You measure a block of wood and find that it has the following dimensions: 2.3 cm × 2.3 cm × 4.7 cm. What is the volume of the block of wood? Round your answer to the appropriate number of significant figures.

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.

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

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