Aconcert loudspeaker suspended high off the ground emits 34 w of sound power. a small microphone with a 1.0 cm2 area is 44 m from the speaker. part a -what is the sound intensity at the position of the microphone? express your answer in mw/m2and using two significant figures. i = /m2part b -what is the sound intensity level at the position of the microphone? express your answer in db using two significant figures.β=
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As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.
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What is the scientific definition of energy that relates to work
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Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.
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Aconcert loudspeaker suspended high off the ground emits 34 w of sound power. a small microphone wit...
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