3. An external cost is one that is associated with the use of a good or service but is not include II
its initial cost. The combustion of fossil fuels like coal and oil release impurities associated with
the fuels into the atmosphere. These impurities can impact the environment and human healt
by damaging the surface of plants or impacting human respiratory health. Which of these
actions would best address the issue of externalities not being included in the costs of fos
fuels?

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

Which radioisotope is used in dating geological formations?

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.