Physics, 26.07.2019 14:30 kolbehoneyman
Adevice contains an electric circuit, powered by a battery, that provides light energy and heat energy. it is a a) television. b) flash light. c) electric oven. d) barbecue grill.
Answers: 1
Physics, 23.06.2019 01:00
Suppose that two objects attract each other with a gravitational force of 16 units. if the distance between the two objects is double, what is the new force of attraction between the two objects?
Answers: 3
Physics, 23.06.2019 10:50
In the graph, each sinusoidal curve shows the shape of a vibrating string at a different moment. for which values of x does a node occur? (let k = an integer from -2 to +2.) k + 0.5 0.5k k 2k + 1.5
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Physics, 23.06.2019 14:00
Which of the following is an example of a compound machine. a. a bicycle chain. b. a coffee mug. c. a paper cutter
Answers: 1
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 Δβ 10Γ’β5 h2 has been determined. the velocity v and the convection coefficient h have units of m/s and w/m2 Γ’βΉβ¦ k, respectively. in an application involving air at a temperature of tΓ’ΕΎ = 25Γ’Β°c, the surface temperature of the anemometer is maintained at ts = 75Γ’Β°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
Adevice contains an electric circuit, powered by a battery, that provides light energy and heat ener...
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