Iron's ability to rust is not a physical property because

a. it cannot be observed.

b. the identity of iron stays the same.

c. a new substance with new properties is formed.

d. iron is magnetic

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.

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?