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elena-14-01-66 [18.8K]
2 years ago
6

Which type of irb review does not require an irb approval but does require a determination by the irb or an irb designee?

Physics
1 answer:
Westkost [7]2 years ago
4 0

Answer:

For this case the answer would be exampt. Since this is the only level that require a determination by the irb or an irb designee.

Explanation:

Previous concepts

We have 3 levels of the IRB review from the lowest to the highest:

Exempt. For thi slevel we have less than the minimal risk. And we have some examples like a survey with anonymous participants. And not classifed info. Other examples are: (Education research,  Surveys, interviews, educational tests, public observations (that do not involve children) ,Benign behavioral interventions ,Analysis of previously-collected, identifiable info/specimens ,Federal research/demonstration projects ,Taste and food evaluation studies).

Expedited. For this level we have more risk than th exempt level. An example would be analyze some info for non reasearch pruposes, but we can identify the subjects of the study. Other examples are :(Clinical studies of drugs and medical devices only when certain conditions are met , Collection of blood samples by finger stick, heel stick, ear stick, or venipuncture in certain populations and within certain amounts , Prospective collection of biological specimens for research purposes by noninvasive means , Research involving materials (data, documents, records, or specimens) that have been collected, or will be collected solely for non-research purposes , Collection of data from voice, video, digital, or image recordings made for research purposes )

Full board. That's the level with the maximum risk. Have included the identification of the subjects and the desire variable analyzed.

For our question:

Which type of irb review does not require an irb approval but does require a determination by the irb or an irb designee?

For this case the answer would be exampt. Since this is the only level that require a determination by the irb or an irb designee.

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The space shuttle releases a satellite into a circular orbit 630 km above the Earth.
solniwko [45]

Answer:

7,539 m/s

Explanation:

Let's use this equation to find the gravitational acceleration of this space shuttle:

  • \displaystyle g=\frac{GM}{r^2}

We know that G is the gravitational constant: 6.67 * 10^(-11) Nm²/kg².

M is the mass of the planet, which is Earth in this case: 5.972 * 10^24 kg.

r is the distance from the center of Earth to the space shuttle: radius of Earth (6.3781 * 10^6 m) + distance above the Earth (630 km → 630,000 m).

Plug these values into the equation:

  • \displaystyle g=\frac{(6.67\cdot 10^-^1^1 \ Nm^2kg^-^2)(5.972\cdot 10^2^4 \ kg)}{[(6.3781\cdot 10^6 \ m)+(630000 \ m)]^2}

Remove units to make the equation easier to read.

  • \displaystyle g=\frac{(6.67\cdot 10^-^1^1 )(5.972\cdot 10^2^4 )}{[(6.3781\cdot 10^6)+(630000 )]^2}

Multiply the numerator out.

  • \displaystyle g=\frac{(3.983324\cdot 10^1^4)}{[(6.3781\cdot 10^6)+(630000 )]^2}

Add the terms in the denominator.

  • \displaystyle g=\frac{(3.983324\cdot 10^1^4)}{[(7008100)]^2}

Simplify this equation.

  • \displaystyle g=8.11045189 \ \frac{m}{s^2}

The acceleration due to gravity g = 8.11045189 m/s². Now we use the equation for acceleration for an object in circular motion which contains v and r.

  • \displaystyle a = \frac{v^2}{r}

a = g, v is the velocity that the space shuttle should be moving (what we are trying to solve for), and r is the radius we had in the previous equation when solving for g.

Plug these values into the equation and solve for v.

  • \displaystyle 8.11045189 \ \frac{m}{s^2}  = \frac{v^2}{7008100 \ m}  

Remove units to make the equation easier to read.

  • \displaystyle 8.11045189   = \frac{v^2}{7008100}

Multiply both sides by 7,008,100.

  • 56838857.89=v^2

Take the square root of both sides.

  • v=7539.154985

The shuttle should be moving at a velocity of about 7,539 m/s when it is released into the circular orbit above Earth.

5 0
2 years ago
A NATO base in northern Norway is warmed with a heat pump that uses 7.0 °C ocean water as the cold reservoir. Heat extracted fro
tatiyna

Answer:

3.33, 4.84

Explanation:

A) Actual coefficient of performance can be calculated by the formula stated below

Actual COP = heat delivered/ work required

Actual COP = 2,000/600

Actual COP = 3.33

B) Th = High temperature = 80°C + 273 = 353K

Tl = Low temperature = 7°C + 273 = 280K

The theoretical maximum coefficient of performance can ve calculated by the formula

Theoretical COP = Th/(Th-Tl)

Theoretical COP = 353/(353-280)

Theoretical COP = 353/73

Theoretical COP = 4.84

3 0
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Answer:

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A 1600kg cannon fires a 5kg cannonball horizontally. The exit velocity of the cannonball is 80m/s and the barrel length is 2m. W
evablogger [386]

Answer:

 a = 1600 m / s²

Explanation:

For this exercise we use the kinematics relations,

         v² = v₀² + 2 a x

where v₀ is the initial velocity of the bullet, which as part of rest is zero, for the distance (x) we can assume that the gases accelerate along the entire trajectory of the cannon x = 2m

         a = \frac{v^2}{2x}

let's calculate

         a = \frac{80^2}{2 \ 2}

         a = 1600 m / s²

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Whatever the statement is, I know one thing for sure:  It's NOT included on the list of choices that you've provided.

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