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| Pfister, Hans | 1 |
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Direct linkPfister, Hans – Physics Teacher, 2014
Physics students encountering electric circuits for the first time often ask why adding more resistors to a circuit sometimes increases and sometimes decreases the resulting total resistance. It appears that these students have an inadequate understanding of current flow and resistance. Students who do not adopt a model of current, voltage, and…
Descriptors: Physics, Equipment, Energy Education, Science Equipment
Peer reviewedGravatt, C. C., Jr. – Journal of the Air Pollution Control Association, 1973
Discusses a light scattering instrument designed to measure the size of particles in an air flow in approximately 25 microseconds and at a concentration as high as 10,000 particles/cc. Indicates that the measurement can be made for all particles, independent of their index of refraction. (CC)
Descriptors: Air Pollution, Environmental Education, Equipment, Equipment Utilization
