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At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, where you're sitting, increases by 80.0%.
(a) By what percentage does the intensity increase?
(b) How does the intensity level (in dB) change?
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. determine the net external torque that acts on each wheel
The mass density of an object is 20.0 g/cc, and its mass is determined to be 104 g. What is the volume of the object
A wave of amplitude Ai and wave number ki is incident on the junction of two strings. If the wave number in the second string is kt = 2ki , find the amplitudes of the transmitted and reflected waves.
If 5.0 moles of air is at 0.0 degrees Celsius and 1.0 atm pressure, what is the volume occupied by the gas in m^3
An oxygen bubble at the bottom of a lake 20. m deep has a volume of 1.20 cm^3, calculate the initial pressure inside the bubble at the bottom of the lake
The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of the alpha particle
Two charges, +q and -q, are located in the x-y plane at points (0,+d/2) and (0,-d/2), respectively. Calculate the magnitude of the electric field at point P with the superposition principle
questiona. draw one diagram showing plan view footprint of the building and nearby obstacles and others showing the
q1. a robot probe drops a camera off the rim of a 255 m high cliff on mars where the free fall acceleration is 3.8 ms2.
A particle moving in a straight line with constant accelaration - Find the velocity of particle at the mid point of the path.
Picture yourself in the castle of Helm's Deep from the Lord of the Rings. You are on top of the castle wall and are dropping rocks on assorted monsters that are 15.55 m below you. How long after you release the rock does this happen
A 2.0g metal ball that carries a charge of 10uC is placed into an electric field, what is the electric potential difference between point A and point B
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