3 years ago

Using a streak test on a mineral that is harder than 7 on Mohs scale would not be very useful True or False

Physics

1 answer:

aliya0001 [1]3 years ago

8 0

Answer: True true false true

Explanation:

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Action and reaction force always cancel each other. <br><br> True or False.

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False. They have same magnitude and opposite direction but they never cancel as each of them does the action on the other body, and for the forces to cancel out they need to act ob the same body.

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When point charges q = +8.4 uC and q2 = +5.6 uC are brought near each other, each experiences a repulsive force of magnitude 0.6

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Answer:

it is separated by 80 cm distance

Explanation:

As per Coulombs law we know that force between two point charges is given by

$F = \frac{kq_1q_2}{r^2}$

here we know that

$q_1 = +8.4\mu C$

$q_2 = +5.6 \mu C$

force between two charges is given as

$F = 0.66 N$

now we have

$F = \frac{kq_1q_2}{r^2}$

$0.66 = \frac{(9\times 10^9)(8.4 \mu C)(5.6 \mu C)}{r^2}$

$r = 0.8 m$

so it is separated by 80 cm distance

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Irreversible damage to the liver due to long term alcohol abuse is called:

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The statements that apply in this case are:

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