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A 1kg ball is dropped of a 20m tall bridge onto tarmac. The ball experiences 2N of drag throughout its motion. The ground has a coefficient of restitution of 0.5. What is the maximum height the ball will reach after one bounce

Energy GPE of the ball on the bridge: MGH = 1 * 9.81 * 20 =196 J energy lost to drag = F * D = 2 * 20 = 40 J Velocity of the ball just before impact =sqr(2*(196-40)/1) =17.66 m/s Velocity of the ball just af...
MD
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In ecology, what does the phrase 'carrying capacity' refer to and what factors may determine it?

Carry capacity refers to the maximum population size a species can reach in a particular environment.Important factors in determining carry capacity (among others):Food availabilityPredator population sizeSp...
JG
Answered by Jacob G. • Biology tutor
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How should I structure the coursework essay I have been set?

The easiest way to structure your coursework essay is through a rigid plan that you religiously stick to. Before you go to write the essay create an essay plan that runs through your argument by thematically...
DD
Answered by Daniel D. • History tutor
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A circuit with a voltage source of 18V, has 3 resistors all connected on parallel, values at 2ohms, 6ohms and 7.5ohms. Find the total circuit resistance, and then subsequently, the total current supplied and power dissipated in the curcuit.

The total resistance is found by the addition of resistors in parallel, in the equation (1/R T )=(1/R 1 )+(1/R 2 )+(1/R 3 ), therefore the total resistance is 1.25ohms. Therefore the current is simply I T =V...
HM
Answered by Harrison M. • Physics tutor
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30% of a population lacks the ability to taste the chemical PTC. Non-tasters are homozygouse recessive for this tasting gene. What percentage of the population are tasters and what percentage of the population are NOT heterozygous for this trait?

This question requires the knowledge of two equations from the Hardy-Weinberg Principle. p + q = 1 and p 2 + 2pq + q 2 = 1 where p = dominant allele, and q = recessive allele. Firstly we know from the questi...
FH
Answered by Fergal H. • Biology tutor
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