which female chemist is credited with developing kevlar? in what year?

Answer:

Explanation:

a. normal  force is mass * acceleration due to gravity, so the normal force is = 4 * 9.8, which is 39.2 N.

b. friction force is normal force * the coefficient of the friction, for static friction: .3 * 39.2 = 11.76 N. For kinetic friction: .1 * 39.2 = 3.92 N.

c. net force is the sum of all force apply on the object, since the object is rest at a table, then the only force apply on the object is the horizontal force, which is 10N, since the static force is greater than the force apply, then our net force is -1.76N( 10 - 11.76).

d. the acceleration of the box is 0 because the box is not moving.

a : normal force = 39.2N

b : static force = 11.76N, kinetic force = 3.92N

c : net force = -1.76N

d : acceleration = 0

The flow rate through the bend may be calculated using these equations to be 7.01 ft3/s, and the y-direction anchoring force needed to keep the bend in place is 674 pounds.

General solutions to the issue.

Step 1: Calculate the flow rate through the bend using Bernoulli's equation.

Step 2: Calculate the y-direction anchoring force necessary to hold the bend in place using the momentum equation.

Step 3: Hold the bend in place using the x-direction and y-direction anchoring forces.

The common equations that can be applied are:

Bernoulli's equation: P1 + 0.5 rhov 1 + rhogh 1 = P2 + 0.5 rhov 2 + rhogh 2 where P1 = pressure at inlet, v1 = velocity at inlet, h1 = height at inlet, P2 = pressure at outlet, v2 = velocity at outlet, h2 = height at outlet, rho = fluid density, and g = gas constant.

the speeding up caused by gravity.

FAY is the y-direction anchoring force, Q is the flow rate, v1 is the velocity at the inlet, and v2 is the velocity at the outlet. The momentum equation is FAY = rhoQ(v2 - v1).

It should be noted that the flow rate through the bend is calculated independently of the x-direction anchoring force.

The flow rate through the bend may be calculated using these equations to be 7.01 ft3/s, and the y-direction anchoring force needed to keep the bend in place is 674 pounds.

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The flow rate through the bend is 7.01 ft^3/s, and the y-direction anchoring force, FAY required to hold the bend in place is 674 lbs. in.

To solve this problem, we can use the Bernoulli equation to relate the pressure and velocity of the water at different points along the bend. We can then use the conservation of mass equation to find the flow rate through the bend.

Using the given pressure gauge reading of 10 psi, we can determine the velocity of the water at point A using the Bernoulli equation. Solving for the velocity yields 34.77 ft/s. Using this velocity and the given geometry of the bend, we can determine the area of the flow at point A as 0.2019 ft^2.

Using the conservation of mass equation, we can relate the flow rate at point A to the flow rate at point B. Solving for the flow rate at point B yields 7.01 ft^3/s.

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Applying rated voltage to the primary winding during current ratio testing might produce excessive current flow, overheating, and damage to the transformer. In order to assure precise and safe testing.

The winding might carry so much current that it would overheat and be damaged if you applied direct current at rated voltage (the rating would be for rms AC voltage).

Because the wattmeter is attached to the primary side, this guarantees that the low range of metres can be utilised for this test (High voltage side). Because of this, the primary side is typically selected.

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Answer:

between the fuel tank and the engine

Answer:

True.

Explanation:

While CRISPR is a more accurate and effective tool for editing DNA than other genetic engineering techniques, it is different from them. additional genetic engineering techniques, including transgenic modification.

The ability to simultaneously edit numerous loci is another benefit of CRISPR/Cas9, which makes this method simpler, more effective, and more scalable when compared to previous genome editing techniques.

While CRISPR-Cas9 frequently makes mistakes, it consistently recognises the target location on the DNA. When they connect to their target sequences and cleave the DNA at the precisely intended spot, the upgraded versions eCas9 (centre) and Cas9-HF (right) are even more accurate.

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The Normal Force acting on the box is 39.2 N.

