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horrorfan [7]
3 years ago
10

A car accelerates from rest (zero speed) up to a speed of 30m/s in 12

Physics
1 answer:
il63 [147K]3 years ago
7 0

Answer:

Explanation:

v=u+at

30=0+a×12

30=12a

a=\frac{30}{12}

a=2.5ms⁻²

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The density of mobile electrons in copper metal is 8.4 1028 m-3. Suppose that i = 4.6 1018 electrons/s are drifting through a co
Vesna [10]

Answer:

The time is 106.7 minute.

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Put the value into the formula

v_{d}=\dfrac{4.6\times10^{18}}{8.4\times10^{28}\times\pi\times(0.6\times10^{-3})^2}

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7 0
3 years ago
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