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What is the acceleration due to gravity at the space station.

Why do astronauts appear weightless despite being near the Earth?

This YouTube video explains how to calculate an irregular area on a map.

This YouTube video explains how to calculate a regular area on a map.

Basics of gravity and the Law of Universal Gravitation.

This online tutorial guides you through what information a map shows, map legends and the different types of maps which are available.

This unit is about how things move along a straight line or, more scientifically, how things move in one dimension. Examples of this would be the movement (motion) of cars along a straight road or of trains along straight railway tracks.

Osmosis is the movement of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. Osmosis helps regulate the flow of water in and out of cells, which is crucial to their function.

Speed necessary for the space station to stay in orbit.

This online tutorial will provide you with some guidelines on how to interpret both topographic and geologic maps.