Which of the following are indicators of chemical changes(choose all that apply):
1.A solid is formed
2.Heat is released or absorbed
3.A gas is released
4.Light or Sound is Produced
5.State of Matter changes
6.A color change takes place
7. The texture/luster changes
8.Size changes

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

What equation is used to calculate the weight of an object on a plant ?