This video describes the key differences between vectors and scalars.  It explains that vectors depend upon both magnitude (amount) and direction, whereas scalars are dependent upon magnitude and are independent of direction.

Examples of vector quantities are listed as: displacement, velocity, acceleration,...

Behaviour...

Published by the Wellcome Trust, this issue explores the biological basis of sex differences and the relationship between sex and gender.

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This video shows how cards with different shaped holes circle, square, triangle), held to the sun, produce circular points of light, because what is seen is the image of the sun (this is how a pinhole camera works).

Shefali engages with customers, media and investors to help to grow the company.  Shefali works at Oxford Space Systems, a company developing innovative technology that is launched into space.  She often helps to act as the link between customers and the engineers working on the satellite designs.