The answer is 0.492 because there are 100 meters in a hectometer, and 49.2/100 is 0.492
Answer: This is true because kinetic energy depends on speed. If there's no speed, then there is no kinetic energy.
Answer:
They expressed it as rate of change in concentration of reactants or products in a chemical reaction
Answer:
Chemical change
Step-by-step explanation:
A change in colour indicates that a new substance with different properties (colour) has been formed. This is a chemical change.
A. is <em>wrong</em>. A physical change does not usually cause a change in colour.
B. is <em>wrong</em>. No new gas or solid was formed,
C. is <em>wrong</em>. There is a colour change, not a temperature change.
