Someone please help! I just started chem and what’s an easy way to tell apart chemical and physical changes? For some reason I keep struggling with this :(

Chemical change is when the nature of something changes. Physical change is when a physical component changes.

Chemical change:

Example: Wood burns, it releases heat, produces CO2 and ash and you cannot reverse the burning.

Physical Change:

Example: Ice melts, water is formed, water can freeze again.

it's a simple answer :

Explanation:

Physical changes :

physical changes are those changes that can transform into a stage and have the ability to change himself to first stage .

Example: ice turns into water and water turns into a water vapour and again it becomes water and again becomes ice.

Chemical changes :

chemical changes are those changes which can transform into other products but cannot transform into his first stage .

Example: milk turns into curd but curd cannot turns into milk

the answer is 303.15 or 303

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)