Answer:
There is no chemical combination of the substances in a mixture, so they retain their physical properties. There is the same composition throughout a homogeneous mixture. The structure of a heterogeneous mixture differs.
Explanation:
Answer:Momentum
Explanation:
Product of an object mass and velocity is called Momentum. Basically momentum is the measure of mass in motion . More is the mass more will be the momentum and similar applies for velocity.
For example a bus moving with low velocity can have a same momentum as that of a bullet moving with a very high velocity
Momentum is denoted by Symbol P
It's a negative value because the negative sign on the spring's force means the force exerted opposes the spring's displacement
Answer:
The chemist is incorrect because a catalyst increases the rate of reaction only.
Explanation:
A catalyst is a substance in the presence of which the speed of the reaction increases. It plays no role in the chemical change taking place.
Thus, if the two compounds are not chemically reacting, a catalyst wont make it happen either.
A chemical reaction occurs when atoms tend to lose or gain electrons. A catalyst has no role to play in this process.
