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Vikki [24]
3 years ago
15

Where are rifts and ridges located at?

Physics
1 answer:
VLD [36.1K]3 years ago
8 0
Like the ones on mountains?
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a. Picture attached

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d. It makes sense cosidering that a normal heart beat rate is between 60 and 100 beats per minute (bpm).

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First we have to identify the unknown of this problem:

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Considering the characteristics of the problem and that distance and velocity are specified, the acceleration is constant, for that reason we use the equations of uniformly accelerated motion as follows:

v=v_{0}+at\\ x=x_{0}+ v_{0}+\frac{1}{2}at^{2}

If we reorganize the equations, considering that x_{0} and v_{0} are zero because motion starts from rest , we have:

a=\frac{v}{t} \\x=\frac{1}{2}at^{2}  =\frac{1}{2}\frac{v}{t} t^{2}=\frac{1}{2} vt\\t=\frac{2x}{v} \\t=\frac{2*1.80cm}{30.0\frac{cm}{s} } \\t=0.12 s

Finally, the analysis of the result leaves us to understand why the normal heart beat rate varies between 60 and 100 bpm.

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