3 years ago

Development is best described as:

Physics

1 answer:

Ede4ka [16]3 years ago

7 0

Answer:

A. Change that normally occurs in people throughout their lifetimes.

Explanation:

APEX verified

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A particle of charge of +3.40 ✕ 10−6 C is 17.5 cm distant from a second particle of charge of −2.00 ✕ 10−6 C. Calculate the magn

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Answer:

0.47 N

Explanation:

q1 = 3.4 x 10^-6 C

q2 = 2 x 10^-6 C

d = 17.5 cm = 0.175 m

The electrostatic force is given by

$F=\frac{Kq_{1}q_{2}}{d^{2}}$

$F=\frac{9\times10^{9}\times3.4\times 10^{-6}\times 2\times 10^{-6}}{0.175\times 0.175}$

F = 0.47 N

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3 years ago

A column of soldiers, marching at 114 steps per minute, keep in step with the beat of a drummer at the head of the column. It is

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Answer:

length of column is 140.42 m

Explanation:

in 1 min the soldiers travels 114 steps

so to complete 1 step the time taken by the soldiers =

t = $\dfrac{1\ min}{114}$

t = $\dfrac{60}{114}$

t = 0.526 s

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length of the column = v × t

= 343 m/s × 0.526 s

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hence the length of column is 140.42 m

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50 c should be right

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Number of protons equals the number of neutrons

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