The Friction Force acting on the box is 11.76 N.

a. The Normal Force, denoted by N, is equal in magnitude to the weight of the box, which is given by:

N = mg

where m is the mass of the box and g is the acceleration due to gravity. Substituting the given values, we get:

N = 4 kg × 9.8 m/s² = 39.2 N

Therefore, the Normal Force acting on the box is 39.2 N.

b. The Friction Force, denoted by Ff, can be found using the formula:

Ff = μN

where μ is the coefficient of friction and N is the Normal Force. Since the box is initially at rest, the static coefficient of friction applies. Substituting the given values, we get:

Ff = 0.30 × 39.2 N = 11.76 N

Therefore, the Friction Force acting on the box is 11.76 N.

c. The Net Force, denoted by Fnet, is the sum of all the forces acting on the box. In this case, we have:

Fnet = Fapplied - Ff

where Fapplied is the applied force. Substituting the given values, we get:

Fnet = 10 N - 11.76 N = -1.76 N

The negative sign indicates that the direction of the net force is opposite to the direction of the applied force.

d. The acceleration of the box, denoted by a, can be found using the formula:

a = Fnet/m

where m is the mass of the box. Substituting the given values, we get:

a = (-1.76 N) / 4 kg = -0.44 m/s²

Therefore, the acceleration of the box is -0.44 m/s², which indicates that the box is slowing down in the direction of the applied force.

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The accumulation of excess electrical charges on an object is known as electrostatics.

The excess electrical charges on an object can either be positive or negative. The negative charge has an excess of electrons while the positive charge has a lack of electrons. The term electrostatics was first used by British scientist William Gilbert in 1600 to describe the study of electrical charges at rest.Electrostatics is important because it helps us to understand the fundamental principles of electrical charges, which is a significant part of the science of physics. Electrostatics is also used in everyday life.

For example, electrostatics can be used to remove dust from furniture and floors, as well as in photocopying machines and air filters. It is also used in industrial applications such as painting, where a charged spray of paint is directed towards an object that is grounded, causing the paint to stick to the object.There are different types of electrostatics. The first is static electricity, which is the buildup of electric charges on an object at rest. The second is current electricity, which is the flow of electric charges through a conductor.

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The value of the resistor that will result in no power being dissipated is when the current through the resistor is zero.

To determine this, we will use the power formula:
Power (P) = Voltage (V) x Current (I)
1: Since we want no power dissipation, set P to 0:
0 = V x I
2: To have no power dissipation, either the voltage across the resistor or the current through it must be zero. If the voltage is non-zero, then the current must be zero:
I = 0
3: According to Ohm's law, V = I x R, where R is the resistance. If I = 0, then it doesn't matter what the resistance is; the voltage will also be zero, and no power will be dissipated.
In conclusion, any value of the resistor will result in no power being dissipated if the current through the resistor is zero.

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A chemical reaction can be concisely represented by a chemical equation.

A chemical equation is a symbolic representation of a chemical reaction that involves the use of chemical symbols and formulas. It shows the starting materials (reactants) and products that are produced as a result of the reaction.

In chemical reactions, the chemical makeup of the reactants is modified to produce new substances known as products, and this is represented in the chemical equation.

The general format for a chemical equation is as follows:

Reactant + Reactant → Product + Product

For example, the reaction between hydrogen and oxygen to produce water can be represented by the following chemical equation: 2H2 + O2 → 2H2O

In this equation, hydrogen and oxygen are the reactants, while water is the product. The numbers before each molecule indicate the number of atoms or molecules that participate in the reaction.

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The type of marine vessel that typically uses large insulated spherical tanks for product storage and has cargo piping located above the main deck is a liquefied gas carrier.

Liquefied gas carriers are marine vessels that are utilized for the transportation of liquefied gases such as ammonia, propane, butane, and other hazardous and non-hazardous chemicals that need low-temperature storage facilities. These carriers are constructed to transport liquefied gases under low temperature and high pressure. Liquefied gases are typically transported at a temperature of -150 degrees Celsius and a pressure of 0.3 to 1.5 MPa. Large insulated spherical tanks. The large spherical tanks used in liquefied gas carriers are a vital component of the vessel that stores the product, and they are specifically constructed to manage low-temperature storage environments. Liquefied gases are stored in large spherical tanks, which are insulated with layers of materials such as perlite, glass wool, or foam glass, to maintain a low temperature and prevent vaporization of the stored gas.

