 131,031*152.3/33,000 = 604.8 hp

Therefore, the power in this operation is 604.8 hp.

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Answer:

v=10.75m/s

Explanation:

It is given that,

Pete drives 215 Meters in 20 seconds. He is driving down 7th floor. We need to find his speed.

Speed = distance/time

⇒

\(v=\dfrac{215\ m}{20\ s}\\\\v=10.75\ m/s\)

Hence, the speed of Pete is 10.75 m/s.

Answer:

hope it helps...

Explanation:

The answer is true

The tension in the cord connected to the ball will be greatest when the ball is moving in a circular path.

When an object moves in a circular path, it moves with a constant speed, but its velocity changes direction continuously, this results in a non-zero acceleration. This acceleration is called centripetal acceleration (a).

According to Newton's second law, the force on an object is equal to the mass of the object times its acceleration,

F = ma

When a ball is moving in a circular path, the centripetal force required to keep it moving in a circular path is provided by the tension in the cord connecting the ball to the pivot.

Therefore, the tension in the cord will be greatest when the ball is moving in a circular path.

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Answer:

Loyalty-Being loyal is important to being a good citizen because it shows that you acknowledge the effort others have put in to what you are doing and it shows that you enjoy what you are doing. Loyalty is important to a productive community because it promotes good work and effort

Explanation:

Answer: 90Kg

Explanation:

The mass of air hitting the sail each second can be calculated as:

mass of air = density of air * volume of air

The volume of air hitting the sail can be calculated as:

volume of air = area of sail * velocity of wind * time

Here, the area of sail is given as 3.8 m², the velocity of wind is 20 ms^-1, and the time is 1 second (since we want to calculate the mass of air hitting the sail each second).

Therefore,

volume of air = 3.8 m² * 20 ms^-1 * 1 s = 76 m³

Using the given density of air of 1.2 kg m^-3, we can calculate the mass of air hitting the sail each second as:

mass of air = 1.2 kg m^-3 * 76 m³ = 91.2 kg

Therefore, the mass of air hitting the sail each second is approximately 90 kg.

Sara pushed a box of lab equipment along the ground, displacing it by 1 meter. she has done work on the box of lab equipment.

When a force is applied and an object is moved over a specified distance, a work has been completed. The following formula is used to calculate an object's work,

W = Fd

Where, F is the applied force, and d is the object's displacement.

Therefore ,Sara has therefore completed her work on the box of lab equipment when she moves it by 1 m.

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Answer: Force required to 25 joule work when the force causes a displacement of 0.5m is 50N

Explanation: To calculate the work done we use the formula

W=F.s                               (1)

W= work done

F=  force applied               s= displacement

Given, work done W= 25 joules= 25 J

displacement s= 0.5m

∴From equation (1) we get the force required when work is done and displacement is given, that is

F\(=\frac{W}{s}\)                                (2)

∴Force required \(F=\frac{W}{s}= \frac{25J}{0.5m}=50N\)            

(1 J is the work done by a force of 1 N acting over a displacement of 1 m and so 1 J= 1 Nm⇒ 1 N = 1 J/m)

ANS: Force required to do 25 J work when a force causes displacement of 0.5m = 50 N

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Given :

A 1200 kg truck traveling at 20 m/s towards the east.

To Find :

The magnitude and direction of the momentum.

Solution :

We know, momentum is given by :

Momentum, P = mv

P = 1200 × 20 kg m/s

P = 24000 kg m/s

Now, we know, direction of momentum is same as the direction of velocity.

Therefore, momentum of truck is 24000 kg m/s and direction is towards the east.

Answer:

B desert

Explanation:

Cause a Desert fits all of those descriptions bestie

Answer:

vega the first one

pb

p

Explanation:

Answer:

#A

Acceleration=a

\(\\ \tt\hookrightarrow a=\dfrac{v-u}{t}=\dfrac{8}{4}=2m/s^2\)

#B

\(\\ \tt\hookrightarrow a=\dfrac{0-8}{4}=\dfrac{-8}{4}=-2m/s^2\)

Answer(s):

Solution for Practice-A:

We know that:

Solution:

Hence, the acceleration is 2 m/s for practice A.

Solution for Practice B:

We know that:

Solution:

Hence, the acceleration is -2 m/s for practice B.

Hoped this helped!

According to the Heisenberg uncertainty principle, there is a fundamental limit to the precision with which we can simultaneously measure the position and momentum of a particle. The product of the uncertainties in these two measurements is always greater than or equal to a certain constant value, known as Planck's constant. Therefore, if we decrease the uncertainty in the location of a particle along an axis, it will necessarily increase the uncertainty in the particle's momentum along that axis.

This relationship can be expressed mathematically as:

Δx * Δp ≥ h/4π

where Δx is the uncertainty in the position of the particle along the axis, Δp is the uncertainty in the momentum of the particle along the same axis, and h is Planck's constant.

If we decrease Δx, the left-hand side of the inequality decreases, which means that Δp must increase in order to satisfy the inequality. Therefore, decreasing the uncertainty in the location of a particle along an axis will increase the uncertainty in the particle's momentum along that axis.

