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GCSE

How do I work out the efficiency of a process from a Sankey diagram?

The formula for efficiency is:

efficiency = (useful energy / total energy)

Therefore, first we must find the total energy which is the sum of all of the branches of the Sank...

KR
Answered by Katherine R. Physics tutor
25818 Views

How do we know about the structure of the atom?

Scientists originally thought that atoms were like a 'plum pudding' in that they were a sphere of positive charge with negatively charged electrons scattered about inside it. This was because they obse...

KR
Answered by Katherine R. Physics tutor
3923 Views

How do you know when to use the imperfect tense and when to use the perfect?

The imperfect tense is used for an action that was ongoing in the past (Je lisais un roman = I was reading a novel). These verbs are often incomplete, hence, imperfect. An example of this...

ML
Answered by Matthew L. French tutor
3340 Views

On a day with no wind, a large object is dropped from a tall building. The object experiences air resistance during its fall to the ground. State and explain, in terms of the forces acting, how the acceleration of the object varies during its fall.

As the object is released two forces act on it.Its weight and and air resistance. At this point its weight is much greater due to the force of gravity on the object so it accelerates downward. As its s...

AY
26090 Views

Is a range of media important in my coursework and exam portfolio?

Students tend to misinterpret the learning outcome of experimentation and usually look at it as just testing out diffrent ideas. This is wroung as experimentation is up to the artist and requires a w...
AY
Answered by Abdulmuminu Y. Art tutor
7796 Views

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