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The sound intensity at a gasoline station next to a freeway averages 10^-3 W/m2. The owner decides to collect this energy and convert it to thermal energy for heating his building.
Assuming that this conversion is 100% efficient, what is the length of one side of a square sound collector that is needed to provide thermal energy at a rate of 480W ?
a small object is 10 cm to the left of a converging lens f 5 cm and a second diverging lens f -3.3 cm is 5.8 cm to
a stationary radar operator determines that a ship is 13 km south of him. an hour later the same ship is 25 km
If the acceleration of the statue, upon striking the pillow, is constant, what is the value of the acceleration if the pillow compressed by 3.9cm as the statue comes to rest
A car travels straight along the street from the grocery store to the post office
Oil is pumped at 25.0 m³/min into a tank 10.0 m above the ground. (1 L of oil has a mass of 0.68 kg.) What power, in kW, must be delivered by the pump
in the game of baseball the catcher uses his fingers to send a sign to the pitcher telling what pitch to throw next.
q1. a hotel elevator ascends 270 m with a maximum speed of 5.0 ms. its acceleration and deceleration both have a
what is the beat frequency heard when two organ pipes each open at both ends are sounded together if one pipe is 58 cm
When the tension in a cord is 77.4 N, the wave speed is 132 m/s. What is the linear mass density of the cord
A 15 V battery drives a current through a 36 Ω resistor and a 14 Ω resistor. Determine the voltage drop across the 14 Ω resistors
An electric dipole is situated such that +q is at coordinates (+d,0) and -q is at (-d,0)?. Point P is located at (+2d,+2d) What is the magnitude of the electric field at point P?
When viewed in a spherical mirror, the image of a setting sun is a virtual image. The image lies 12 cm behind the mirror. (a) What is the focal length of the mirror
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