Explorers on a small airless planet used a spring gun to launch a ball bearing vertically upward from the surface at a launch velocity of 12 m/sec. because the acceleration of gravity at the planet's surface was gs m/sec2, the explorers expected the ball bearing to reach a height of s=12−(1/2)gst2 m, t sec later. the ball bearing reached its maximum height 20 sec after being launched. what was the value of gs?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

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

The softest and hardest minerals are: softest hardest