Physics, 01.03.2021 21:30 raymond5799
A force of 3600 Nia exerted on a piston that has an area of 0.040 m2. What force is exerted on a second piston that has an area of 0.20 m2?
Answers: 3
Physics, 23.06.2019 01:30
In general what determines whether atoms will form chemical bonds?
Answers: 2
Physics, 23.06.2019 16:00
In an exothermic chemical reaction the energy gained by the surroundings must be the energy lost by the reaction
Answers: 3
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
Physics, 23.06.2019 23:20
Astudent performs a reaction in a beaker by reaction silver nitrate with one long copper wire. the student’s thermometer changes from 27°c to 35°c. based on this, is this reaction endothermic, exothermic, or neither? explain your reasoning.
Answers: 1
A force of 3600 Nia exerted on a piston that has an area of 0.040 m2. What force is exerted on a sec...
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