A muscle cell (fiber) in a biceps is 20cm long and contains 1500 myofibrils arranged parallel to each other. Each myofibril is made up of many sarcomeres, organized in series, that behave as springs. A relaxed sarcomere is 2μm long. When contracted, the cell shortens to half its length and develops a force of 30mN. Each of those structures, the cell, myofibril and sarcomere, can be modeled as a spring. a) Calculate the spring constant of a muscle cell.  b) The 1500 myofibrils in the muscle cell are arranged in parallel. Calculate the spring constant of a single myofibril.

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Chapter1: Units, Trigonometry. And Vectors
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can i please get help on this type of problem please. I would really apprecite it. i am having trouble with parts d-g. 

 A muscle cell (fiber) in a biceps is 20cm long and contains 1500 myofibrils arranged parallel to each other. Each myofibril is made up of many sarcomeres, organized in series, that behave as springs. A relaxed sarcomere is 2μm long. When contracted, the cell shortens to half its length and develops a force of 30mN. Each of those structures, the cell, myofibril and sarcomere, can be modeled as a spring.

a) Calculate the spring constant of a muscle cell. 

b) The 1500 myofibrils in the muscle cell are arranged in parallel. Calculate the spring constant of a single myofibril. 

c) The myofibrils are composed of sarcomeres that are arranged in series. Calculate the number of sarcomeres in each myofibril then calculate the spring constant of a single sarcomere. 

d) When we shiver in the cold, our muscles oscillate at a frequency of 10Hz and with an amplitude of 2cm. Assume a muscle is a simple harmonic oscillator and calculate the mass of the load on that oscillator.

e) Calculate the mass of the load on a single myofiber

f) Calculate the mass of the load on a single sarcomere.

g) How would the period change if the amplitude were increased or decreased?

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