Aperson on a bridge throws a rock stridht down toward the water. the rock has just been released. draw a free body diagram of the rock as t is being thrown with a coordinate system. write newton's 2nd laws for the rack a draw a free body diagram of the write newton's 2nd laws for the rock b. rock after it has been released with a coordinate system

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 branches of natural science include the study of an organism that lived 10 million years ago

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?