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...energies remained the same. Decreasing the wavelength of the light, however, caused the electrons to be emitted with a higher maximum energy. Conversely, increasing the wavelength of the light beyond a particular cut-off value (specific to each metal), caused the emission of electrons to cease. The explanation was that light interacts with matter as if it is composed of a...

...energy. These gaps in knowledge are frustrating for anyone who would like to understand the nature of the Universe. In this free course, Unsolved problems in cosmology, you will learn about what the current unsolved problems are and about the possible ways in which they may be solved in the future...The science of cosmology has been very successful in explaining a wide...

...energy change, providing a useful way of modelling the behaviour of a glider in the air. This material makes up part of the course MST209, Mathematical methods and models... Soaring by Design A short introduction to this album. Modeling Flight Introducing the forces a glider is exposed to during flight. Avoiding Collisions Demonstrating the change of energy when a pilot...

...energy harvesting systems needed to charge them. The body electric Piezo is a term derived from a Greek word meaning to squeeze or press, and piezoelectric materials generate electricity when they are pressured or twisted – enabling development of shoes, clothing or recreational gear that generate electricity from movement. Flexible batteries can be used to store the...