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According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?

The key to this question is realising that the action and corresponding reaction refer to forces that act on different objects . When I push the box, I exert a force on the box. As a result of this force, th...
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Answered by Ellen S. • Physics tutor
6938 Views

Define the term osmosis

Osmosis is the movement of water particles from an area of high concentration to an area of low concentration through a partially permeable membrane along a concentration gradient.
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Answered by Alice D. • Biology tutor
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What's the difference between movements along and shifts in the demand curve?

(the answer to this question would be assissted by the use of diagrams) Movements along the demand curve are caused by changes in price. A change in price will move to a new point on the demand curve. For ex...
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Answered by Sarah L. • Economics tutor
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How do I work out the measurement of an angle in a right-angle triangle?

When solving an angle for a right-angled triangle you need to use the acronym SOH CAH TOA, using the functions sin(x), cos(x) and tan(x). The other letters O, H and A represent the side of the triangle, stan...
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Answered by Zoe S. • Maths tutor
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What is the difference between an Alkane and Alkene?

Both alkanes and alkenes are examples of hydrocarbons, which mean they are made up of hydrogen and carbon only.Alkanes however are 'saturated' and have no double bonds between the carbon atoms.Alkenes on the...
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Answered by Ellie T. • Biology tutor
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