These tanks are usually located on the main deck of the ship, which is also referred to as the weather deck. Cargo piping Liquefied gas carriers have cargo piping located above the main deck, which is specifically designed to transfer the product from the storage tanks to the cargo holds or from the cargo holds to the storage tanks. The piping system is mainly made up of stainless steel, which is resistant to low temperatures and high pressures, ensuring that the product is transported securely and effectively from the storage tanks to the cargo holds.

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The percentage of atrazine in the soil phase is 1.35*10^-8

The percentage of atrazine in the soil phase is 1.45%

The percentage of atrazine in the fish phase is 6.7*10^-5

The partition coefficient for atrazine between water and organic carbon (Koc) can be calculated using the empirical equation provided is 0.006.

The Kow value is 1.499. The distribution coefficient is 0.066.

The concentration of atrazine in water will be;

= 0.027 / 2000000 × 10^-8

= 1.35 × 20^-8

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To determine the compressibility and bulk modulus of elasticity of the gas, we can use the following equations:

Compressibility (β) = - (1/V) x (dV/dP)

Bulk modulus of elasticity (K) = - V x (dP/dV)

Where V is the volume of the gas and P is the pressure.

Using the given values:

Initial volume (V1) = 0.30 m^3

Initial pressure (P1) = 50.7 kPa

Final volume (V2) = 0.111 m^3

Final pressure (P2) = 202.8 kPa

We can calculate the change in volume (dV) and the change in pressure (dP):

dV = V2 - V1 = 0.111 m^3 - 0.30 m^3 = -0.189 m^3

dP = P2 - P1 = 202.8 kPa - 50.7 kPa = 152.1 kPa

Now, we can calculate the compressibility and bulk modulus of elasticity:

β = - (1/V1) x (dV/dP) = - (1/0.30 m^3) x (-0.189 m^3/152.1 kPa) ≈ 0.0048/kPa

K = - V1 x (dP/dV) = - 0.30 m^3 x (152.1 kPa/-0.189 m^3) ≈ 2522.2 kPa

Therefore, the compressibility of the gas is approximately 0.0048/kPa and the bulk modulus of elasticity is approximately 2522.2 kPa.

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To address about the super- and subclasses of a salaried employee, we need to consider the context of the class hierarchy.

In general, the superclass of a "SalariedEmployee" would be the more generic "Employee" class. The "Employee" class would contain common attributes and methods that apply to all types of employees, such as name, employee ID, and contact information.

The "SalariedEmployee" class, in this case, is a subclass of the "Employee" class. It inherits attributes and methods from the superclass "Employee" and may also have additional attributes and methods specific to salaried employees, such as annual salary and bonus calculations.

There could be other subclasses of the "Employee" superclass as well, such as "HourlyEmployee" or "CommissionEmployee," which would have their own specific attributes and methods related to their respective payment structures.

To summarize:
- The superclass of a "SalariedEmployee" is the "Employee" class.
- The "SalariedEmployee" class is a subclass of the "Employee" class, and it may have additional attributes and methods specific to salaried employees.

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Answer: To determine if the tubing sizing was done properly, we need to compare the operating rates for each tubing diameter in the given range. We can use the following formula to calculate the well's production rate:

Explanation:

Production rate = (Productivity index) x (Wellhead pressure - Tubing pressure)

Assuming a tubing pressure of 0 psig (i.e., no pressure drop through the tubing), the production rate for each tubing diameter can be calculated as follows:

For 1 inch tubing:

Production rate = (1 bpd/psi) x (150 psig - 0 psig) = 150 bpd

For 1.5 inch tubing:

Production rate = (1 bpd/psi) x (150 psig - 0 psig) = 150 bpd

For 2 inch tubing:

Production rate = (1 bpd/psi) x (150 psig - 0 psig) = 150 bpd

For 2.5 inch tubing:

Production rate = (1 bpd/psi) x (150 psig - 0 psig) = 150 bpd

For 3 inch tubing:

Production rate = (1 bpd/psi) x (150 psig - 0 psig) = 150 bpd

For 3.5 inch tubing:

Production rate = (1 bpd/psi) x (150 psig - 0 psig) = 150 bpd

As we can see, the production rates are the same for all tubing diameters in the given range. This means that the tubing sizing was not done properly, as increasing the tubing diameter should have increased the production rate.