If we change an experiment so to decrease the uncertainty in the location of a particle along an axis, the uncertainty in the particle’s momentum along that axis is increases

This principle is based on the Heisenberg Uncertainty Principle, which states that there is a fundamental limit to the precision with which we can simultaneously know the position and momentum of a particle. In mathematical terms, this principle can be represented as Δx * Δp ≥ ħ/2, where Δx represents the uncertainty in position, Δp represents the uncertainty in momentum, and ħ is the reduced Planck constant.The Heisenberg Uncertainty Principle highlights the trade-off between the precision of position and momentum measurements.

As you reduce the uncertainty in the position (Δx) of a particle, the uncertainty in its momentum (Δp) must increase to maintain the inequality, this phenomenon is a consequence of the wave-particle duality of quantum particles, which means that particles exhibit both wave-like and particle-like properties. Consequently, as you try to more accurately pinpoint a particle's location, you inherently disturb its momentum, leading to greater uncertainty in its momentum along the same axis. So therefore when you decrease the uncertainty in the location of a particle along an axis, the uncertainty in the particle's momentum along that axis increases.

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Answer:

Good conducters of heat and electricity. High melting points. high density. malleable. Ductile.

Explanation:

\(\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}\)

Actually Welcome to the Concept of the Electrostatics.

Basically here we can see that, the Negative test charge usually a Electron is facing a force from the right side, this we can say that a Electric field as like charge is creating a repulsive force from the right to left side.

thus,

1) The electric field points to the left because the force on a negative charge is opposite to the direction of the field.

The magnitude of vector A is 5.1.

This can be found by using the Pythagorean theorem, which states that the magnitude of a vector can be found by taking the square root of the sum of the squares of its components.

In this case, A can be broken down into two components, A = 4i + j. The magnitude of A is then calculated by taking the square root of 4² + 1², which is equal to 5.1.

To solve the problem, we can use the information given in the question. Vector B added to A gives a result of 6i + j, and subtraction of B from A gives -4i + 7j. We can add these two equations to obtain A = 2i + 8j. We can then use the Pythagorean theorem to calculate the magnitude of A, which is 5.1.

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Answer:

7.5x10-^8m

Explanation:

the formulae is v=fh ,where f is frequency

h is wavelength

hence wavelength=v/f

since the speed of light is 3x10^8

then the wavelength =3 x 10^8/4 x 10^15

=7.5x10^-8m

Answer: It’s kinetic energy

Explanation: when you move your hand or foot, your body has converted potential energy into kinetic energy.

The correct answer is C) Both of them. When an object is completely submerged in a liquid, both the pressure on the object and the buoyant force on the object depend on the depth of the object in the liquid.

The pressure on the object increases with depth due to the weight of the liquid above the object. Pressure is calculated as P = ρgh, where P is pressure, ρ is the density of the liquid, g is the acceleration due to gravity, and h is the depth.

The buoyant force on the object is determined by Archimedes' principle, which states that the upward force acting on a submerged object is equal to the weight of the liquid displaced by the object. The buoyant force depends on the volume of the object and the density of the liquid, both of which are affected by the depth in the liquid. The buoyant force can be calculated as F_b = ρVg, where F_b is the buoyant force, V is the volume of the displaced liquid, and the other variables are as described above.

In summary, both the pressure on the object and the buoyant force on the object depend on the depth of the object in the liquid, as they both are related to the density of the liquid and the depth at which the object is submerged.

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Answer:

B or D

Explanation:

I wanna say B but I don't really know if it's a trick question

my explanation for D is that anvils are usually 110 decibles and ear drums usually are damaged when exposed to 82dbs or higher at a consistant rate so I'd imagine that'd be the answer I hoped this helped

Answer:

the answer is B

Explanation:

Any harmful noises can be bad. yes, an Anvil and Hammer can be bad but so can explosions and gun fire and having music to loud

One Newton is equivalent to 1 kg*m/s². This means that a force of one Newton will cause a mass of one kilogram to accelerate at a rate of one meter per second squared.

The unit of Newton is commonly used in physics to measure force. It is named after Sir Isaac Newton, who made significant contributions to the field of physics. Newton's laws of motion are fundamental principles that govern the behavior of objects in motion, and the unit of Newton is used to quantify the force required to cause an object to move or change its motion. Understanding the concept of force and its measurement is essential in various fields, including engineering, mechanics, and physics. In conclusion, one Newton is equivalent to 1 kg*m/s², and this unit is widely used to measure force.

The angle between the resultant and the larger force is 60 degree if resultant force value is value 9.1 Newtons. We know that resultant force of one newton  given by the superposition principle which uses a formula Resultant force =√((F₁)² + (F₂)² + 2 ˣ F₁ ˣ F₂ ˣ cosθ) Superposition principle of electric force to find the resultant power, all accuses are thought about independently of that specific charge as though any remaining charges are missing. Along these lines, for each charge, the power on that specific charge is to be found out. Then the vector amount of the multitude of forces gives the resultant forces on that charge.

