Atwo-spindle drill simultaneously drills a ½-in hole and a ¾-in hole through a workpiece that is 1.0 in thick. both drills are twist drills with point angles of 118°. the cutting speed for the material is 300 ft/min. the rotational speed of each spindle can be set independently. the feed rate for both holes must be set to the same value because the two spindles feed at the same rate. the feed rate is set so the total metal removal rate of both drills does not exceed 1.50 in3/min. determine (a) maximum feed rate (in/min) that can be used, (b) individual feeds (in/rev) for each hole, and (c) cutting time to drill the holes.

The law of reflection states that the angle of reflection is equal to the angle of

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Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.