The church is 2 km north from Mika’s home. What is his velocity if it takes him 30 minutes to reach the church in
km/h?

Answers

What? i dont understand the question
Solutions

a solution is a homogeneous mixture of two or more components. the dissolving agent is the solvent. the substance which is dissolved is the solute. the components of a solution are atoms, ions, or molecules, which makes them 10-9  m or smaller in diameter.

example:   sugar and water

suspensions

the particles in suspensions are larger than those found in solutions. components of a suspension can be evenly distributed by a mechanical means, like by shaking the contents, but the components will settle out.


example: oil and water


more examples of suspensions

colloids

particles intermediate in size between those found in solutions and suspensions can be mixed such that they remain evenly distributed without settling out. these particles range in size from 10-8  to 10-6  m in size and are termed colloidal particles or colloids. the mixture they form is called  a colloidal dispersion. a colloidal dispersion consists of colloids in a dispersing medium.

example: milk

mire examples of colloids

more dispersions

liquids, solids, and gasses all may be mixed to form colloidal dispersions.

aerosols: solid or liquid particles in a gas.
examples: smoke is solid in a gas. fog is a liquid in a gas.

sols: solid particles in a liquid.
example: milk of magnesia is a sol with solid magnesium hydroxide in water.

emulsions: liquid particles in a liquid.
example: mayonnaise is  oil in water.

gels: liquids in solid.
examples: gelatin is protein in water.

quicksand is sand in water.

telling them apart

you can tell suspensions from colloids and solutions because the components of suspensions will eventually separate. colloids can be distinguished from solutions using the  tyndall effect. a beam of light passing through a true solution, such as air, is not visible.

light passing through a colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible.

4 km/hr

Explanation:

Speed=\frac{Distance}{Time}

           



Do you know the answer?

Other questions on the subject: Science

Science, 28.10.2019, calmaaprilgrace
Please go to the link below. i've already provided an answer there. hope it helps!...Read More
1 more answers
Alcohols are organic molecules assembled from carbon (C), oxygen (O), and hydrogen (H) atoms. When 2 carbons are present, the alcohol is called ethanol (also known as ethyl alcohol...Read More
2 more answers
The best-supported theory of our universe's origin centers on an event known as the big bang. This theory was born of the observation that other galaxies are moving away from our o...Read More
1 more answers