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Answer:

Uranus

Explanation:

it's uranus....

Explanation:

Ellie, the machine that can detect depression

Technology is an important channel to treat mental illness,

Abuse. Physical or emotional abuse can make you more vulnerable to depression later in life.

Age. People who are elderly are at higher risk of depression. That can be made worse by other factors, such as living alone and having a lack of social support.

Certain medications. Some drugs, such as isotretinoin (used to treat acne), the antiviral drug interferon-alpha, and corticosteroids, can increase your risk of depression.

Conflict. Depression in someone who has the biological vulnerability to it may result from personal conflicts or disputes with family members or friends.

Death or a loss. Sadness or grief after the death or loss of a loved one, though natural, can increase the risk of depression.

Gender. Women are about twice as likely as men to become depressed. No one's sure why. The hormonal changes that women go through at different times of their lives may play a role.

Genes. A family history of depression may increase the risk. It's thought that depression is a complex trait, meaning there are probably many different genes that each exert small effects, rather than a single gene that contributes to disease risk. The genetics of depression, like most psychiatric disorders, are not as simple or straightforward as in purely genetic diseases such as Huntington's chorea or cystic fibrosis.

Major events. Even good events such as starting a new job, graduating, or getting married can lead to depression. So can moving, losing a job or income, getting divorced, or retiring. However, the syndrome of clinical depression is never just a "normal" response to stressful life events.

Other personal problems. Problems such as social isolation due to other mental illnesses or being cast out of a family or social group can contribute to the risk of developing clinical depression.

Serious illnesses. Sometimes, depression happens along with a major illness or may be triggered by another medical condition.

Substance misuse. Nearly 30% of people with substance misuse problems also have major or clinical depression. Even if drugs or alcohol temporarily make you feel better, they ultimately will aggravate depression.

In this given circuit, there are two resistors, R2 and R3 connected in series with a battery of 12 V as shown below;\(\Delta V = V = 12 V\)Let us first find the total resistance of the circuit.

Using the formula, resistances in series add up to give the total resistance of the circuit\(R_T = R_2 + R_3 = 8\ \Omega + 12\ \Omega = 20\ \Omega\)

Using Ohm's Law; the current through the circuit can be calculated as follows;

\(I_T = \frac{V}{R_T} = \frac{12\ V}{20\ \Omega} = 0.6\ A\)

Thus, the current through each of the resistors, R2 and R3 is the same and it is equal to the total current of the circuit;\(I_1 = I_2 = 0.6\ A\)

The potential difference across each of the two resistors, R2 and R3 is different because of the difference in resistance. Using Ohm's Law, the potential difference across each resistor can be calculated as follows;

\(\Delta V_2 = V_{R_2} = I_2 \cdot R_2 = 0.6\ A \cdot 8\ \Omega = 4.8\ V\)

\(\Delta V_3 = V_{R_3} = I_2 \cdot R_3 = 0.6\ A \cdot 12\ \Omega = 7.2\ V\)

Thus, the potential difference across resistor R2 is 4.8 V and across resistor R3 is 7.2 V.

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Answer:

B. point on the surface directly above the earthquake

Explanation:

The earthquake involves the propagation of waves through the inner part of the earth due to natural or artificial processes. This majorly leads to the vibration of the earth crust of the affected region as the waves propagates. Thereby, causing sometimes the a violent break up of the surface of the earth from within.

Therefore, the focus of an earthquake is majorly called its epicenter, which is a point on the surface directly above the earthquake itself.

The momentum of a 30-kg dog running at a speed of 6 m/s is 180kgm/s.

This is referred to as a measurable quantity of movement in a body or object and is used in science to define the quantity of motion.

It is also known as the product of the mass and velocity of an object and can be calculated by the following below:

Mass = 30kg dog, velocity = 6 m/s

Therefore the momentum of the body is 30kg × 6m/s = 180kgm/s.

This is however the correct choice.

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Life tables summarize the probabilities of survival and mortality for individuals of different age groups within a population.

By studying the life history of endangered species, ecologists can identify critical life stages and factors influencing population declinesLife Tables show how long different age groups are likely to live, and how many people survive at each age.

By examining life tables, ecologists can:

Survivorship curves show how many individuals in a population survive over a period of time.

Ecologists who study animals that are in danger of becoming extinct, like red pandas, use life tables and survivorship curves to learn many things.

Life tables assist us in comprehending the variations in the size of a population, death rates that correspond to specific age groups, and the complete biography of a species.

Survivorship curves visually illustrate the proportion of individuals who survive at each age throughout their lives. They provide a depiction of the typical mortality trends present in a group of individuals and aid in recognizing unique approaches to survival.

Survivorship curves show how many individuals in a population survive over a period of time. They make a graph that shows how many people are still alive at each age. Survivorship curves show how many animals or people will survive or die in a population over time.

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Answer: Kinetic Energy

Explanation: This energy would be the highest because it is when the falling ball would be moving the fastest.

Explanation:

A=b+d that is the way to rewrite the equation