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IRINA_888 [86]
3 years ago
12

a rocket can move thrpough outer space where no matter exists for it to push on because the rocket ejects gas molecules these ga

s molecules push agaisnt the rocket true or false
Physics
1 answer:
lubasha [3.4K]3 years ago
8 0

Answer: True.

Explanation:

Since the gases are given momentum as they are ejected by the rocket engine, a rocket moves in space. Consider the rocket in space as it rests. The device does not have any momentum. Next, it ignites the engine. As the exhaust gases go in one direction, to keep the overall momentum of the device steady, the rocket goes in the other. This shift in momentum of the gases gives the rocket the "push" to move forward. This push is what we call the thrust of the rocket.

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A charge of +1 coulomb is place at the 0 cm mark of a meter stick. A charge of +4 coulombs is placed at the 100 cm mark of the s
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As per the question the charge of one coulomb is at 0 cm of the metre stick.the second charge of 4 coulomb is situated at at 100 cm of metre stick.

hence the separation distance between them is 100 cm.

now as per the question a proton is set up  between them in such a way that the net force on it is zero

let the charge of proton is q coulomb let the proton is situated at distance of x cm from the charge 1 coulomb.hence it is situated at a distance of 100-x cm from the charge 4 coulomb.

the force exerted by 1 coulomb on proton is-\frac{1}{4\pi\epsilon} \frac{1*q}{x^2}

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\frac{1}{4\pi\epsilon} \frac{1*q}{x^2}=\frac{1}{4\pi\epsilon} \frac{4*q}{[100-x]^2}

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x^2=\frac{[100-x[^2}{4}[/tex[tex]x=\frac{100-x}{2}

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x=\frac{100}{3}

=33.33333cm   [ans]







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