
1. As you increase speed is there an increase or decrease in Kinetic Energy?

2. As you increase mass is there an increase or decrease in Kinetic Energy?
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3. As you decrease speed is there an increase or decrease in Kinetic Energy?

4. As you decrease mass is there an increase or decrease in Kinetic Energy?

Answer:
B) Heat is given off.
Explanation:
When heat is given off, a chemical change must have occurred and such a reaction is termed an exothermic reaction.
A chemical change is one in which;
- the process is not easily reversible
- leads to the production of new kinds of matter
- involves change in mass
- requires a considerable amount of energy.
Most chemical reactions are accompanied by heat changes.
Answer: The products of electrolysis are Zn(l) and
gas
Explanation:
Electrolysis of a subastance is breaking it into its constituents by the action of electrical current.
In the electrolysis of molten zinc chloride, zinc metal is produced at the cathode which is a negative electrode and chlorine gas produces as the anode which is a positive electrode.
At anode :
At cathode : 
Answer:
Image result for What materials are needed to find density of water
Calculate the density by dividing the mass by the volume.
Using the equation density = mass/volume, you can determine the density of water. Plug in the values of mass and volume you determined and solve.
Explanation: