A skydiver drops himself from a plane, he passes 100 m before opening a parachute. If he experiences free fall motion, how much is his final speed at that point?.

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

Which statement correctly describes the relationship between frequency and wavelength?

In a system, when potential energy decreases, then entropy also decreases. true false