the free-electron density in a copper wire is 8.5×1028 electrons/m3. the electric field in the wire is 0.0660 n/c and the temperature of the wire is 20.0∘c. use the resistivity at room temperature for copper is rho = 1.72×10−8 ω⋅m.

Panthers and leopards prey on deer in an ecosystem. for unknown reasons, the population of leopards increased drastically. what are the likely effects of this change on the species? 1. more food for panthers and more competition for leopards 2. less food and more competition for panthers 3. fewer deer and more competition for panthers 4. more food for deer and less competition for panthers and leopards 5. more food for leopards and less competition for panthers

To safely control the traffic flow and protect workers near public roadways and moving construction equipment use you could use

Sweater originally priced at $65 is on sale for 15% off. you also have a coupon that takes another $10 off. what percent of the original price do you pay?