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At a cocktail party each person is speaking equally loudly. If only one person was speaking, the sound level would be 72 dB. What is the actual sound level if 38 people are present (and all are speaking at the same time without listening!)?
The equation of a transverse wave traveling along a very long string is y = 6.02 sin(0.0358?x+ 2.10?t), Determine what the wavelength and frequency
a light ray traveling in a slab of crown glass surrounded by air. the ray is incident on the right surface at an angle
A 3.0kg block is attached to a string that is wrapped around a 2.0kg , 4.0-cm-diameter hollow cylinder that is free to rotate. Use conservation of energy to find the speed of the block as it hits the ground
In a material having an index of refraction n , a light ray has frequency f, wavelength ?, and speed v. What is the frequency of this light in vacuum and in a material having refractive index n1
The drive motor is shifted to turn the carousel at a higher constant rate of rotation, Calculate the coefficient of static friction between the bag and the carousel
A circuit contains a 150-? resistor, a 0.0530-H inductor, a 0.420-?F capacitor, and a source of time-varying emf connected in series. Determine the voltage drop across the inductor
a gold nucleus has a radius of 7.3 x10-15 m and a charge of 79e. through what voltage must an alpha-particle with its
Two vehicles approach an intercetion at right angles and collide. If vehicle #2 has a mass of 600kg, vehicle #1 has a mass of 300kg, and they are both travelling at 13 m/s before the collision, what is the magnitude and direction of the final velo..
Liquid mercury has a density of 13,534 Kg/m3. What is the pressure difference (gauge pressure) between a point on the surface and one point 1 m deep inside a tank of mercury?
A cylindrical storage tank has a radius of 1.46 meter. When filled to a height of 3.56 meter, Evaluate what the density of the solvent
a diffraction pattern forms when light passes through a single slit. the wavelength of the light is 665 nm. determine
two balls of identical mass of 2.050 kg and with identical charges placed on them hang from the ceiling on identical
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