However, it's important to note that this analysis assumes no pressure drop through the tubing, which may not be realistic. If there is significant pressure drop through the tubing, selecting a larger diameter tubing may actually decrease the production rate due to increased frictional losses. Therefore, a more detailed analysis is required to properly size the tubing for a specific well.

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The calculated voltage that would be applied to the Control Panel is 20.8 volts.

Since the panel K is 120/208V, 3Ø, 4-W, we know that it has a high leg or wild leg that supplies 208 volts to phase-to-neutral loads and 240 volts to phase-to-phase loads.

To obtain 230 volts, which is required for the control panel, we need to step down the voltage using a transformer.

A 120/240V-12/24V Group I transformer can be used to step down the voltage from 208V to 24V. Since this is a step-down transformer, the voltage across the primary winding will be greater than the voltage across the secondary winding.

The transformer turns ratio is calculated as follows:

Turns ratio = primary voltage / secondary voltage

For the given transformer, the turns ratio is:

Turns ratio = 240V / 24V = 10

Since the input voltage is exactly 208 volts, the voltage across the primary winding of the transformer will also be 208 volts. Therefore, the voltage across the secondary winding can be calculated as follows:

Secondary voltage = Primary voltage / Turns ratio

Secondary voltage = 208V / 10 = 20.8V

Thus, the calculated voltage that would be applied to the Control Panel is 20.8 volts.

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Note that in general, general liability policies may have exclusions for certain types of claims or events, such as intentional acts, professional errors, or damage to the contractor's own property.

A general liability insurance policy is a type of insurance that provides coverage for a business or individual against claims for bodily injury, property damage, and personal injury that arise from the premises, operations, or products of the insured.

It typically covers legal costs and settlements or judgments up to the policy limit. General liability insurance can help protect a business from financial loss due to lawsuits or claims filed against it.

Thus, Hans has coverage under his general liability policy for suits filed against him arising out of all of the following EXCEPT:  intentional acts, professional errors, or damage to the contractor's own property.

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Answer: v(5) = 20.8 m/s

Explanation:

To solve this problem, we need to use the equation of motion for the particles in the x-direction:

F = ma

where F is the net force acting on the particles, m is the mass of the particles, and a is the acceleration of the particles.

The force acting on the particles is the tension force, TE, which is given as TE = 3t² + 4 N. Since the particles are connected by the rope, they all experience the same tension force.

The mass of each particle is 3 kg, so the total mass of the system is 12 kg.

We can now find the acceleration of the particles:

F = ma

TE = ma

a = TE/m

a = (3t² + 4 N)/(12 kg)

a = (1/4)t² + (1/3) m/s²

To find the velocity of the particles after 5 seconds, we need to integrate the acceleration with respect to time:

v = ∫a dt

v = ∫[(1/4)t² + (1/3)] dt

v = (1/12)t³ + (1/3)t + C

where C is the constant of integration. To find C, we can use the initial condition that the particles are at rest at t = 0:

v(0) = 0

C = 0

Thus, the velocity of the particles after 5 seconds is:

v(5) = (1/12)(5)³ + (1/3)(5) m/s

v(5) = 20.8 m/s

The distance between the electron and the nucleus is not fixed for an electron in a specific orbit in the Bohr model of the atom.

The electron can move around the nucleus in a circular orbit, and its distance from the nucleus can vary.

The Bohr model of the atom is a simple way of visualizing the structure of the atom. In this model, the atom consists of a small, positively charged nucleus surrounded by one or more electrons in orbit. The electrons revolve around the nucleus in circular orbits of fixed energy. However, the electrons are not actually fixed in these orbits; instead, they can jump from one orbit to another by absorbing or emitting a quantum of energy.

Therefore, the distance between the electron and the nucleus is not fixed, but can change depending on the energy of the electron.

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The heat rejected by the engine into the atmosphere is 53440 J.

