A gear running at 250‾rpm25 \overline{0} \mathrm{rpm}250rpm meshes with another revolving at 100‾rpm10 \overline{0} \mathrm{rpm}100rpm. How many teeth does the larger gear have, if the smaller gear has 30 teeth.
Write the condensed structural formula for each of the following compounds: N,N-dimethylbenzamide.
Hydrogen sulfide, H2 S\mathrm{H}_2 \mathrm{~S}H2 S, is a very weak diprotic acid. In a 0.10M0.10 \mathrm{M}0.10M solution of this acid, which of the following would you expect to find in the highest concentration? a.H2S\mathrm{H}_2\mathrm{S}H2S b.H3O+\mathrm{H}_3\mathrm{O}^+H3O+ c.HS−\mathrm{H}\mathrm{S}^-HS− d.S2−\mathrm{S}_2^-S2− c.OH−\mathrm{O}\mathrm{H}^-OH−
Three concentric, thin, long conducting cylindrical shells have radii of 2.00 mm,5.00 mm2.00 \text{~mm}, 5.00 \text{~mm}2.00 mm,5.00 mm, and 8.00 mm8.00 \text{~mm}8.00 mm. The space between the shells is filled with air. The innermost and outermost shells are connected at one end by a conducting wire. Find the capacitance per unit length of this configuration.