Spherical of sound and neglecting absorption in the air

Reference no: EM13554792

At a rock concert, a dB meter registered 130 dB when placed at a2.8 m in front of a loudspeaker on the stage. (a) what was thepower output of the speaker assuming uniform spherical ofthe sound and neglecting absorption in the air?(b) how far awaywould the sound level be a somewhat reasonable 90 dB.

Reference no: EM13554792

Questions Cloud

What are the east and north components of its displacement : A golf ball, hit from the tee, travel 325 m in a direction 25 degrees south of the east axis. What are the east and north components of its displacement?

Direction of the electric field andthe normal to the surface : A circular surface with a radius of 0.059m is exposed to a uniform external electric field of magnitude1.58*104 N/C. The electric flux through thesurface is 80 N · m2/C. What is the angle between the direction of the electric field andthe normal to t..

What are frequency of motion in hertz-angular speed of ball : A ball rotates in a circle of radius 20.0 cm, making one complete revolution every 2.00 s. What are (a) the speed of the ball, (b) the frequency of motion in hertz, and (c) the angular speed of the ball?

What is the mass of the bird : A bird sits on a telephone wire midway between two poles 20 meters apart. The wire, assumed weightless, sags by 50 cm. If the tension in the wire is 90 Newtons, what is the mass of the bird?

Spherical of sound and neglecting absorption in the air : At a rock concert, a dB meter registered 130 dB when placed at a2.8 m in front of a loudspeaker on the stage. (a) what was thepower output of the speaker assuming uniform spherical ofthe sound and neglecting absorption in the air?(b) how far awaywoul..

Resting on a nonconductin sheet of plastic : A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconductin sheet of plastic. (a) Show how the charges are arranged on these spheres if they are very far from each other.

What error did he made in his choice of temperature scale : Waly Whacko claims to have invented a heat engine that will revolutionize industry. What error did he made in his choice of temperature scale

Estimate the annual cost to operate the bulb : A 100-W driveway light bulb is on 10 hours per day. Assuming thepower company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.

Find what is the increase in temperature of the bullet : 4.30 g lead bullet traveling at 320 m/s is stopped by a large tree. what is the increase in temperature of the bullet

User Account

All Pages