According to the law of conservation of energy, the total energy of the system (engine + mass) is conserved.

The energy supplied to the system by the engine is used to lift the mass against gravity and to do some work against frictional forces, which ultimately gets dissipated as heat energy into the atmosphere.

The work done in lifting the mass against gravity is given by:

Work = Force x Distance = m x g x h

where

m = mass of the object = 20 kg

g = acceleration due to gravity = 9.8 m/s^2

h = height lifted = 110 m

So, Work = 20 x 9.8 x 110 = 21560 J

The heat energy supplied by the engine is used to do the work and overcome the frictional forces. Therefore, the remaining heat energy must be dissipated into the atmosphere. So, the heat rejected by the engine is:

Heat rejected = Heat supplied - Work done

= 75000 - 21560

= 53440 J

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The force in member BC is 2.60 AB.

How to determine the force in member BC?

Therefore, the force in member BC can be determined by resolving forces in horizontal and vertical direction.

Resolving forces in horizontal direction

ΣFx = 0-ABsin 45° + BCsin 30°

= 0BCsin 30°

= ABsin 45°BC

= AB (sin 45° / sin 30°)

= 3AB

Resolving forces in vertical direction

ΣFy = 0-AC - ABcos 45° - BCcos 30°

= 0AC

= - ABcos 45° - BCcos 30°AC

= - AB (1/√2) - 3AB(√3 / 2)

= - 2.232 AB

Now, the force in member BC can be calculated as:

FB = BC sin 30°FB= 3AB(sin 45° / sin 30°)(√3 / 2)

FB = 2.598 AB

Hence, the force in member BC is 2.60 AB and it is in tension. Therefore, the appropriate units will be applied to this answer, which are unknown.

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The net force in the radial direction must be zero to balance the system. This means that the sum of the forces in the x and y directions must be zero. We can write the equations as follows:

ΣFx = ma_r = 0

ΣFy = ma_θ = 0

where a_r and a_θ are the radial and tangential accelerations, respectively. The tangential acceleration is zero because the system is in equilibrium.

Let M be the total mass of the system. Then, the magnitude of mass a can be found using the equation:

Ma_r = Mb(a+b)sinθ

where θ is the angle between the radii of masses b and a. Since the system is balanced, we have:

Ma_r = Mb(a+b)sinθ = 0

Since Mb ≠ 0 and sinθ ≠ 0, we must have a = -b. This means that mass a must be 7 kg.

Next, we can find the magnitude of mass c using the equation:

Mc(a+c)sin(90°-θ) = Mb(b+c)sinθ

Substituting the values, we get:

Mc(a+c) = Mb(b+c)cosθ

Mc(a+c) = 7(b+c)cosθ

Similarly, we can find the magnitude of mass d using the equation:

Md(a+d)sin(θ-240°) = Mb(b+d)sinθ

Substituting the values, we get:

Md(a+d) = Mb(b+d)cos(θ-240°)

Md(a+d) = 7(b+d)cos(θ-240°)

Finally, to find the angular position of mass a, we can use the equation:

ΣFy = Ma_θ + Mb(b+a)cosθ + Mc(c+a)cos(90°-θ) + Md(d+a)cos(θ-240°) = 0

Substituting the values, we get:

7a + 14cosθ + 7c - 7dcosθ = 0

a + 2cosθ + c - dcosθ = 0

This equation can be solved numerically to find the value of θ.

The ability of a mineral to break smoothly when struck with a hammer along particular internal planes is known as cleavage. So option B is the correct answer.

When a crystal is stressed on a specific plane, it breaks, which is referred to as cleavage in the mineral world. The mineral has cleavage if a portion of a crystal fractures under stress and the broken piece still has a smooth plane or crystal shape. There is no cleavage in a mineral that, when broken off, never yields any crystallised fragments.

Perfectly cleaved minerals will separate cleanly, leaving behind a full, smooth plane where the crystal broke. Although they frequently leave behind minor residual rough surfaces, minerals with good cleavage also leave smooth surfaces. The smooth crystal edge is less noticeable on minerals with poor cleavage because the rough surface predominates.

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The engineering and science of architecture strives to understand the forces, or Stresses, pushing or pulling the structure of the building. When these forces pull they create Tension.

