Download A Science Teacher’s Companion to the BBC Microcomputer by P. Hawthorne PDF

By P. Hawthorne

ISBN-10: 0333382854

ISBN-13: 9780333382851

ISBN-10: 0333390946

ISBN-13: 9780333390948

ISBN-10: 1349076449

ISBN-13: 9781349076444

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UNTIL loop. It ends at line 440 if five attempts have been made or if the target has been hit. Calculates and prints, to 1 decimal place, the percentage accuracy of shooting so far. Input mass of gunpowder (M) and verify that it is in an acceptable range. Increments number of shots fired. Gunfire sound. Calculates muzzle velocity. It is assumed that the chemical energy of the powder is fully converted to kinetic energy of the shell. Hence the muzzle velocity (U) is proportional to the square root of the mass of powder (M).

54 A Science Teacher's Companion to the BBC Microcomputer 1460 PROCsure provides the operator with a chance to change his mind if he has chosen to exit the program, perhaps by mistake before saving the data. 1520 PROCsave opens a file and records the data currently stored in the memory. 1650 PROCget_data is used to read in a file of data recorded during a previous session.

If the new length is less than the old length we will move backwards from the old length to the new length (negative STEP), drawing across the scale cf the meter in colour 0, so the reading is erased back to 'newlen%'. Otherwise we move forward and draw in colour 3 to extend the reading up to 'newlen%' - see lines 2220-2250. FNcont_review calls 'FNgetkey' and returns a FALSE value if 'c' or 'c' is pressEd and a TRUE value if 'R' or 'r' is pressed. ) FNmenu returns a numeric value in the range 1 to 7, obtained in lines 2850-2870.

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