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3 years ago

Heat is transferred from your body into an ice cube by

1 answer:

3 0

2.) <span>Heat is transferred from your body into an ice cube by "Conduction"

3.) </span><span>The loudness of a sound will be determined by the wave’s "Frequency"

4.) </span>The speed of a sound wave <span>"is slower than an electromagnetic wave"

Hope this helps!
</span>

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A 80kg astronaut is training in human centrifuge to prepare for a launch. The astronaut uses the centrifuge to practice having a

inessss [21]

The answers on the model of the human centrifuge ready for the launch to each question of the statement are listed below:

a) A force of 2479.210 newtons is acting on the astronaut's back.

b) A <em>net centripetal</em> force of 2479.210 newtons is acting on the astronaut.

c) The <em>centripetal</em> acceleration of the astronaut is 30.990 meters per square second.

d) The astronaut has a <em>linear</em> speed of approximately 19.284 meters per second.

e) The <em>angular</em> speed of the astronaut is 1.607 radians per second (15.346 revolutions per minute).

<h3>How to apply Newton's laws to analyze a process in a human centrifuge training</h3>

The human centrifuge experiments a <em>centripetal</em> acceleration when it reaches a <em>peak</em> angular speed. In this question we must apply Newton's laws of motion and concepts of <em>centripete</em> and <em>centrifugal</em> forces to answer the questions. Now we proceed to answer the questions:

<h3>How much force is acting on the astronaut's back?</h3>

By the third Newton's law the astronaut experiments a <em>rection</em> force (<em>F</em>), in newtons, which has the same magnitude to <em>centrifugal</em> force but opposed to that force. The magnitude of the force acting on the back of the astronaut is equal to:

$F = 3.16\cdot (80\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)$

$F = 2479.210\,N$

A force of 2479.210 newtons is acting on the astronaut's back. $\blacksquare$

<h3>What is the net centripetal force on the astronaut?</h3>

By the second and third Newton's laws we know that the <em>net centripetal</em> force on the astronaut is equal to the magnitude of the force found in the previous question. Thus, a <em>net centripetal</em> force of 2479.210 newtons is acting on the astronaut. $\blacksquare$

<h3>What is the astronaut's centripetal acceleration?</h3>

The centripetal acceleration of the astronaut (<em>a</em>), in meters per square second, is found by dividing the result of the previous question by the mass of the astronaut (<em>m</em>), in kilograms:

$a = \frac{F}{m}$ (1)

If we know that F = 2479.210 newtons and m = 80 kilograms, then the centripetal acceleration of the astronaut is:

$a = \frac{2479.210\,N}{80\,kg}$

$a = 30.990\,\frac{m}{s^{2}}$

The <em>centripetal</em> acceleration of the astronaut is 30.990 meters per square second. $\blacksquare$

<h3>What is the astronaut's linear speed?</h3>

By definition of <em>uniform circular</em> motion, we have the following formula for the <em>linear</em> velocity of the astronaut (<em>v</em>):

$v = \sqrt{a\cdot r}$ (1)

Where <em>r</em> is the radius of the human centrifuge, in meters.

If we know that $a = 30.990\,\frac{m}{s^{2}}$ and $r = 12\,m$ , then linear velocity of the astronaut is:

$v = \sqrt{\left(30.990\,\frac{m}{s^{2}} \right)\cdot (12\,m)}$

The astronaut has a <em>linear</em> speed of approximately 19.284 meters per second. $\blacksquare$

<h3>What is the astronaut's angular speed? </h3>

The <em>angular</em> speed of the astronaut (ω), in radians per second, is found by the following <em>kinematic</em> relationship:

$\omega = \frac{v}{R}$ (1)

If we know that <em>v ≈ 19.284 m/s</em> and <em>R = 12 m</em>, then the angular speed is:

$\omega = \frac{19.284\,\frac{m}{s} }{12\,m}$

The <em>angular</em> speed of the astronaut is 1.607 radians per second (15.346 revolutions per minute). $\blacksquare$

To learn more on centripetal forces, we kindly invite to check this verified question: brainly.com/question/11324711

6 0

2 years ago

How many planets are in our solar system? and how many moons are there in total?

Step2247 [10]

There are NINE planets in our solar system: Mars, Venus, Jupiter, Saturn, Uranus, Neptune, Earth, Mercury, Pluto.

As of this year, there are 350 moons in our solar system, 175 of which orbit about our planets.

I hope this helps!

5 0

4 years ago

Read 2 more answers

There are initially No nuclei in a radioactive source. After a time interval of three half-lives, what is the number of nuclei t

ladessa [460]

The number of nuclei that have decayed after three half-lives is 12.5% of the original mass.

<h3>What is half live of radioactive isotope?</h3>

The half life of a radioactive isotope is the time taken for the element to decay to half of its original mass.

<h3>Number of nuclei decayed after 3 half lives</h3>

N = N₀/(2³)

N = N₀/8

N = 0.125N₀

N = 12.5% of N₀

where;

N is n number of nuclei that have decayed after 3 half lives
N₀ is the original mass

Thus, the number of nuclei that have decayed after three half-lives is 12.5% of the original mass.

Learn more about half life here: brainly.com/question/10525285

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6 0

2 years ago

In most cases, letters of reconmendation are required for addmission to?

kykrilka [37]

Answer:

Get your recommenders to mention diverse achievements. ...

Help your recommenders with relevant info. ...

The letter should always include examples of things you did. ...

The letter should show how you improved over time. ...

The tone of the letter should not be too dry.

8 0

3 years ago

Plz AWNSER asap the awnser choices are <br> A point f<br> B point r<br> C point o<br> D point g

anzhelika [568]

Answer:

c point o

Explanation:

because h chair vhu hi hijih dv but by vhv

6 0

3 years ago

Read 2 more answers