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.

Jasmine thinks that andrea is responsible for posting embarrassing pictures of her on the internet and sending them around the school. jasmine finds andrea before school and starts yelling at her about taking the pictures down. andrea pushes jasmine. what should jasmine do first?

Raul has one solution that is 20% acid by volume and one solution that is 50% acid by volume. he plans to mix together some of each solution to create 30 milliliters of a solution that is 40% acid by volume. how many milliliters of the 20% acid solution should raul use to create the 40% acid solution? can someone explain this to me? i know that the answer is 10 milliliters, but i don't know how to get it.

The point on the celestial sphere directly above an observer's head is called the