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How do muscles contract and how is this controlled?

Skeletal muscle is composed of myofibrils. The myofibrils contain repeating units called sarcomeres. This also called the operational units. The sarcomeres contain actin filaments and myosin filaments. The a...
EK
Answered by Erika K. • Biology tutor
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Translate into Spanish: A spokesman said the project would include seventy wind turbines

Un portavoz dijo que el proyecto incluiría setenta molinos de viento.
SM
Answered by Silvia M. • Spanish tutor
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Derive 2*x^(3/2)+x+4

Will differentiate to 3*x^(1/2)+1. As you bring down the power and mulitply it my the coefficients, and take one off of the power for terms with x. And any constant differentiates to 0.
FW
Answered by Finnley W. • Maths tutor
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How do i remember the difference between differentiation and integration?

The easiest thing to do is to look at what is in the name. For integration you have `in`, which corresponds to an `increase` in power. Whereas with differenentiation you have `d` for decrease in power. Then ...
TM
Answered by Taha M. • Maths tutor
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The curve C has parametric equations x=2cos(t) and y=3cos(2t). Find and expression for dy/dx in terms of t.

Differentiate both equations given with respect to t. dx/dt = -2sin(t) dy/dt = -6sin(2t) dy/dx = (dy/dt) / (dx/dt) Sub your values in to get dy/dx = (3sin(2t))/sin(t)
SK
Answered by Sameerah K. • Maths tutor
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