What is the variation of pressure in the sound wave
A microphone has an area of 6.6 cm2. It receives during a 2.80 s time period a sound energy of 3.6x10-11 J. What is the variation of pressure in the sound wave if the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?
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What are the forces on two charges of +0.43 C and +2.0 C, respectively, if they are separated by a distance of 1.6 m
A 40 cm diameter wheel accelerates uniformly from 240 rpm to 360 rpm in 6.5 s. how far will a point on the edge of the wheel have traveled in this time?
A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. What is the minimum force the nurse needs to apply to the syringe? The nurse empties the syringe in 2.70 s. What is the flow speed of the medicine through
We observe two charges separated by a distance of 1.00 meters. If the distance between the two charges is changed to be half what it was, by what factor would the electric force of between them be changed. That is, what is the ratio of the new for
What is the variation of pressure in the sound wave if the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?
High-speed stroboscopic photographs show that the head of a 270 g golf club is traveling at 55 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 46 m/s. Find the spe
An air puck of mass 0.273 kg is tied to a string and allowed to revolve in a circle of radius 0.85 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.48 kg is tied to
Consider a refracting telescope. If it has an objective lens with fobj = 1.8 m and an eyepiece with feyepiece = 2.9 cm, what is the angular magnification of the telescope?
sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 m/s. What is the difference in time that the message is received?
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