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What's the difference between "Ser" and "Estar"?

Both verbs mean "to be" but the key difference is in the permanence of what they are describing. "Ser" is used when you're describing an essential characteristic of the person or thing, w...
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Answered by Emily H. • Spanish tutor
2894 Views

The friction coefficient of Formula 1 car tyres are around 1.7 in dry weather. Assuming sufficient power from the engine, calculate the theoretical best 0-100 km/h acceleration time in seconds. (neglect downforce, g=9.81m/s^2)

We have to appreciate the assumptions we are working with. The problem states that power is available infinitely, therefore the maximum acceleration influencing factor is the tire grip. It is reached when th...
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Answered by Balazs V. • Physics tutor
26787 Views

What is the equation of the normal line to the curve y = 3x^3 - 6x^2 at the point (1, 4)?

First we must find the gradient of the curve at the point (1, 4) - we do this by finding the derivative dy/dx, as we do to find any gradient. Differentiating the equation of the curve gives us that dy/dx = 9...
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Answered by Amy K. • Maths tutor
9229 Views

How do I figure out which case to use?

As an English speaker, a language that no longer uses cases, it can be really tricky to get to grips with the German case system. But once you start practising, you'll find it's not as horrible as you think!...
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Answered by Kate C. • German tutor
3772 Views

How do I start my essay in an exam?!

Take a deep breath. Look at the text you have to analyse or the texts you have to compare. Look at your question and begin to plan: take 5-10 minutes at the start of the exam to plan your answers (this will ...
LC
2883 Views