You are waiting for your friend to give you a ride on his new motorcycle. As your friend pulls up the driveway, the brakes squeal loudly. You get on, and then your friend steps on the gas. As the motorcycle accelerates, the engine roars loudly. The high-pitched squeal of the brakes was caused by sound waves, and the equally loud but low-pitched roar of the engine was caused by sound waves.

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 pressure proportional to the area a- inversely b- directly c- increase d-decrease

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not