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alexandr402 [8]
3 years ago
8

.hjvhhchhvvgvfggghhjidaaawryui​

Physics
1 answer:
Naddik [55]3 years ago
5 0

Answer:

yes

Explanation:

i do agree

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True or False: pH is a measure of how acidic or basic a solution is.
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Answer:

Explanation:

True

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Which of the following choices defines energy in scientific terms?
snow_tiger [21]
1) B. Energy is the ability to do work

2) C. Energy is conserved, it just goes from one form to another.

3) Work = Force x displacement
= 300 x 100 = 30,000 Joules

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Which environmental change occurs quickly
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2 years ago
A 1 800-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.60 m before coming into contact
N76 [4]

Answer:

F = 614913.88 N

Explanation:

We are given;

Mass of pile driver; m = 1800 kg

Height of fall of pole driver; h = 4.6 m

Depth driven into beam; d = 13.6 cm = 0.136 m

Now, from energy equations and applying to this question, we can write that;

Workdone = Change in potential energy

Formula for workdone is; W = F × d

While the average potential energy here is; W = mg(h + d)

Thus;

Fd = mg(h + d)

Where F is the average force exerted by the beam on the pile driver while in bringing it to rest.

Making F the subject, we have;

F = mg(h + d)/d

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F = 614913.88 N

7 0
3 years ago
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