Two sources of sound have intensities 1w/m2 and 0.001w/m2 and a distance of 1m. what is the difference in sound intensity level (sil) of these two sources?

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.

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

This is the substance(s) formed in a chemical reaction.