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3 years ago

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Identify the different engineering activities/steps in the engineering design process for each steps,summarize in 1–3 sentences

what happens during the step?

1 answer:

Gennadij [26K]3 years ago

5 0

Answer:

Hi how are you doing today Jasmine

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A ball A is thrown vertically upward from the top of a 24-m-high building with an initial velocity of 7 m/s . At the same instan

solniwko [45]

Answer:

The height from ground at which they pass each other is 22.656 m

The time at which they pass each other is 1.6 sec.

Explanation:

For ball A, we have:

height = (h)a

Initial Velocity = Vi = 7 m/s

g = - 9.8 m/s² (for upward motion)

Using 2nd eqn. of motion:

h = Vi t + (1/2)gt²

(h)a = 7t + (1/2)(-9.8)t²

(h)a = 7t - 4.9t²

this is the height of ball A with reference as the building. Taking ground as reference, we have to add the height of building, that is, 24 m.

(h)a = 7t - 4.9t² + 24 ______ eqn (1)

For ball B, we have:

height = (h)b

Initial Velocity = Vi = 22 m/s

g = - 9.8 m/s² (for upward motion)

Using 2nd eqn. of motion:

h = Vi t + (1/2)gt²

(h)b = 22t + (1/2)(-9.8)t²

(h)b = 22t - 4.9t² ______ eqn (2)

Now, when the too balls pass each other, there height must be same.

Therefore,

(h)a = (h)b

using eqn (1) and eqn (2):

7t - 4.9t² + 24 = 22t - 4.9t²

22t - 7t = 24

t = 24/15

<u>t = 1.6 sec</u>

Now, for the height, at which they pass each other put t = 6sec in eqn (2)

Therefore,

h = (22)(1.6) - (4.9)(1.6)²

h = 35.2 - 12.544

<u>h = 22.656 m</u>

<u></u>

6 0

4 years ago

In a tensile test on a steel specimen, true strain = 0.12 at a stress of 250 MPa. When true stress = 350 MPa, true strain = 0.26

scZoUnD [109]

Answer:

The strength coefficient is $625$ and the strain-hardening exponent is $0.435$

Explanation:

Given the true strain is 0.12 at 250 MPa stress.

Also, at 350 MPa the strain is 0.26.

We need to find $(K)$ and the $(n)$ .

$\sigma =K\epsilon^n$

We will plug the values in the formula.

$250=K\times (0.12)^n\\350=K\times (0.26)^n$

We will solve these equation.

$K=\frac{250}{(0.12)^n}$ plug this value in $350=K\times (0.26)^n$

$350=\frac{250}{(0.12)^n}\times (0.26)^n\\ \\\frac{350}{250}=\frac{(0.26)^n}{(0.12)^n}\\ \\1.4=(2.17)^n$

Taking a natural log both sides we get.

$ln(1.4)=ln(2.17)^n\\ln(1.4)=n\times ln(2.17)\\n=\frac{ln(1.4)}{ln(2.17)}\\ n=0.435$

Now, we will find value of $K$

$K=\frac{250}{(0.12)^n}$

$K=\frac{250}{(0.12)^{0.435}}\\ \\K=\frac{250}{0.40}\\\\K=625$

So, the strength coefficient is $625$ and the strain-hardening exponent is $0.435$ .

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3 years ago

4 grams of a saturated liquid are converted to a saturated vapor by being heated in a weighted piston–cylinder device arranged t

antiseptic1488 [7]

Answer:T2= 351.6k

Explanation:

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4 years ago

Explain working mechanism of safety valve.

ValentinkaMS [17]

Answer:

Safety valves are part of the safety features placed in the system to prevent the system from experiencing over pressures

Explanation:

A safety valve is a valve that is actuated automatically when the pressure on the inlet portion rises to a specified value to allow the outflow or discharge of fluid such as liquid, steam or gas out of the system to prevent the system pressure limit from being exceeded. The design of safety valves is such that the valve closes the emergency outlet port again once the system pressure returns to normal.

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3 years ago

Is santa real or nah is santa real or nah

Elena L [17]

Answer:

nah

Explanation:

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3 years ago

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