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If we increase the intensity of a sound wave by a factor of ten thousand, obtain how much have we increased the loudness of the sound in decibels (dBs)?
Purchase new automated equipment that will change the proportion between variable and fixed costs to 40% variable and 60% fixed. Determine the selling price per unit. Calculate the break-even point in dollars for 2011.
A marble (radius 1.0 centimeter and mass 8.0 gram) rolls without slipping down a ramp of vertical height 20 centimeter. Estimate the speed of the marble when it reaches the bottom of the ramp
find the speed of the block as it hits the ground.A 4-kg ball traveling to the right with a speed of 4 m/s collides with a 5-kg ball traveling to the left with a speed of 2 m/s. What is the total momentum of the two balls after they collide.
A 3 microcoulomb charge is at the coordinated (3,4)mm. A -4 microcoulomb charge is at the coordinates (-2,5)mm. find the Electric field vector in polar coordinates at the origin
two balls of identical mass of 2.050 kg and with identical charges placed on them hang from the ceiling on identical
At t=0 a grinding wheel has an angular velocity of 21.0rad/s . It has a constant angular acceleration of 35.0rad/s^2 until a circuit breaker trips at time t = 2.50s. What was its acceleration as it slowed down
what is the maximum amount of electric charge per unit length that can be placed on a long and straight human hair of
The cable lifting an elevator is wrapped around a 1.0--diameter cylinder that is turned by the elevator's motor. How long does it take for the elevator to stop
When a diver jumps into the ocean, water leaks into the gap region between the diver's skin and her wetsuit, estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
Starting from rest, a 4.30-kg block slides 2.00 m down a rough 30.0° incline. Determine the work done by the force of gravity
sound exits a diffraction horn loudspeaker through a rectangular opening like a small doorway. a person is sitting at
a storage tank at stp contains 19.1 kg of nitrogen what is the volume of the tank? what is the pressure if an
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