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A rollercoaster stops at a point with GPE of 10kJ and then travels down a frictionless slope reaching a speed of 10 m/s at ground level. After this, what length of horizontal track (friction coefficient = 0.5) is needed to bring the rollercoaster to rest?

Recognise that the intial potential energy and kinetic energy at 10 m/s position should be identical due to the frictionless slope.

mgh = 0.5mv²

Answered by Daniel M. • Maths tutor

4387 Views

Please can you explain E/Z isomers?

1. Assign priority to the four groups attached to the double bond, by adding up their atomic numbers.

2. Work out which are the two highest priority (highest atomic number) - one on each ...

Answered by Jonathan B. • Chemistry tutor

3251 Views

How should I approach my extended project?

- Get started as early as possible- As soon as you have a potential topic, start researching and gathering information!

-Make sure to attend me...

Answered by Helen C. • Extended Project Qualification tutor

6772 Views

How can bacteria become resistant to antibiotics and how can doctors reduce the number of bacteria that become resistant?
-A mutation in a pathogen may produce a new strain. This new strain may become resistant to an antibiotic through natural selection. The new strain ma...
HC
Answered by Helen C. • Biology tutor
15205 Views

Using the Hardy Weinberg principle, calculate the frequency of the heterozygous genotype in the population if the frequency of the dominant allele p is 0.864. Express your answer as a percentage of the population.
p²+ 2pq + q²= 1.0

p + q = 1.0

1.0 - p = q

1.0 - 0.864 = 0.136

q = 0.136
...
HC
Answered by Helen C. • Biology tutor
7900 Views

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A rollercoaster stops at a point with GPE of 10kJ and then travels down a frictionless slope reaching a speed of 10 m/s at ground level. After this, what length of horizontal track (friction coefficient = 0.5) is needed to bring the rollercoaster to rest?

Please can you explain E/Z isomers?

How should I approach my extended project?

How can bacteria become resistant to antibiotics and how can doctors reduce the number of bacteria that become resistant?

Using the Hardy Weinberg principle, calculate the frequency of the heterozygous genotype in the population if the frequency of the dominant allele p is 0.864. Express your answer as a percentage of the population.

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