Spiders may "tune" strands of their webs to give enhanced response at frequencies corresponding to the frequencies at which desirable prey might struggle. orb web silk has a typical diameter of 0.0020 mm, and spider silk has a density of 1300 kg/m^3. to give a resonance at 140 hz , to what tension must a spider adjust a 13 cm long strand of silk?
express your answer to two significant figures and include the appropriate units.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.