Atourist being chased by an angry bear is running in a straight line toward his car at a speed of 4.2 m/s. the car is a distance d away. the bear is 30 m behind the tourist and running at 6.0 m/s. the tourist reaches the car safely. what is the maximum possible value for d?

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 movement of electrons between atoms is called an

What part of the ear is names after tools, such as the hammer and the anvil?