Most rockets convert the energy stored in their propellant mass into the mechanical energy required to expel it as exhaust. The 'rocket equation', which describes how a rocket's speed changes with mass, is usually derived by assuming that this fuel is expelled at a constant relative velocity. However, this is a poor assumption for cases where the…

Discusses statistics concerning world energy requirements and supplies of different types of fuels. Also discusses the storage and transmission of energy and pollution problems related to energy utilization. (MLH)

Explores the possibility of installing offshore windmills to provide electricity and to save fuel for the United Kingdom. Favors their deployment in clusters to facilitate supervision and minimize cost. Discusses the power output and the cost involved and urges their quick development. (GA)

Explains the function of a central heating system and calculates the total heat energy required to heat a house. Estimates annual heat requirement and amount of fuel needed. Gives detailed calculation of heat required for a particular house as an example. (G A)

We have used the GPS receiver and a PC interface to track different types of motion. Various hands-on experiments that enlighten the physics of motion at the secondary school level are suggested (visualization of 2D and 3D motion, measuring car drag coefficient and fuel consumption). (Contains 8 figures.)

Presents a long-term energy policy, to ensure a stable world civilization in the next century, that requires the developed nations to lower their energy consumption to the present world average. (GA)

Looks at the process of photosynthesis in a new light, to show that distinct possibilities exist for using photosynthesis to harvest fuel, food, fibre, and chemicals. (GA)

Describes a multi-project pack on central heating systems, developed into an educational game, used for teaching a variety of subjects in high school. The students examine the basic decision to install a central heating system, for a particular house, and the economics involved. (GA)