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OlgaM077 [116]
3 years ago
10

(Science)

Physics
2 answers:
FromTheMoon [43]3 years ago
7 0

Answer:

kinetic energy

Explanation:

because it is at the top going down

jek_recluse [69]3 years ago
5 0

Answer:

its d which is gravity

Explanation:

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Suppose a person pushes thumbtack that is 1/5 centimeter long into a bulletin board, and the force (in dynes) exerted when the d
mario62 [17]

Answer:

W = 290.7 dynes*cm

Explanation:

d = 1/5 cm = 0.2 cm

The force is in function of the depth x:

F(x) = 1000 * (1 + 2*x)^2

We can expand that as:

F(x) = 1000 * (1 + 4*x + 4x^2)

F(x) = 1000 + 4000*x + 4000*x^2

Work is defined as

W = F * d

Since we have non constant force we integrate

W = \int\limits^{0.2}_{0} {(1000 + 4000*x + 4000*x^2)} \, dx

W = [1000*x + 2000*x^2 + 1333*X^3] evaluated between 0 and 0.2

W = 1000*0.2 + 2000*0.2^2 + 1333*0.2^3 - 1000*0 - 2000*0^2 - 1333*0^3

W = 200 + 80 + 10.7 = 290.7 dynes*cm

3 0
3 years ago
What is the acceleration of the box?
worty [1.4K]

Answer:

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Explanation:

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The main difference between turbojets and rocket engines is the fact that
mafiozo [28]

Answer;

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3 years ago
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The radius of an atom can be measured directly?
Marrrta [24]
The radius of an atom can not be measured directly sir. So false
4 0
3 years ago
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