Physics, 28.06.2019 08:30 dpchill5232
The layer of gases that surrounds the earth is the hydrosphere atmosphere lithosphere weathersphere
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Physics, 22.06.2019 04:00
When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative
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Physics, 22.06.2019 14:00
Ascientific blank must be testable and capable of being proven false?
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Physics, 23.06.2019 10:00
If the moon rises at a given location at 6: 00 p.m. today, about what time will it rise tomorrow night?
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Physics, 23.06.2019 16:00
Acommon procedure for measuring the velocity of an airstream involves the insertion of an electrically heated wire (called a hot-wire anemometer) into the airflow, with the axis of the wire oriented perpendicular to the flow direction. the electrical energy dissipated in the wire is assumed to be transferred to the air by forced convection. hence, for a prescribed electrical power, the temperature of the wire depends on the convection coefficient, which, in turn, depends on the velocity of the air. consider a wire of length l = 20 mm and diameter d = 0.5 mm, for which a calibration of the form v = 6.25 ă— 10â’5 h2 has been determined. the velocity v and the convection coefficient h have units of m/s and w/m2 â‹… k, respectively. in an application involving air at a temperature of tâž = 25â°c, the surface temperature of the anemometer is maintained at ts = 75â°c with a voltage drop of 5 v and an electric current of 0.1 a. what is the velocity of the air?
Answers: 1
The layer of gases that surrounds the earth is the hydrosphere atmosphere lithosphere weathersphere...
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