What is the mechanical advantage of a steam engine that is going up a hill that is 50 feet long 100 feet high

What happens to atoms and chemical bonds during a reaction?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

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?