Arock is thrown up into the air. it reaches the apex of it's flight and falls back down to the earth. at the top of the rock's flight, what is rock's acceleration?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?