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You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. You use your fog horn to send out a blast of sound (assume the temperature of the air is 20 oC) and the time it takes for the sound to return to you is 10.7 s. How far away are the cliffs (in metric units)? Hint: Be careful and think about the physics of the problem. You may want to make a sketch of the situation to help you determine the answer.
The speaker coil consists of 100 turns of wire, 2cm in diameter. The current in the speaker will be 1.6 A when the force on the speaker coil is 14.8 N. What strength magnetic field will give this force.
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
A bungee jumper undergoes simple harmonic motion with amplitude 4.6m and frequency 0.145Hz, Determine the bungee jumper's velocity at 1.0 s
An infinitely long line of charge has linear charge density 4.00 10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 10-19 C) is 17.0 cm from the line and moving straight toward the line at 3000m/s.
Two point charges are fixed to rectangular coordinate system, Charges of q1 = 3.5uC and q2 = -15 uChave coordinates (0.55,0) and (0,0) in meters respectively
A system expands by 0.68m3 at a constant pressure of 126kPa, Find the heat that flows into or out of the system if its internal energy decreases by 1850J
A 64.0-kg survivor of a cruise line disaster rests atop a block of Styrofoam insulation, using it as a raft. What total mass of survivors can the raft support
A blood transfusion is being set up in an emergency room for an accident victim. What is the distance h above the victim's arm where the level of the blood in the transfusion bottle should be located
A 51.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 12 ? 10-8, What must be the diameter of the wire
A river ?ows at a speed vr = 5.85 km/hr with respect to the shoreline. A boat needs to go perpendicular to the shoreline to reach a pier on the river's other side, determine the width of the river
A parallel-plate capacitor with only air between the plates is charged by connecting it to a battery, A voltmeter reads 46.0V when placed across the capacitor, What is the dielectric constant of this material
A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C, find the specific heat capacity of the unknown material
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