Describe why, when running a current though a solenoid (stacked loops of wire), the solenoid produces a magnetic field

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic