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Alenkinab [10]
3 years ago
6

A flow of electric charge in a wire normally requires a _________.

Physics
1 answer:
just olya [345]3 years ago
6 0
Flow of electric charge in a wire requires " ELECTRONS "
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Which statement BEST describes how the body moves?
Alex73 [517]
<h3><u>Answer;</u></h3>

A. Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

<h3><u>Explanation</u>;</h3>
  • <em><u>Muscular tissues functions in movement and locomotion through its direct connection with the skeletal system. </u></em>
  • <em><u>Skeletal muscles are responsible for moving the body. The skeletal muscle contractions pull on tendons, which as attached to bones. When the skeletal muscle contraction causes the muscle to shorten, the bone and thus the body par will move. </u></em>
  • <em><u>Skeletal muscles also provide structural support for the entire body. </u></em>
7 0
3 years ago
Read 2 more answers
1. A large turbine has an initial angular momentum of 6700 kgm^2/s. A storm is rolling in and the wind picks up. 8 seconds later
LekaFEV [45]

Answer:

262.5 Nm

Explanation:

Torque is the rate of change of angular momentum.

Hence, we have

\tau = \dfrac{\Delta L}{t}

Δ<em>L</em> is the change in angular momentum.

Using values in the question,

\tau = \dfrac{8800-6700 \text{ kg m}^2\text{/s}}{8\text{ s}}  = 262.5 \text{ Nm}

4 0
3 years ago
How do you relate and explain a planet's distance from the Sun to things like the time of their year &amp; their average tempare
anzhelika [568]
What we call a "year" is the time a body takes to complete one orbital revolution
in its path around the sun.  The way gravity works, the farther a planet is from the
sun, the slower it moves, and the longer it takes to complete that trip.  So, farther
out from the sun means a longer "year".

Everybody knows that if you want to get more warmth, then you have to stand closer
to the fire, and it's the same with planets.  The farther a planet is from the sun, the less
heat it gets from the sun, and in most cases, that means its average temperature is
lower. (The planet's average temperature is affected by other things besides its distance
from the sun, such as how much heat comes up from inside, and how much heat its
atmosphere traps.)

The farther a planet's rotation axis is tilted from being perpendicular to the plane
of its orbit, the more seasonal variation there can be in the temperature at any one
place on its surface.  Of course, this is kind of irrelevant if the planet has no surface.
5 0
3 years ago
Which BEST describes what happens when light reaches opaque materials?
kati45 [8]

B) no light pass through

Explanation:

An opaque material is a material that does not allow light to pass through. Opaque materials are the most common materials, they do not allow light to pass through.

  • All opaque materials will cast shadows along their path when there is a screen.
  • Transparent materials allows light to pass through for example glasses.
  • Translucent materials allows light to go through partially.

Learn more:

Transmission of light brainly.com/question/8032392

#learnwithBrainly

 

4 0
3 years ago
Read 2 more answers
Two identically built microscopes are being used to characterize sub-micron features with two different laser sources. The first
Agata [3.3K]

Answer:

r_2\approx430\ nm

Explanation:

Given:

wavelength used by the first microscope, \lambda_1=632\times 10^{-9}\ m

resolving power of the first microscope, r_1=500\times 10^{-9}\ m

wavelength used by the second microscope, \lambda_2=543\times 10^{-9}\ m

For the microscopes the resolving power is given as:

r=1.22\times \frac{\lambda}{a}

where:

\lambda = wavelength of the laser source used

a= numerical aperture of the microscope

r= smallest feature that can be distinguished using the optical device

For the first microscope:

r_1=1.22\times \frac{\lambda_1}{a_1}

500\times 10^{-9}=1.22\times\frac{632\times 10^{-9}}{a_1}

a_1=1.54208

Since both the optical device are identically built we will have:

a_2=a_1=1.54208

Now for the second optical device:

r_2=1.22\times \frac{\lambda_2}{a_2}

r_2=1.22\times \frac{543\times 10^{-9}}{1.54208}

r_2\approx430\ nm

3 0
3 years ago
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