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A pair of earplugs claims to reduce the sound level by 37.1 dB. By what factor is the intensity reduced?
A circular disk has surface charge density 8.0nC/cm^2. What will the surface charge density be if the radius of the disk is doubled? Express your answer to two significant figures and include the appropriate units.
What was the speed of the car before impact
A proton is moving in an uniform electric field of part (a). At point A, the velocity of the proton is 1.90 X 104 m/s, east. What is the speed of proton at point B.
Illustrate what constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with Sally?
The string has a breaking-point force of 45 N. Illustrate what is the largest value v can have without the string breaking?
A particle has initial velocity 5 m/s due east and acceleration 2 m/s^2 due west. Find the distance traveled during 3rd second of the motion.
Write down an expression for the efficiency of the air cart bumper in terms of the initial and final kinetic energy of the cart. What defines a collision as elastic or inelastic.
Illustrate what factor caused fewer purchases to be planned? Suggest business conditions that would cause this factor to both occur and impact the company in this way."
Two runners compete in a race of 10.04 km. One runner has a steady speed of 11.14 km/h. What is the difference in time for the two runners
The plates of a parallel-plate capacitor are 3.00mm apart, and each carries a charge of magnitude 77.0nC. The plates are in vacuum. What is the area of each plate
Two parallel wires are 5 m long. They are seperated by a perpendicular distance of 1 cm and carry currents of 20 A, Find the interaction force between the wires
Starting from rest, a 40 kg body reaches a speed of 8.0m/s in 2s. Calculate the force acting on the body?
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