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3 years ago

He is best known for publishing an almanac based on my astronomical calculations. Who is it?

Physics

1 answer:

slega [8]3 years ago

5 0

Benjamin Banneker did this in 1792. Hope this helps

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What is the name of the process in which oceanic crust moves apart at mid-ocean ridges due to convention currents in the mantle?

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The answer is D seafloor spreading

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2 years ago

The elastic energy stored in your tendons can contribute up to 35 % of your energy needs when running. Sports scientists have st

irina [24]

Complete Question:

The elastic energy stored in your tendons can contribute up to 35 % of your energy needs when running. Sports scientists have studied the change in length of the knee extensor tendon in sprinters and nonathletes. They find (on average) that the sprinters' tendons stretch 43 mm , while nonathletes' stretch only 32 mm . The spring constant for the tendon is the same for both groups, $31 {\rm {N}/{mm}}$ . What is the difference in maximum stored energy between the sprinters and the nonathlethes?

Answer:

$\triangle E = 12.79 J$

Explanation:

Sprinters' tendons stretch, $x_s = 43 mm = 0.043 m$

Non athletes' stretch, $x_n = 32 mm = 0.032 m$

Spring constant for the two groups, k = 31 N/mm = 3100 N/m

Maximum Energy stored in the sprinter, $E_s = 0.5kx_s^2$

Maximum energy stored in the non athletes, $E_m = 0.5kx_n^2$

Difference in maximum stored energy between the sprinters and the non-athlethes:

$\triangle E = E_s - E_n = 0.5k(x_s^2 - x_n^2)\\\triangle E = 0.5*3100* (0.043^2 - 0.032^2)\\\triangle E = 0.5*31000*0.000825\\\triangle E = 12.79 J$

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3 years ago

A physicist found that a force of 1.32 N was measured between two charged spheres. The distance between the spheres was 95 cm. C

labwork [276]

The electric force (and the gravitational force too) is inversely proportional
to the square of the distance between the objects involved.

In this question, the distance is increased by a factor of (1.25/0.95) .

So the electric force will change by the factor of (0.95/1.25)² .

The new force is

(1.32 N) · (0.95/1.25)² = 0.762... newton (rounded)

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2 years ago

Which of the following processes can produce either rain or snow

umka21 [38]

Bergeron–Findeisen Process.

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3 years ago

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Someone answer these questions please???

chubhunter [2.5K]

Yeah sure someone else in answering rn

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2 years ago

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