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A person stands at a point 379 min front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard? (Assume the speed of sound is 344 m/s.)
At a recent rock concert, a dB meter registered 122 dB when placed 2.20 m in front of a loudspeaker on the stage. Determine the power output of the speaker
An ant travels in a perfectly straight line in the –x direction some distance. It turns, and then travels some new displacement, 30.0O above the +x axis, again, in a straight line, for some distance. The final leg of its little ant journey is a displ..
a rocket is moving through empty space in a straight line with constant speed. it is far from gravitational effect of
consider a point charge with a charge q located at the origin in an empty space. let the electric potential be zero at
A bullet of mass 5.9 g is fired horizontally into a 3.8 kg wooden block at rest on a horizontal surface. What is the speed of the block immediately after the bullet stops relative to it? At what speed is the bullet fired?
a marble column of a cross sectional area 1.5 m^2 suports a mass of 24000 kg, what is the stress within the ciolumn? N/m^2
An air source heat pump with a heating cop of 4 is used to heat a house. The input rating of the heat pump is 3.3 horsepower. how much electrical energy does it use per month
In an electric shaver, the blade moves back and forth over adistance of 2.1 mm in simple harmonic motion, with frequency 118Hz. obtain the magnitude of the maximum blade acceleration
The time it takes to go from rest to 30 mph at constant deceleration can be measured to an accuracy of 1%. What is the percentage uncertainty in the distance travelled?
A 3.1kg block of wood sits on a table. A 3.0 gbullet, fired horizontally at a speed of 540m/s , find the speed of the block immediately after the bullet exits
a diving bell in the shape of a cylinder with height 2.5m is closed at upper end and open at the bottom. its lowered
consider a point p on the viewing screen of a double-slit interference experiment. this point is 45 of the way from the
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