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Suppose you stir 1 kg of water until its temperatue raises by 1 degree C. How much work did you do on the water? (The scpeific heat of water is c= 1 kcal/kg degree C.)
A uniform narrow tube 1.80m long is open at both ends. It resonates at two successive harmonics of frequencies 279Hz, What is the speed of sound in the gas in the tube
Suppose you have a near-point distance of 16 cm. The angular resolution of the eye is determined by diffraction, What is the smallest object your bare eye can resolve
a) Write an expression for the magnitude of the force, F, that propels the dragster forward in terms of the variables provided. b) If the track has length L, select the correct symbolic equation for how fast Vf the dragster is traveling when it fi..
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
A therapist examines the range of motion of an athlete's knee joint. What was the angular displacement of the lower leg from full extension to full flexion
In a dentist's office an X-ray of a tooth is taken using X-rays that have a frequency of 7.60 × 1018 Hz. What is the wavelength in vacuum of these X-rays
In a head on collision, a car stops in .10 seconds from a speed of 14 meters per second. The driver has a mass of 70 kg, and is, fortunately, tightly strapped into his seat. What force is applied to driver by his seat belt during that fraction of ..
An uncharged capacitor is connected to a 55 V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin is then inserted between the plates.
a student standing on a train staiton observes that the pitch (frequency) of the train decreases from 888.8 Hz to 862.8 Hz, What is the speed of the train
A 76 g, 40-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 10 g ball of clay travelling horizontally at 2.70 m/s hits and sticks to the very bottom tip of the rod. To what maximum angle, measured fro..
A 10.0-g wad of sticky clay is hurled horizontally at a 110-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
A space station, in the form of a wheel 100m in diameter, rotates to supply an "artificial gravity" of 3.7m/s2 for persons who walk around on inner wall of the outer rim. Find out the rate of rotation of the wheel (in revolutions per minute) that ..
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