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o-na [289]
3 years ago
11

What are the uses of rockets ​

Physics
1 answer:
lora16 [44]3 years ago
8 0

They are used to be able to go out of Earth and into space to Be able to explore and toBe able to prove and tell about Earth and space

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Which is a correct example of the principle of conservation of momentum? A) reversing of a car at a dead end B) conversion of ra
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I think the answer would be D.
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Need help anybody thanks
mars1129 [50]
If there are no windows, then the illumination in the room depends
only on the room and what's in it, not on anything outside. 
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Why would a flat sheet of paper and a wad of paper not fall through the air at the same rate
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The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons orbit the magnetic field at
Rama09 [41]

Answer:

<em>The magnetic field is 0.0857 T.</em>

Explanation:

The electrons orbit the magnetic field with a centripetal force equal to

F = \frac{mv^{2} }{r}

also, the force on an electron in a magnetic field is gotten as

F = Bqv

equating this two equations give

\frac{mv^{2} }{r} = Bqv

mv/r = Bq

where m is the mass of the electron = 9.11 x 10^-31 kg

v is the the linear speed of the electron

B is the magnetic field on the electron

r is the radius of the orbital movement

q is the charge on an electron = 1.602 x 10^-19 C

but, the linear speed v = ωr

where ω is the angular speed of the electron

substituting into equation above, we have

mωr/r = Bq

which reduces to

mω = Bq

finally, w know that the angular speed is related to the frequency of the electron by

ω = 2πf

we then finally have

2mπf = Bq

where f is the frequency emitted by the electron = 2.4 GHz = 2.4 x 10^9 Hz

substituting values into the equation, we have

2 x 9.11 x 10^-31 x 3.142 x 2.4 x 10^9 = B x 1.602 x 10^-19

B = (1.3734 x 10^-20)/(1.602 x 10^-19) = <em>0.0857 T</em>

= <em>85.7 mT</em>

7 0
3 years ago
On a far-away (hypothetical) planet, a student is conducting an experiment to study vertical motion. The student fires a cannon
IgorC [24]
Yeah it’s pretty much positive
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2 years ago
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