4. edna stands at the top of a tall cliff. she throws a stone upwards with an initial speed of 15 m/s. she then throws
a stone downwards with the same speed. both stones strike the ground below at the same location. neglecting air
resistance, which statement below is true?
a the stone thrown down will hit the ground with the greatest velocity.
b. the stone thrown up will hit the ground with the greatest velocity.
c. both stones will strike the ground with the same velocity.
d. both stones will strike the ground after being in the air the same amount of time.

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?

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums

The photo shows sugar dissolved into a solution with excess sugar at the bottom of the jar this type of solution is classified as a. unsaturated b. compound c. saturated d. plasma