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A man drops a rock into a well. (a) The man hears the sound of the splash 2.0 s after he releases the rock from rest. The speed of sound in air (at the ambient temperature) is 336 m/s. How far below the top of the well is the surface of the water? I found the correct answer here. =18.4 (b) If the travel time for the sound is ignored, what percentage error is introduced when the depth of the well is calculated?
Two loudspeakers are located 3.15 m apart on an outdoor stage. A listener is 16.3 m from one and 17.4 m from the other. During the sound chek, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted ..
A 200 gram ball, moving at 6.0 m/s, is catching up and colliding elastically witha 600 gram ball that is moving along the same line
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an archaeologist finds an ancient firepit containing partially consumed firewood, what is the age of the ancient site
Two long straight parallel wires are 19cm apart. Wire A carries 2.0-A current. Wire B's current is5.0A in the same direction, Determine the force per unit length on wire B due to wire A
A 0.49 kg block attached to a spring with force constant 150 N/m is free to move on a frictionless, At that instant, find the force on the block
A laser emits light at power 3.00 mWand wavelength 633 nm. The laser beam is focused (narrowed) untilits diameter matches the 1266 nm diameter of a sphere placed in itspath. What is the beam intensity at the sphere's location
the weight of the block on the table is 380 N and that of the hanging block is 175 N. What is the acceleration of the two block
A large solar panel on a spacecraft in Earth orbit produces 2.2{\rm kW} of power when the panel is turned toward the sun. What power would the solar cell produce
What is the rotational kinetic energy of the Earth? Use the moment of inertia you calculated in Part A rather than the actual moment of inertia given in Part B.
An object has a total energy of 5.60 × 1015 J and a kinetic energy of 1.40 × 1015 J. find the magnitude of the object's relativistic momentum
The path of an electron, travelling at 3.7 × 104 meters/second, is making the right angle to a magnetic field. A single electron experiences a force of 2.2 × 10-15 Newton's while in the field. What is strength of the magnetic field .
a dynamite blast at a quarry launches a rock straight upward and 2.3 s later it is rising at a rate of 14 ms. assuming
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