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A model of a golf ball is to be studied to determine the effects of the dimples. A sphere 10 times larger than an actual golf ball is used in the wind tunnel study. What speed should be selected for the model to simulate a prototype speed of 50 m=s?
A 107 ball is tied to a string. It is pulled to an angle of 4.20 and released to swing as a pendulum. How long is the string
If the far end of the iron rod is in an ice bath at 0°C, find the rate of heat transfer passing from the boiling water to the ice bath. Suppose there is no heat loss to the surrounding air.
A 77 kilogram person stands on a scale in an elevator. Find what does the scale read when the elevator is at rest
what will be the frequency of vibrations. At one instant a bicyclist is 70m due east of a park's flagpole, going due south with a speed of 15m/s. Then, 19s later, the cyclist is 65m due north of the flagpole, going due east with a speed of 14 m/s.
A wire is stretched between two posts. Another wire is stretched between two posts that are four times as far apart. What would be the speed of the wave on the longer wire
A sample of an unknown material appears to weigh 285 N in air and 180 N when immersed in alcohol of specific gravity 0.700. What is the density of the material
At rest, a car's horn sounds the note A (440 Hz). The horn is sounded while the car is moving down the street, What is the speed of the car
A coin is located 22.0 cm to the left of a converging lens (f = 16.0 cm). A second, identical lens is placed to the right of the first lens, such that the image formed with the combination has the same size and orientation as the original coin. Disco..
Caluculate the radius of the path of this electron if itsvelocity is erpendicular to the magnetic field
A 22.5-mW laser beam of diameter 1.98 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
a circular roller coaster has radius 30 m. The speed at the bottom is 37.0 m/s. What does it read in kilograms at the top of the ride
Kathy buys a sports car that can accelerate at the rate of 4.9 m/s/s. She decides to test the car by racing with her friend Stan. At what time does Kathy overtake Stan
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