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3 years ago

Which of the following statements best describes ergonomics?

Physics

2 answers:

Romashka-Z-Leto [24]3 years ago

6 0

Ergonomics involves the study of the human body.

Ergonomics is the science of adjusting environments, tasks, or procedures to fit you, the healthcare worker.

Ergonomics is the study of human psychology.

Ergonomics is the science of adjusting you, the healthcare worker, to fit the environment, tasks, or procedures.

emmainna [20.7K]3 years ago

3 0

Can you provide the multiple choices ?

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If a loaded truck that accelerates at 1 meter per second squared loses its load and has three-fourths of the origional mass, wha

Nina [5.8K]

I believe it'd accelerate at 1.25 m/s^2 instead of 1, as it lost 1/4 of its mass (.25), so now it is .25 of 1 faster.

8 0

3 years ago

Find the values of the root mean square translational speed v, molecules in gaseous diatomic oxygen (O2), gaseous carbon dioxide

tiny-mole [99]

Answer:

For diatomic oxygen:V=539.06 m/s

For carbon dia oxide:V=459.71 m/s

For dia atomic hydrogen:V=2156.25 m/s

Explanation:

As we know that

Root mean square velocity V

$V=\sqrt{\dfrac{3RT}{M}}$

Where

R is the gas constant

$R=8.31\ \frac{kg.m^2}{s^2.mol.K}$

T is the temperature (K).

M is the molecular weight.

For diatomic oxygen:

M=32 g/mol

T=273+100 = 373 K

$R=8.31\ \frac{kg.m^2}{s^2.mol.K}$

$V=\sqrt{\dfrac{3RT}{M}}$

$V=\sqrt{\dfrac{3\times 8.31\times 373}{32\times 10^{-3}}}$

V=539.06 m/s

For carbon dia oxide

M=44 g/mol

T=273+100 = 373 K

$R=8.31\ \frac{kg.m^2}{s^2.mol.K}$

$V=\sqrt{\dfrac{3RT}{M}}$

$V=\sqrt{\dfrac{3\times 8.31\times 373}{44\times 10^{-3}}}$

V=459.71 m/s

For dia atomic hydrogen:

M= 2 g/mol

T=273+100 = 373 K

$R=8.31\ \frac{kg.m^2}{s^2.mol.K}$

$V=\sqrt{\dfrac{3RT}{M}}$

$V=\sqrt{\dfrac{3\times 8.31\times 373}{2\times 10^{-3}}}$

V=2156.25 m/s

3 0

4 years ago

The lowest-pitch tone to resonate in a pipe of length l that is closed at one end and open at the other end is 200 hz. Which fre

Natali [406]

Answer:

The frequency 400 hz is not possible .

Explanation:

Given that,

Frequency = 200 hz

Length = l

Suppose, The given frequencies are,

600 Hz, 1000 Hz, 1400 Hz, 1800 Hz and 400 hz.

The possible resonance frequencies are

We need to calculate the fundamental frequency

Using formula of fundamental frequency for pipe

$F=\dfrac{nv}{4L}$

Where, n = odd number

Put the value of frequency

$200= \dfrac{nv}{4L}$

We need to calculate the first over tone

Using formula of fundamental frequency

n = 3,

$F=\dfrac{nv}{4L}$

Put the value into the formula

$F_{2}=3\times\dfrac{v}{4l}$

$F_{2}=3\times200$

$F_{2}=600\ Hz$

We need to calculate the second over tone

Using formula of fundamental frequency

n = 5,

$F=\dfrac{nv}{4L}$

Put the value into the formula

$F_{3}=5\times200$

$F_{3}=1000\ Hz$

We need to calculate the third over tone

Using formula of fundamental frequency

n = 7,

$F=\dfrac{nv}{4L}$

Put the value into the formula

$F_{4}=7\times200$

$F_{4}=1400\ Hz$

We need to calculate the fourth over tone

Using formula of fundamental frequency

n = 9,

$F=\dfrac{nv}{4L}$

Put the value into the formula

$F_{5}=9\times200$

$F_{5}=1800\ Hz$

Hence, The frequency 400 hz is not possible .

8 0

3 years ago

Which of the following happens to

STatiana [176]

Explanation:

As pressure increases, with temperature constant, density increases. Conversely when temperature increases, with pressure constant, density decreases. Air density will decrease by about 1% for a decrease of 10 hPa in pressure or 3 °C increase in temperature.

4 0

3 years ago

What is the phase difference between the oscillation of the electric field and the oscillation of the magnetic field?

love history [14]

Answer: Zero

Explanation:

In electromagnetic wave, the magnetic and electric field are perpendicular to each other as well as perpendicular to the propagation wave. Both are always in a phase.

When the electric field is minimum, the magnetic field is also minimum and when the magnetic field is maximum, the electric field is also maximum. They are both in the same phase. Therefore, the phase difference between the oscillation of the electric field and that of the magnetic field is zero.

5 0

4 years ago