All of the following are evidence that a chemical reaction has occurred except . a new substance formed
a new substance formed

a change in temperature occurred
a change in temperature occurred

gas bubbles form
gas bubbles form

matter changes state

28. a stone is projected at a cliff of height h with an initial speed of 42.0 mls directed at angle θ0 = 60.0° above the horizontal. the stone strikes at a, 5.50 s after launching. find (a) the height h of the cliff, (b) the speed of the stone just before impact at a, and (c) the maximum height h reached above the grou

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending