Technician a says that the presence of oil around a fitting of an air-conditioning line may indicate an oil leak but not a refrigerant leak. technician b says that using an electronic leak detector is the best way to find the source of a refrigerant leak. who is correct

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.)

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2

Which is the most accurate name for the ionic compound cas?