Well because we can use those elements for are own personal use like combining them to make better things like iron is in lots of things. Without knowing alot about the elements we wouldnt know how to use them
Answer: metal and carbonate
Explanation:
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions 
when dissolved in water and an acid is defined as a substance which donates hydrogen ions 
in water.
An acid is represented as :
1. When metal is treated with an acid such as 
, if the metal is more reactive than hydrogen displaces hydrogen from its salt solution and thus produce zinc chloride and hydrogen gas.
2. When carbonates are treated with acid, double displacement takes place ad carbon dioxide is released as a gas.
A compound is 2 or more substances chemically combined, mixtures arent
Hello,
Your brainliest answer would be:
1A. Both involve ion movements
1B. Passive transport moves ions from high concentration to low, using no metabolic energy.
2A. Both passive transport processes.
2B. Diffusion refers to the movement of any chemical from one place to another, whereas osmosis exclusively from one place to another.
Plz mark me brainliest!
Hope this helps!
Explanation:
The kinetic energy of translation
m= mass v= linear velocity
The kinetic energy of rotation
I= MOI of the thin walled sphere =kmR^2
where ω= v/R= angular velocity
Then
=1/k
solid sphere: k=0.4; E1/E2 =1/0.4 = 2.5;
hollow sphere: k=2/3; E1/E2 = 1.5
