Which of the following elements are in this unbalanced chemical reaction: Li
(s) + H20 (1) ► LIOH (aq) + H2 (g)?
Check all that apply
A. H20
B. H
C. O
D. LI

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?