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a) What is the ratio of the intensity of an earthquake wave as itpasses a point 20 km from the source tothe intensity as it passes a point 12 kmfrom the source?b) What is the ratio of the amplitude of an earthquake wave as itpasses a point 20 km from the source tothe amplitude as it passes a point 12 kmfrom the source?
Briefly explain how we modify the Energy Conservation equation when there is work don't by forces outside of our system of interest? Be clear on what the modification means in terms of the total energy within our system.
A source of electromagnetic waves radiates power uniformly in all directions at a single frequency. At a distance of 7.00 km from the source, What is the average power radiated by the source
The water molecule H2O, with a permanent dipole moment of magnitude of 6.2x10^-30 Cm, What force does the ion exert on the water molecule
A 0.50 kg ball that is tied to the end of a 1.30 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical. If the cord can withstand a maximum tension of 9.5 N, what is the highest speed at which ball can ..
A Circuit has two identical capacitors with capacitance 4x10^-6 in parallel connected to two identical four ohm resistors in parallel. What is the initial charge on the capacitors
five resistors are connected to a battery with an emf of 12 V and internal resistance of 1 ohm. calculate the external resistance of the circuit
An inductor with L = 9.15mH is connected across an ac source that has voltage amplitude 45.5V. Does the source voltage lag or lead the current
A guitar string is under a tension of T = 198N. The string has a mass of m = 99g and length L. What is the length of the string in m
A thin 7.3-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod. What is the frequency of the rod's vibration
A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He suddenly starts down a 10° incline. His speed at the bottom is 15 m/s. How long does it take him to reach the bottom
A rock is projected from the edge of the top of a building with an initial velocity of 17.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 93 m from the base of the building. The accelerati..
An unstable particle with a mass equal to 3.34 10-27 kg is initially at rest. Find the masses of the fragments
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