SUBJECT: PHYSICS FOR ENGINEERS

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10.The mass of a proton is about 1.007276 u. Convert this number into grams and picograms. The radius of a proton is about 1 fm, Calculate the density of the proton in g/cm3 11.Scientists believe that continental drift in the Atlantic Ocean happens at the rate of about 1 to 2 cm/year. Convert this rate into nm/s. 12A cell of baker's yeast is typically 4.0 mm in diameter. (Assume that the cells are spherical, although they have a variety of shapes.) If you had 18 mL of yeast (i.e., about one tablespoon), about how many cells would it contain? 13.An electron microscope indicates that a rectangular object has dimensions of 2.50 mm by 4.75 mm. What is the area of this object in m2, expressed in scientific notation? 14.The active area of the A8 processor found in some Apple smartphones has the equivalent of about 2.0 billion transistors (the transistor is a semiconductor device that controls electronic processes). The dimensions of the integrated circuit chip are approximately 9.3 mm x 9.6 mm. What are the dimensions of one transistor on the integrated circuit, assuming all of the area is transistors, and each is a square? 15.Volunteers are searching a wooded area for a piece of forensic evidence. It is estimated that searchers should use a grid with a separation no larger than 4.0 m between searchers and that the searchers average a walking speed of 0.25 mls. How long would it take a search party of 10 people to search an area of 1 kmz