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How does heart muscle contract rhythmically in unison?

The heart is composed of a specialied muscle type called cardiac muscle. This has unique properties such that each muscle cell is connected together by gap junctions in their cell membranes (electrical sy...

JC
Answered by Jonathan C. • Biology tutor
5854 Views

Integrate x*ln(x)

Let u = ln(x) and dv/dx = x

Thus du/dx = 1/x and v = x2/2

Using the formula:

Integral of udv/dx = uv - Integral of v*du/dx<...

AG
Answered by Anindita G. • Maths tutor
4352 Views

A projectile is fired out of a cannon at 50 km/s, at an angle of 30 degrees and an elevation of 10m from the ground. How long does it take for the projectile to hit the ground?

Find the verticle velocity by resolving the velocity vector:

Trigonometry: 50sin30 = 25m/s in upwards direction

Using SUVAT for the vertical direction: S=-10, U=25, A=-9.81, V=N/A, T=?:

...
LC
Answered by Lewis C. • Physics tutor
2049 Views

What is the % yield if 12g of magnesium is dissolved in hydrochloric acid to produce 20g of magnesium chloride?

Differentiate the function f(x) = 2x^3 + (cos(x))^2 + e^x

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