you are responsible for ensuring that everyone is safe during a lab using chemicals. What precautions do you take before starting the lab?

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.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply