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4 years ago

12

true or false incident reports, such as situation reports and status reports enhance situational awareness and ensure that perso

nnel can access needed information.

1 answer:

Degger [83]4 years ago

4 0

True becauseidbajqkfkmxzmbakwlgof

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The following true stresses produce the corresponding true plastic strains for a brass alloy: True Stress (psi) True Strain 4930

Verizon [17]

Answer:

64640.92 psi

Explanation:

True stress ( psi ) True strain

49300 0.11

61300 0.21

<u>Determine the true stress necessary to produce a true plastic strain of 0.25</u>

бT1 = 49300

бT2 = 61300

бT3 = ?

∈T1 = 0.11

∈T2 = 0.21

∈T3 = 0.25

note : бTi = k ∈Ti^h

∴ 49300 = k ( 0.11 )^h ----- ( 1 )

61300 = k ( 0.21)^h ------ ( 2 )

solving equations 1 and 2 simultaneously

49300/61300 = ( 0.11 / 0.21 )^h

0.804 = (0.52 )^h

next step : apply logarithm

log ( 0.804 ) = log(0.52)^h

h = log 0.804 / log (0.52)

= 0.33

back to equation 1

49300 = k ( 0.11 )^0.33

k = 49300 / (0.11)^0.33

= 102138

therefore бT3 = K (0.25)^h

= 102138 ( 0.25 )^ 0.33

= 64640.92

5 0

3 years ago

A motorist enters a freeway at 25 mi/h and accelerates uniformly to 65 mi/h. From the odometer in the car, the motorist knows th

Helga [31]

Answer:

a) 2.2 m/s² b) 8 s

Explanation:

a) Assuming that the acceleration is constant, we can use any of the kinematic equations to solve the question.

As we don´t know the time needed to accelerate, we can use the following equation:

vf2 – vo2 = 2*a*∆x

At first, we can convert the values of vf, vo and ∆x, to SI units, as follows:

vf = 65 mi/h* (1,605 m / 1mi) * (1h/3,600 sec) = 29 m/s

vo = 25 mi/h *(1,605 m / 1mi) * (1h/3,600 sec) = 11.2 m/s

∆x = 0.1 mi*(1,605 m / 1mi) = 160.5 m

Replacing these values in (1), and solving for a, we have:

a = (29 m/s – 11.2 m/s) / 321 m = 2.2 m/s2

b) In order to obtain the time needed to reach to 65 mi/h, we can rearrange the equation for the definition of acceleration, as follows:

vf = vo + at

Replacing by the values already known for vo, vf and a, and solving for t, we get:

t = vf-vo /a = (29 m/s – 11.2 m/s) / 2.2 m/s = 8 sec

5 0

3 years ago

The tire marking for the temperature rating<br> indicates the tire is

torisob [31]

Answer:

There are three major UTQG rating systems used with tires. The tread wear rating indicates to the customer the tire's tread life. The traction rating measures the tire's ability to provide traction under wet conditions. The temperature rating indicates the tire's ability to produce and manage heat while driving.

Explanation:

3 0

4 years ago

What size discharge line ( pressure line ) would you select for a 20 gpm pump?

Alenkasestr [34]

Answer:

diameter= 1 in

Explanation:

Some authors have developed studies to find the recommended flow rate at the pump outlet, in order to avoid high pressure losses and cavitation.

Assuming that this pump carries water, the recommended speed is 2m / s, so knowing the flow rate = 20gpm we can find the diameter of the pipe.

Q=flow rate=20gpm=0.0012618m^3/s

V=speed=2m/s

A=Area

Q=VA

A=Q/V

$A=\frac{0.0012618m^3/s}{2m/s} =0.0006309m^2=630.2mm^2\\\\$

Taking into account that the flow is through a circular pipe we can use the equation to find the area of a circle, and then find the diameter

$A=\frac{\pi D^2 }{4} \\D=\sqrt[2]{\frac{4A}{\pi } } =\sqrt{\frac{4(630.8)}{\pi } } =23.34mm$

the result is 23.34mm, if we find the closest commercial diameter to this value, we find that it is 25.4mm = 1in

3 0

3 years ago

If an athlete can row at a rate of 50 m/min, how many days would it take to cross the Atlantic (≈3000 mi)?

lana [24]

The kinematics we can find the time to cross the Atlantic is 67 days.

The kinematics studies the movement of the body making relationships between the position, the speed and the acceleration of the same.

The average velocity is defined as the relation between the displacement between the time of the interval

v = $\frac{\Delta x}{t}$

Δt = $\frac{\Delta x}{v}$

Where v is the velocity, x the displacement t time

In this case they indicate the displacement is Δx = 3000 mi and the speed is v = 50 m / min

The system of units allow data to be exchanged with precision and safety, for this there is currently the international system of measurements (SI), where the unit of length is the meter and the unit of time is the second, let's reduce the magnitudes given to these units.

Δx = 3000 mi ( ) = 4.828 10⁶ m

v = 50 m / min ( ) = 0.833 m / s

Now we can calculate the time to cross the Atlantic

Δt = 4.828 10⁶ / 0.833

Δt = 5.796 10⁶ s

Let's reduce to days

Δt = 5.796 10⁶ s ( ) ( )

Δt = 67 days

In conclusion using kinematics we can find the result of the time to cross the Atlantic is 67 days.

Learn more about kinematics here: brainly.com/question/24984555

5 0

2 years ago