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At a baseball game on a cool day (air temperature of 16oC), a fan hears the crack of the bat 0.25 s after observing the batter hit the ball. How far is the fan from home plate?
The sound level measured 5.2 m away from a jet engine is 140 dB. What is the intensity of the sound at 5.2 m? What is the power transmitted by the sound waves? At what distance is the sound level exactly half?
An electric field of 660 N/C is desired between two parallel plates 17.0 mm apart. How large a voltage should be applied? What is the surface charge density on a plat If total charge Q = 3 μC is to be stored what should be its capacitance? What is th..
q1. a cart starts from rest at the top of the tilted track. assume the track is frictionless. the cart passes photo
A magnetic-field technique for stabilizing a He-Ne laser to 2parts in 1010has been patented. At 632.8 nm, what would be the coherence length of a laser with such frquency stability
although the magnitudes of the equipotentials and electric fields for electrode configurations a and b are consistent
An electron is confined to a one-dimensional region in which its zero-point (n = 1) energy is 2.90 eV. What is the length of the region
A car traveling 90km/h slows down at a constant 0.50 m/s^2 just by "letting up on the gas." Compute the distance it travels during the third second.
In the railroad freight yard, an empty freight car of massmrolls along a straight level track at1.0m/s and collides with an initially stationary, What is the speed of the two cars after the collision
A performer seated on a trapeze is swinging back and forth with a period of 8.85 s. what will be the new period of the system
A skier is gliding along at 2.8m/s on horizontal, frictionless snow. He suddenly starts down a 10?incline. what is the distance of the incline
draw an accurate sketch of the vector addition of the two known forces. use a protractor to draw the forces in the
A pair of in-phase stereo speakers is placed side by side, 0.61 m apart. You stand directly in front of one of the speakers, 0.8 m from the speaker. What is the lowest frequency that will produce constructive interference at your location?
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