Â· Prokaryotic cells that are present in the soil, air, water and in many humans body parts, such as the skin. 1  Reproduce by binary fission so that within a short time, the host can contain thousands of bacteria.  Produce toxins often as waste products, which harm the host.
The car is changing direction because of a force (supplied by friction between road and tires) directed toward the center of the curve. That is the centripetal force, which is always directed toward the center of the curve. When you swing a weight around your head at the end of a string, your hand supplies the centripetal force to keep the weight moving in a circle. Back inside the car, you feel a force pushing you AWAY from the center of the curve. That force is called centrifugal force, which is always equal in magnitude but opposite in direction from centripetal force. Answered by: Paul Walorski, B.A. Physics, Part-time Physics Instructor.
themselves have zero curvature. Large circles should have smaller curvature than small circles which bend more sharply. The (signed) curvature of a curve parametrized by its arc length is the rate of change of direction of the tangent vector. The absolute value of the curvature is a measure of how sharply the curve bends.