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Use the idea of a thermos flask to explain conduction, convection and radiation. Comment also how a thermos flask can reduce heat loss.

Conduction is the transfer of heat caused by the collision of particles inside a substance and between substances. In order to reduce heat loss, some thermos flasks have a vacuum between the container of the...
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Answered by Felipe R. • Physics tutor
13400 Views

What is representative democracy, and can you give examples of it?

Representative democracy, also referred to as liberal democracy, refers to a democratic system where citizens elect politicians to make decisions for them on their behalf. Representative democracy differs fr...
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Answered by Jack S. • Politics tutor
17600 Views

Translate the following question in French : "He went to music class with his friend group."

Il est allé en cours de musique avec son groupe d'amis.
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Answered by Naomi E. • French tutor
2317 Views

Find the derivative with respect to x, of 5cos(x)+ 4sin(x)

f(x) = 5cos(x) + 4sin(x)to find f , (x) this is just another notation for the derivative.To differentiate trigonometry I always use this one simple trick which I will show on the white board better sin cos -...
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Answered by Ryan P. • Maths tutor
4777 Views

How do you approach a primary source analysis?

There are several key things you need to factor into a primary source analysis. These are provenance, purpose and subject knowledge. Provenance relates primarily to the origins of the source. For example, yo...
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Answered by Eleanor B. • History tutor
2569 Views