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When the E sting of a guitar which has a frequency 330Hz is plucked, the sound intensity decreases by a factor of 2 after 4s. Determine a) the decay time and b) the quality factor Q.
A projectile is fired at an upward angle of 45° from the top of a 312 m cliff with a speed of 220 m/s. What will be its speed when it strikes the ground below
A 7.80-g bullet moving at 650 m/s penetrates a tree trunk to a depth of 5.4 cm. Use work and energy considerations to find the average frictional force that stops the bullet
Riders on the "Great American Revolution" loop-the-loop roller coaster wear seatbelts as the roller coaster negotiates its 6.5m -radius loop with a speed of 9.8m/s.
A transformer is to be used to provide power for a computer disk drive that needs 5.8 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
A standardized biological microscope has an 8.0--focal-length objective. What focal-length eyepiece should be used to achieve a total magnification of.
Explain what was observed with the horizontal motion of the man and the boat in terms of Newton's Laws of Motion.
two forces F1 and F2 act a body of mass m on.If m=5.0 kg,F1=3.0 N and F2=4.0 N find the vector of acceleration of the body
Supply a small island (population of 1 million, some industry, some military) with electrical power. How many power plants would you need
A Cassegrain astronomical telescope uses two mirrors to form the image. Compute the radius of curvature of a secondary mirror
A block of ice rests across the whole of a rectangular table. A wire on which we attach a 10 kg weight surrounds the ice. Explain why the wire will go through the ice block without the ice breaking into two pieces.
The two conducting rails in the drawing are tilted upwards so theyeach make an angle of 30.0° with respect to the ground.
A ship is heading off to Barnard's star at 0.700c. When it passed a space station(at rest with respect to the Earth) few days out from Earth, determine the direction and speed of each torpedo as seen by the station
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