Engineering High School

What is the hazard present in this image?.
Select the best option.
Poor housekeeping
No guardrails/covers
Lifting strap is damaged
Unstable stacked materials
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CornerSafe “ i don’t know what this means”

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Answer 1
Answer

Based on the given options, the hazard present in the image could be "Unstable stacked materials."

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Two 40-ft long wires made of different materials are supported from the ceiling of a testing laboratory. Wire 1 is made of material H and has a diameter of 3/8 in. Wire 2 is made of material K and has a diameter of 3/16 in. When a load of 225 lb is applied to its lower end, wire 1 stretches 0.10 in. When the same 225 lb load is applied to the lower end of wire 2, wire 2 stretches 0.25 in. Compare materials H and K. Which material has the greater modulus of elasticity? Which is the stiffer material?

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Answer:

Yes! I can help with.

Explanation:

To compare materials H and K, we need to determine the modulus of elasticity for each material. The modulus of elasticity is a measure of a material's stiffness, specifically the amount of stress required to produce a given amount of strain.

We can use the formula:

stress = force / area

strain = change in length / original length

modulus of elasticity = stress / strain

Let's start by calculating the stress on each wire:

For wire 1:

stress = force / area = (225 lb) / ((pi/4) * (3/8 in)^2) = 7,655 psi

For wire 2:

stress = force / area = (225 lb) / ((pi/4) * (3/16 in)^2) = 30,620 psi

Next, we can calculate the strain on each wire:

For wire 1:

strain = change in length / original length = 0.10 in / 480 in = 0.000208

For wire 2:

strain = change in length / original length = 0.25 in / 480 in = 0.000521

Finally, we can use the formula to calculate the modulus of elasticity for each material:

For material H:

modulus of elasticity = stress / strain = 7,655 psi / 0.000208 = 36,824,038 psi

For material K:

modulus of elasticity = stress / strain = 30,620 psi / 0.000521 = 58,745,334 psi

Therefore, material K has the greater modulus of elasticity and is the stiffer material.

A blocked drain on a pressure-reducing valve will
A) Result in no reduction of pressure
B) Prevent flow from the outlet of the valve
C) Block the inlet of the valve
D) Drop system pressure to zero

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Answer:

Yes! I can Answer that!

Explanation:

C) Block the inlet of the valve.

A blocked drain on a pressure-reducing valve can prevent the valve from functioning correctly by blocking the drain line that is used to relieve excess pressure from the valve. As a result, the inlet of the valve can become blocked, causing the valve to malfunction and preventing it from reducing pressure. It is important to keep the drain line clear to ensure that the pressure-reducing valve works properly.

A 35-ft long solid steel rod is subjected to a load of 8,000 lb. This load causes the rod to stretch 0.266 in. The modulus of elasticity of the steel is 30,000,000 psi. Determine the diameter of the rod (precision of 0.00)

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Answer:

The diameter of the rod can be determined using the following formula:

Explanation:

d = sqrt(4L / (pi * E * delta))

where:

d = diameter of the rod

L = length of the rod = 35 ft

E = modulus of elasticity of the steel = 30,000,000 psi

delta = elongation of the rod = 0.266 in

First, we need to convert the length of the rod and elongation to inches to maintain consistency with the units of E:

L = 35 ft * 12 in/ft = 420 in

delta = 0.266 in

Substituting the given values into the formula:

d = sqrt(4 * 420 / (pi * 30,000,000 * 0.266))

d = 0.615 in (rounded to 0.01)

Therefore, the diameter of the steel rod is 0.62 inches (rounded to 0.01).

The vanelli family is building a house and wants to save anywhere the can which of the following choices would be the most electric system for them to operate

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Note that if the  vanelli family is building a house and wants to save anywhere they can the choice that would be most expensive electric system for them to operate is a Heat Pump. (Option a)

What is a heat pump?

A heat pump is a device tha tuses electricity to generate heat so that during winter and very cold period, the house is kept warm.

This is notably one of th most expensive devices to maintain in a home.

Hence it will be very expensive for the Vanelli familyto build a house that has many heat pumps. They can opt for solar powered heat pumpts instead.

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The Vanelli family is building a house and wants to save money anywhere they can. Which of the

following choices would be the most expensive electric system for them to operate?

A. Heat pump

B. Baseboard

C. Radiant ceiling

D. Program clock

Using a doorbell circuit as an example, explain why wiring a doorbell button switch in the normally-open state is preferred.

