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Nutka1998 [239]

4 years ago

8

Open the Earth Science textbook to page 239 and summarize what “Wegener’s Hypothesis” is.

1 answer:

solniwko [45]4 years ago

7 0

Alfred Wegener first presented his hypothesis to the German Geological Society on 6 January 1912. His hypothesis was that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations.

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At what angle should the player aim the ball if it is thrown from a height of 8.5 ftft with a speed of 28 ft/sft/s?

pav-90 [236]

Answer:

θ = 56.09°

Explanation:

Given that

h = 8.5 ft

speed ,u= 28 ft/s

We know that acceleration due to gravity g

g= 32.2 ft/s²

The maximum height h is given as

$h=\dfrac{u^2sin^2\theta}{2g}$

Now by putting the values

$8.5=\dfrac{28^2sin^2\theta}{2\times 32.2}$

$sin^2\theta=0.69$

$sin\theta=0.83$

θ = 56.09°

Therefore the angle will be θ = 56.09°

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A boy Is it running with a kinetic energy of 810 J. If the boy has a mass of 80 kg what is his speed

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Answer:

10.125

Explanation:

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