Discover Questions

Complete combustion of 8.70 g of a hydrocarbon produced 26.7 g of CO2 and 12.7 g of H2O. What is the empirical formula for the hydrocarbon? Show that the straight lines whose
direction cosines are given by the equations ul+vm+wn = 0 and al2+bm2+cn2 = 0
are
(a) perpendicular? Find four consecutive integers such that the difference between the largest and the smallest equals three times the third integer. Find #s? A cube has sides of length 2m. B is at the center of one face, and A is an opposite vertex. Find the distance from A to B.? If antenna is fed with pulsed DC instead of AC at its resonant frequency, how efficient will it be?