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Darya [45]
3 years ago
6

Please help! How did Jessica Kusher create her new material?

Physics
2 answers:
zimovet [89]3 years ago
7 0

Answer:

she developed something to put on roofs to reduce the amount of ozone produced when heat hit the shingles

Explanation:

Arte-miy333 [17]3 years ago
7 0

Answer:

Explanation:

Jesseca Kusher, an 18-year-old researcher from Spartansburg, S.C., invented a paint-on coating for roofing shingles. Her formula could reduce a home's cooling costs and possibly cut ozone pollution in urban areas. ... One coating got graphite, the same material in pencil lead. Another recipe included gypsum

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For a block to move down an inclined plane what force has to be the greatest?
Hatshy [7]

Answer:

D) True. This is what creates the body weight

Explanation:

Let's write Newton's second law for this case. For inclined planes the reference system takes one axis parallel to the plane (x axis) and the other perpendicular to the plane (y axis)

X axis

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Y Axis

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With trigonometry we can find the components of weight

          sin θ = Wₓ / W

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From this expression as it indicates that the body is descending the force greater is the gravity that create the weight of the body

Let's examine the answers

A False This force does not apply because it is not a spring

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C) False. For there to be a rope, if it exists you should be less than the weight component for the block to lower

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3 years ago
Which quantities define momentum?
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Answer:

A. How much matter an object has, plus the magnitude and direction  of its motion

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where:

P = momentum Lineal [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Therefore the answer is A) How much matter an object has, plus the magnitude and direction  of its motion

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