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The light from a single car is photographed from a high vantage point with a time exposure. What is the line that is observed in the photograph? A long time passes as a large number of car lights are photographed instantaneously on the same road from the same high vantage point. What is the relation between the two photographs? Explain similarities and differences.
Two speakers are placed along a wall 3m apart. They are in phase and emitting the same tone (440 Hz). Where along the wall should you stand to hear the loudest signal
What is the magnification of the hair?
A 35 mm camera has a rectangular array of CCDs (light sensors) that is 24 mm by 36 mm. How far should the person stand from the camera if the focal length of the lens is 63 mm
Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal, What tension does his rope need to support
q1. consider a too-small space station that consists of a 3.8 m radius rotating sphere. a man standing inside is 1.9 m
A 5.00-kW motor is used to pull a 20.0-kg crate up a 15.0°-incline of length 4.00 m. At what average velocity can the motor move the crate up the incline
A fighter jet is launched from an aircraft carrier with the aid of its own engines & a steam-powered catapult. The thrust of its engines is 2.3 x 105 N. In being launched from rest it moves through a distance of 87 m & has a kinetic energy of 4.5 ..
A liquid flows through a 2-cm-diameter pipe at a rate of 20 L every minute. Assume a laminar flow and estimate the pressure drop over 20 m of length in the horizontal pipe for water at 40-C,
A puck (mass m1 = 2.50 kg) slides on a frictionless table. The puck is tied to a string that runs through a hole in the table and is attached to a mass m2 = 7.5 kg. What is the change in the kinetic energy of the puck
A bulldozer pushes a large rock, and the two move forward together. The bulldozer does 1500 J of work on the rock. How much work does the rock do on the bulldozer
To vaporize 1 g of water requires about 538 cal of heat interaction at 100 degrees C. The resulting vapor at 1 atm occupies a volume of 1674 cm^3. What fraction of the heat of vaporization represents the work needed to push back the atmosphere to mak..
Find the radius of the largest water drop
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