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Answer:

Here is your Answer Bellow!

Explanation:

Wiring a doorbell button switch in the normally-open (NO) state is preferred because it is safer and more reliable than wiring it in the normally-closed (NC) state.

In a doorbell circuit, when the doorbell button is pressed, it completes the circuit and allows current to flow to the doorbell, causing it to ring. In the NC configuration, the button switch is always closed, and current flows through the circuit even when the button is not pressed. This can cause several problems, such as short circuits, overheating, and premature wear on the doorbell and other components in the circuit.

On the other hand, in the NO configuration, the button switch is open when it is not pressed, and no current flows through the circuit. When the button is pressed, it closes the circuit and allows current to flow, causing the doorbell to ring. This configuration is safer because it minimizes the risk of short circuits, overheating, and premature wear on the components in the circuit.

In addition to being safer, the NO configuration is also more reliable because it is less prone to false triggers. In the NC configuration, the button switch can be triggered by vibration, accidental contact, or other factors, causing the doorbell to ring unnecessarily. In the NO configuration, however, the button switch must be deliberately pressed to trigger the doorbell, making it less likely to ring accidentally.

Overall, wiring a doorbell button switch in the normally-open state is the preferred configuration for safety, reliability, and durability.

Wiring a doorbell button switch in the normally-open (NO) state is preferred because it is safer and more reliable than wiring it in the normally-closed (NC) state.

In a doorbell circuit, when the doorbell button is pressed, it completes the circuit and allows current to flow to the doorbell, causing it to ring. In the NC configuration, the button switch is always closed, and current flows through the circuit even when the button is not pressed. This can cause several problems, such as short circuits, overheating, and premature wear on the doorbell and other components in the circuit.

On the other hand, in the NO configuration, the button switch is open when it is not pressed, and no current flows through the circuit.

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3. How does gear work?


4. Are 3.73 or 4.10 gears better?

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3. Gears are wheels with teeth that slot together. When one gear is turned the other one turns as well. If the gears are of different sizes, they can be used to increase the power of a turning force. The smaller wheel turns more quickly but with less force, while the bigger one turns more slowly with more force.

4. 4.10 gears are going to accelerate faster and decelerate faster on the lift. However, the trade-off is greater fuel consumption per mile driven and higher engine speed per given road speed. In basic terms, the 4.10 gears will feel quicker and 3.73 will feel faster.

Your load voltage and arc voltage measurement should be

Answers

Answer:

taken at the same time to ensure accurate results.

Explanation:

taken at the same time for get results

Do you think the plan for the skyscraper in California is appropriate based on its location? Why or why not? Your answer should include at least three complete sentences.

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It is critical to note that building a high rise in California, especially within the San Francisco Inlet Zone, comes with its possess interesting set of challenges.

What is the skyscraper  about?

The range is inclined to seismic tremors and other common fiascos, making it vital to take after strict security rules amid development. In expansion, there are concerns almost the affect such a huge building would have on the nearby environment, as well as issues related to activity blockage and lodging accessibility.

Eventually, whether or not the arrange for the high rise is fitting will depend on a number of components, counting its plan, area, and affect on the encompassing community.

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PLEASE HELP QUICK!!
What balance do you believe should be maintained in deciding how land and its resources should be used? In what circumstances, and in what ways, do you believe environmental resources should always be preserved? In what circumstances, and how, do you believe they should be used? What guidelines would you suggest for striking the right balance?

Answers

The balance that I believe should be maintained in deciding how land and its resources should be used is adopting sustainable practices.

How to explain the information

The concept of sustainability calls for the practice of utilizing resources in a fashion that not just fulfills the requirements of presently, yet also preserves enough to support generations hereafter. This method of operation helps to guarantee that resources are being tapped rationally and applied responsibily all while preserving nature's equilibrium and environmental variety.

Particular ecosystems such as those found in wetlands, coral reefs, and woodlands hold significance in keeping up the overall health of the planet, and should take precedence in conservation efforts.

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The acronym ELF stands for which three important actions you must take to prepare for any standardized test?

a.Explore the test, learn the content, follow test day rules.

b.Explore the content, learn the test, follow test day rules.

c.Examine your courses, learn the facts, follow test day rules.

d.Examine the library, live the content, follow test day rules.

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I believe the answer is A, explore the test, learn the content, follow test day rules. Hope this helps! Please give me brainliest :)

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