What do we now understand to be the primary difference between normal galaxies and active galaxies?

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Which changes of state do the labels represent? a: b: c: