A sample started with 100 atoms of Element X. Sample X has a Half-Life of 5 years. If there are only 6 atoms of Element X left in the sample, how old is the sample, and how many Half-Lives have occurred? To answer the question, select the age of the sample AND the number of Half-Lives that have occurred.

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

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?

If a simple machine reduces the strength of a force, what must be increased?