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When two atomic nuclei are heated to a very high temperature and high pressure, for example inside a star, their nuclei can join to make a larger nucleus. Energy is released when this fusion takes plac...

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...

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...

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...

This question can be solved using suvat equations, since the acceleration due to gravity is constant. First make a list of the variables given in the question;

s=0.5m

u=0ms<...