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3 years ago

Why are slow-twitch muscles more beneficial than fast-twitch muscles for cardiorespiratory fitness?

Physics

2 answers:

nata0808 [166]3 years ago

6 0

The answer is D. Slow-twitch muscles are able to use oxygen more efficiently than fast-twitch muscles.

Hope this helps

dlinn [17]3 years ago

4 0

Answer:D

Explanation: with fitness and running you normally run for longer distances the slow twitch mussels help with this by using less oxygen in a longer amount of time

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a number hope this helps

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The answer is 300 km

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Atoms are happy (they will not readily react with other elements) when they have a full outside ring of

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3 years ago

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a 5.0 kg ball is dropped from a 2.5 m high window. what is the velocity of the ball just before it hits the ground?

julsineya [31]

Answer:

Approximately $7.0\; \rm m \cdot s^{-1}$ .

Assumption: the ball dropped with no initial velocity, and that the air resistance on this ball is negligible.

Explanation:

Assume the air resistance on the ball is negligible. Because of gravity, the ball should accelerate downwards at a constant $g = 9.81 \; \rm m \cdot s^{-2}$ near the surface of the earth.

For an object that is accelerating constantly,

$v^2 - u^2 = 2\, a \, x$ ,

where

$u$ is the initial velocity of the object,
$v$ is the final velocity of the object.
$a$ is its acceleration, and
$x$ is its displacement.

In this case, $x$ is the same as the change in the ball's height: $x = 2.5\; \rm m$ . By assumption, this ball was dropped with no initial velocity. As a result, $u = 0$ . Since the ball is accelerating due to gravity, $a = 9.81\; \rm m \cdot s^{-2}$ .

$v^2 - u^2 = 2\, g \cdot h$ .

In this case, $v$ would be the velocity of the ball just before it hits the ground. Solve for

$v^2 = 2\, a\, x + u^2$ .

$\begin{aligned}v &= \sqrt{2\, a\, x + u^2} \\ &= \sqrt{2\times 9.81 \times 2.5 + 0} \\ &\approx 7.0\; \rm m\cdot s^{-1}\end{aligned}$ .

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3 years ago