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dem82 [27]
3 years ago
10

Pls help I will mark brainliest

Physics
2 answers:
earnstyle [38]3 years ago
7 0
It will be unstable system because it will not be able to recover from the disturbance
anzhelika [568]3 years ago
5 0

8). first choice choice

9). 7.0 ohms

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Batman chased the joker on his batbike for 20 minutes, traveling at the speed of 30 kilometers per minute. How far did Batman go
AURORKA [14]

Answer:

123 kilometer

Explanation:

none

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3 years ago
Which occurrence demonstrates dispersion?
katrin2010 [14]
A rainbow. Dispersion is the splitting of radiation into it's different wavelengths.
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3 years ago
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How many charges are required to have an electric field
Liono4ka [1.6K]
One charge is enough in order to have an electric field. 

In fact, every charge generates an electric field: for example, the electric field generated by a single point positive charge is radial, as shown in the attached figure. More complicate electric field configurations can be obtained adding charges or using more complicate charge distributions, but one charge is enough to have an electric field.


7 0
3 years ago
Determine the radial acceleration of the ultracentrifuge using calculations
Dmitry [639]

When something moves on a round track, the guidance of the something's velocity must continually switch. A switching velocity means that there must be an acceleration. This acceleration is horizontal to the guidance of the velocity. This is said as “the radial acceleration”, or “centripetal acceleration” ("centripetal" means "center searching"). The “radial acceleration” is equal to “the square of the velocity”, divided by “the radius of the circular path of the object”. The unit of the “centripetal acceleration” is m/s².

\text { Centripetal acceleration }=\frac{\text {velocity}^{2}}{\text {radius of motion}}

\mathrm{a}_{\mathrm{rad}}=\frac{V^{2}}{r}

where,

\text { and }=\text { radial, or centripetal, acceleration }(\mathrm{m} / \mathrm{s} ^2)

"v" = "velocity" (m/s) and "r" = "radius of motion of the object" (m)

3 0
3 years ago
a spherical mirror produces a magnification of -1 on a screen placed at a distance of 40cm from the mirror i) write the type of
Darya [45]

Answer:

f =-20 cm

Explanation:

Given that,

The magnification of a spherical mirror, m = -1

The image distance, v = 40 cm (for negative magnification)

The magnification of a concave mirror is negative. The mirror showing -1 magnification is a concave mirror.

Let f be the focal length of the mirror. We know that,

m=\dfrac{-v}{u}\\\\-1=\dfrac{-v}{u}\\\\v=u

Object distance, u = -40 cm

Using mirror's formula i.e.

\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}\\\\f=\dfrac{1}{\dfrac{1}{-40}+\dfrac{1}{-40}}\\\\f=-20\ cm

So, the focal length of the mirror is 20 cm.

8 0
3 years ago
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