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What is the First Law of Thermodynamics?

The First Law of Thermodynamics is that energy cannot be created or destroyed, it can only change from one form to another. For example, a boulder perched at the top of a hill has gravitational potential ene...
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Answered by Jade D. Chemistry tutor
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Express 1/(1+2x)(1-x) in partial fractions

1/(1+2x)(1-x)=(A/(1+2x))+(B/(1-x))1=A(1-x)+B(1+2x) Now set the bracket of one of A or B equal to 0 to get an equation with 1 unknown.Set x=11=A(1-1)+B(1+2(1))1=A(0)+B(3)1=3BB=1/3Set x=-(1/2)1=A(1-(-1/2))+B(1...
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Answered by Luke C. Maths tutor
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Solve the simultaneous equations: 3x + y = -4 and 3x - 4y = 6

First subtract the first equation from the second getting:0 - 5y = 10-5y = 10Then divide both sides by (-5)y = -2Then substitute the y value of (-2) back into the first equation giving:3x + (-2) = -43x = -2x...
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Answered by Luke C. Maths tutor
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How do you find a turning point of a function using differentiation?

To find the location of turning points on a function, find the first derivative of the function, and then set the result to 0. if you then solve this equation, you will find the locations of the turning poin...
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Answered by Nathan S. Maths tutor
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How would you calculate the moment of a Force on a rigid object?

You would calculate the moment of a force on a object by first finding the distance of the force from the pivot point of the object. Following this, you would find the component of the force perpendicular to...
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Answered by Nathan S. Physics tutor
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