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Scorpion4ik [409]
3 years ago
9

Why do satellites launched into low-Earth orbits not remain there indefinitely

Physics
1 answer:
-BARSIC- [3]3 years ago
4 0

The only way to remain in orbit indefinitely is to make sure that no part of the orbit passes through any air molecules. There are too many of those in a low earth orbit. So a low earth orbit gradually loses energy when the satellite hits air molecules.

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Which processes result in the release of carbon? Select three options.
viktelen [127]

Answer:

The remains of producers are broken down by decomposers.

The remains of consumers are broken down by soil decomposers.

Animals break down food molecules to obtain energy.

Explanation:

7 0
3 years ago
An electron is moving at a speed of 4.8 × 10 6 m/s at an angle of 30.0° with respect to a uniform magnetic field of 9.2 × 10 –4
omeli [17]

Answer:

r = 5.94 10⁻² m

Explanation:

The magnetic force is given by the ratio

        F =q v x B

The bold indicate vectors and the vector product determines that the force is perpendicular to the other two vectors, so the modulus of the velocity does not change, but its direction, therefore the acceleration in Newton's second law is centripetal

         F = m a

   

The magnitude of the force is

      F = q v B sin θ

The centripetal acceleration is

      a = v² / r

Let's replace

       q v B sin θ = m v² / r

       r = m v / (q B sin θ)

Let's calculate

      r = 9.11 10⁻³¹  4.8 10⁶ / (1.60 10⁻¹⁹  9.2 10⁻⁴ sin 30)

     r = 5.94 10⁻² m

6 0
3 years ago
A cave diver enters a long underwater tunnel. When her displacement with respect to the entry point is 20 m, she accidentally dr
Sladkaya [172]

Answer:

displacement vector is -16i

Explanation:

Given data:

Displacement relative to entry of tunnel is 20 m

Distance from entry of tunnel at which she notice about camera missing is 6 m

swim distance is 10 m

total distance from entry of tunnel after she swin back is 20+ 6 = 26 m

After covering 10 m to find a camera she will be at 26 -10 = 16 m

If direction out from tunnel is taken as positive  then her displacement vector with respect to entry of tunnel is - 16i

where i is unit positive vector.

7 0
3 years ago
Analogue signals transmit information for such things as _____________.
ivann1987 [24]

Transmission of information in ANY form can be done digitally
or analoguely.

Beginning about 30 years ago, everything slowly started changing
to digital.  Today, all commercial satellite communication, all optical
fiber communication, all internet communication, all computer
communication, all commercial cable communication, all commercial
television, and much of the telephone system, are all digital. 

On your computer ... .pdf,  .jpg, .mp3  etc.  are all digital methods of
moving and storing information.

AM and FM radio are an interesting subject.  They're all still analog.
They could easily be changed to all digital, and it would be a big
improvement, both for the broadcasters and for the listeners. 
BUT ... every AM and FM radio that anybody has now would be
obsolete.   Every single radio would either need to be replaced,
OR you'd need to add a digital decoder to every radio, like we
had to do with our TV sets a few years ago when television
suddenly became all digital.  With AM and FM radios, the decoders
would be bigger, and would cost more, than most of the radios.

And that's why commercial radio broadcasting is still analog.
 
7 0
3 years ago
Read 2 more answers
One kilogram of the explosive TNT supplies explosive energy of about 4.2×10^6 J. Let's see what that energy can achieve in lifti
makkiz [27]

Answer:

4,0000

Explanation:

3 0
3 years ago
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