What happens to the speeds of the particles when thermal conduction is occuring within a solid? a. fast particles speed up, and slower ones slow down b. fast particles slow down, and slower ones speed up c. both fast particles and slow particles speed up d. both fast particles and slow particles slow down !

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Need this now! do pilots live long