Physics, 29.06.2019 05:30 nauticatyson9
1. two loudspeakers are placed 4.5 m apart. they produce the same sounds, in step, at a frequency of 829 hz. constructive interference is observed at point p, which is 5.30 m from one loudspeaker and a distance x from the other. which is a possible value of x? assume the speed of sound is 340 m/ a.6.60 b. 6.77 c. 6.80 d. 6.88 e. 6.53 2. two loudspeakers are placed 6.0 m apart. they produce the same sounds, in step, across a frequency range of 252 hz to 665 hz. point p is located 5.10 m from one loudspeaker and 3.60 m from the other. what frequency of sound from the two speakers will produce constructive interference at point p? assume the speed of sound is 344 m/s. a. 631 b. 401 c. 459 d. 573 c. 516
Answers: 2
Physics, 22.06.2019 10:00
** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils
Answers: 1
Physics, 22.06.2019 15:10
An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?
Answers: 2
Physics, 23.06.2019 01:30
Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.
Answers: 2
1. two loudspeakers are placed 4.5 m apart. they produce the same sounds, in step, at a frequency of...
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