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SpyIntel [72]
2 years ago
11

PLEASE HELLP ILL GIVE BrAINLY AND HEART

Physics
1 answer:
Pavlova-9 [17]2 years ago
3 0

Answer:

d

Explanation:

its not too deep my answer

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Explain why the types of technology valued can vary.
Elan Coil [88]
Over time, the types of technology can vary and be improved upon so that more advanced techniques become more valued. This could be the situation with mining whereby back in the 1500's in underground mines the rock was broken by fire setting ie lighting a fire below the rock face to heat up the rock and then throwing cold water on it to crack it, so that it could be dug by hand. With the advent of explosives, this all changed so that the rock could be blasted. The increase in advance rates for an underground heading have thus gone from 5-20 feet per month to up to 300meters (984 ft) per month for a 24/7 mining operation, which is a huge improvement.
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You want to slide a 0.39 kg book across a table. If the coefficient of kinetic friction is .21, what force is required to move t
uranmaximum [27]
Find the force that would be required in the absence of friction first, then calculate the force of friction and add them together.  This is done because the friction force is going to have to be compensated for.  We will need that much more force than we otherwise would to achieve the desired acceleration:

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The friction force will be given by the normal force times the coefficient of friction.  Here the normal force is just its weight, mg

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Now the total force required is:

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5 0
2 years ago
Thylakoids contain chlorophyl that absorb solar energy
steposvetlana [31]

Answer:

True

True statement:

Because pigment molecules absorb solar energy and thylakoids are pigment molecules

3 0
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The inner planets are different from the outer planets mainly because they are:.
amm1812

Answer:

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Explanation:

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