By Sharon Wynne
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Read or Download FTCE Physics 6-12 (XAM FTCE) PDF
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Extra info for FTCE Physics 6-12 (XAM FTCE)
1m A second vector D2 is broken up into its components in the diagram below using the same techniques. 5m. 1 m Now we have to use the Pythagorean theorem to get the total magnitude of the final vector. And the arctangent function to find the direction. As shown in the diagram below. 3 Determine the dot product and cross product of two vectors. The dot product is also known as the scalar product. , a real number without an associated direction). The definition of the dot product of the two vectors a and b is: n a • b = ∑ ai bi = a1b1 + a 2 b2 + ...
3 Calculate the amount of heat transfer by conduction or radiation, given appropriate data. The amount of heat transferred by conduction through a material depends on several factors. It is directly proportional to the temperature difference ∆ T between the surface from which the heat is flowing and the surface to which it is transferred. Heat flow H increases with the area A through which the flow occurs and also with the time duration t. The thickness of the material reduces the flow of heat.
To determine precision, however, we must make multiple measurements of the same sample. The precision of an instrument is typically given in terms of its standard error or standard deviation. Precision is typically divided into reproducibility and repeatability. These concepts are subtly different and are defined as follows: Repeatability: Variation observed in measurements made over a short period of time while trying to keep all conditions the same (including using the same instrument, the same environmental conditions, and the same operator) Reproducibility: Variation observed in measurements taken over a long time period in a variety of different settings (different places and environments, using different instruments and operators) Both repeatability and reproducibility can be estimated by taking multiple measurements under the conditions specified above.