Physics, 20.06.2021 15:30 123abc321cbaabc
Darwin believed that emotional expressions began as that came to have evolutionary value because they .
Select one:
a. physiological reactions; increased the efficiency of bodily reactions
b. communication devices; increased the efficiency of bodily reactions Incorrect
c. physiological reactions; convey emotional states to other members of the species
d. random mutations; convey expectations to other members of the species
Answers: 3
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Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy
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An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field
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Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?
Answers: 1
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Ideal meters problem. what internal resistance is ideal for a voltmeter? what internal resistance is ideal for an ammeter?
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Darwin believed that emotional expressions began as that came to have evolutionary value because th...
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