Newton's Laws are where we begin our investigation into how motion actually occurs in the real world. The investigation of these influences is known as dynamics or mechanics. Isaac Newton established the connection between force and acceleration in his three laws of motion, which form the foundation of fundamental physics. The best introduction to the fundamental laws of nature is Newton's formulation of physics, even if it later needed to be changed to account for motion at speeds comparable to the speed of light and for motion on the size of atoms. It is also relevant to daily circumstances. The study of Newton's rules and their effects is known as classical or "Newtonian" mechanics.

Particles accelerate because of forces at work on them.

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The maximum ampacity for a 3 AWG THHN copper conductor where the temperature termination on one end is rated 75 degree C and the rating of the temperature termination on the other end is unknown is 100 amps.

What is the maximum ampacity for a 3 AWG THHN copper conductor? For a 3 AWG THHN copper conductor, the maximum ampacity is 100 amps. It is important to note that ampacity ratings are the maximum current that a conductor can carry under ideal conditions; a number of factors, such as raceway, ambient temperature, insulation, and temperature ratings, can influence the actual ampacity of a given conductor.

There are three current-carrying conductors in the raceway, and the ambient temperature is not expected to exceed 30 degrees Celsius, according to the given scenario. Voltage drop requirements will not be exceeded, and the temperature rating of the other end of the termination is unknown. As a result, the maximum ampacity for a 3 AWG THHN copper conductor is 100 amps.

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Huffman encoding's longest codeword is n-1 bits long. For instance, f i = 2(i-1)/2n.

The length of the longest codeword is n 1. This number is obtained by encoding n symbols, where n 2 of them have probabilities of 1/2,1/4,...,1/2n-2, and two of them have probabilities of 1/2n-1. Never can a codeword be longer than length n 1.

The longest code, or the maximum depth, is 255.ac if by "all bytes" you mean the 256 potential byte values that can be used as symbols.

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Inline foam proportioners can compromise firefighter safety by slowing them down since they require the concentrate to be available where the nozzle is being operated.

Inline foam proportioners are commonly used in firefighting operations to mix foam concentrate with water in a predetermined ratio to produce foam for firefighting. However, this type of foam proportioner can also compromise firefighter safety by slowing them down. Inline foam proportioners require the foam concentrate to be available where the nozzle is being operated. This means that firefighters have to carry the concentrate with them, which can be cumbersome and heavy. It also means that they have to take extra time to set up the proportioner and connect the concentrate supply to the nozzle, which can delay firefighting operations. This delay can be particularly dangerous in high-pressure situations, where every second counts. As a result, some firefighting departments have switched to using eductor-type foam proportioners that do not require the foam concentrate to be carried to the nozzle.

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SpaceX recently launched the CRS-23 mission to the International Space Station (ISS), from Launch Complex 39A at NASA's Kennedy Space Center in Florida.

The mission was launched using a Falcon 9 rocket, and it marked the 23rd Commercial Resupply Services mission for SpaceX under a contract with NASA.

The Dragon spacecraft carried more than 4,800 pounds of supplies and scientific payloads to the ISS, including new solar arrays, a new robotic arm, and experiments focused on studying the effects of microgravity on tissue engineering and the human body. The mission also carried a new docking adapter that will allow future spacecraft to dock autonomously with the ISS.

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The formula for axial compressive stress isσa = F/Awhere,σa is axial compressive stress F is force A is cross-sectional area.

How to find the axial compressive stress? A 1/2 - 0.5 lead screw's compressive force is 14 lbf. The formula for the area of a screw is A = πd²/4Where A is the cross-sectional area and d is the screw's diameter. Now, d = 1/2 - 0.5 = 0To find the cross-sectional area of the screw,

we will use the formula A = πd²/4 = π(0)²/4 = 0 As a result, we must consider the pitch of the screw to be the length we're compressing since the screw's diameter is negligible. The pitch of the screw is 0.5 inches. So, F = 14 lbfA = pitch = 0.5 in = 0.0417 ftσa = F/A = 14 lbf/0.0417 ft = 335.7 psithe axial compressive stress in psi is 335.7.

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