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A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1020 Hz. The bird-watcher, however, hears a frequency of 1060 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
A cube of ice is taken from the freezer at -8.0 and placed in a 113 aluminium calorimeter filled with 306 of water at room temperature of 20.0. The final situation is observed to be all water at 15.0.
A 128 carton is pulled up a frictionless baggage ramp inclined at 30.0 above the horizontal by a rope exerting a 72.60 pull parallel to the ramp's surface. If the carton travels 5.20 along the surface of the ramp, compute the work done on it by the r..
In extremely cold weather conditions where the inside thermostat is set to 27 C and the outside temperature is -20 C, your 1200 square ft house might lose heat through the walls at a rate of 4000 W.
Two point charges totaling 7.00 µC exert a repulsive force of 0.100 N on one another when separated by 0.719 m. What is the charge on each? smallest charge largest charge (b) What is the charge on each if the force is attractive? smallest charge l..
What is the horizontal component of the ball velocity
A magnifying glass has a converging lens of focal length of 18.80cm. At what distance from a nickel must you hold this lens to get an image with a magnification of +2.47.
Two point charges are located on the axis as follows: charge = -2.00 at = -0.500 , and charge = 2.80 at the origin ( = 0). What is the magnitude of the net force exerted by these two charges on a third charge = 9.00 located at = 0.250?
A sample of gas (? = 1.5) is taken through an adiabatic process in which the volume is compressed form 1600 cc to 400 cc. If the initial pressure is 150 KPa, what is the final pressure? How much work is completed on the gas in process.
If the airplane somehow continues to fly as if nothing had happened, where is engine relative to the airplane at the moment the engine hits ground.
At what average rate does the force from the cable. A falling skydiver has a mass of 54.5 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has the magnitude that is equal to one-fourth of his weight.
The length of the mercury column is 4.0cm in pure melting ice and 28.0 cm in the steam. Compute the temperature for a length of 22.0.
What is the block's distance from equilibrium as the speed are 36 cm/s? What is block's position at t=1.0 s.
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