Total volume of all the cavities in the casting
An iron casting containing a number of cavities weighs 5.70E+3 N in air and 3.74E+3 N in water. What is the total volume of all the cavities in the casting? The density of iron (that is, a sample with no cavities) is 7.87 g/cm3.
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What is the pressure in the top floor pipe. Pressures are gauge pressures. Give your answer to the nearest tenth of a kPa.
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A radio trasmitter of frequency f0 is placed at a distance 7.61 e8 m from the center of Zog. Calculate the fractional change in frequency &Delta f/fo that would be observed a long distance from the star.
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