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natita [175]
3 years ago
9

(1) Expansion of concrete

Physics
1 answer:
Pachacha [2.7K]3 years ago
6 0
Abcdefghijklmnopqurtuv
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What is magnetism? explaination​
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Magnetism is the force exerted by magnets when they attract or repel each other.

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A 62 kg box is lifted 12 meters off the ground. How much work was done?
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A wagon is accelerating down a hill. Which statement is true?
Ira Lisetskai [31]
Potential energy decreases and kinetic energy increases.

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3 0
3 years ago
Someone help please by providing work and answers please :)
Nastasia [14]
First we gotta use an equation of motion:

d = ut + \frac{1}{2} a {t}^{2}

Our vertical distance d= 100 m, initial vertical speed u = 0 m/s (because velocity is fully horizontal), and vertical acceleration a = 9.8 m/s2 because of gravity. Let's plug it all in!

100 = 0 + \frac{1}{2} (9.8) {t}^{2}

Now we just need to solve for t:

{t}^{2} = \frac{2(100)}{9.8} \\ \\ t = \sqrt{\frac{2(100)}{9.8}}

Hit the calculators, and you'll get 4.5 seconds!
5 0
3 years ago
Which states of matter have particles that move independently of one another with very little attraction
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The state of matter that the particles move independently of one another with very little attraction is, I believe, gas
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