3 years ago

An average human has a heart rate of 70 beats per minute. If someone's heart

Physics

2 answers:

Sever21 [200]3 years ago

6 0

Answer:

I believe it would be D).3 x 10 to the 9th power

Explanation:

MariettaO [177]3 years ago

3 0

3x10 to the 9th power, the answer is D

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Can you make the work output of a machine greater than the work input?

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It is impossible to construct a machine which produces the work output greater than the work input.

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blagie [28]

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Betty (mass 40 kg), standing on slippery ice, catches her leaping dog (mass 15 kg) moving horizontally at 3.0 m/s. Show that the

MA_775_DIABLO [31]

Answer:

v = 2.18m/s

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In order to calculate the speed of Betty and her dog you take into account the law of momentum conservation. The total momentum before Betty catches her dog must be equal to the total momentum after.

Then you have:

$Mv_{1o}+mv_{2o}=(M+m)v$ (1)

M: mass Betty = 40kg

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v2o: initial speed of the dog = 0 m/s

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You solve the equation (1) for v:

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The speed fo both Betty and her dog is 2.18m/s

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