The visible light has wavelength in therange 400 - 700 nano-meters. The wavelengths longer than visible light are: 1-Infrared waves (used in ringtone/mobile waves)2-microwaves -used to heat and cook food. 3- Radiowaves - used in communication
KE = 1/2mv^2
m = 2000
v = 30m/s
1/2*2000*30^2=
1000*900 = 900,000kgm^2/s^2
The best technique to separate an insoluble solid from a liquid is filtration. Filtration is a process that separates solids from liquid by adding a medium, such as a filter paper, that only liquid can pass, and what is left behind the filter paper is the insoluble solid.
<span>Assuming that everything remains constant, after one million years, Mount Marshak would be 5.1km tall. This is because the mountain would be uplifted by 1.3km after a million years but also eroded 1.5km after a million years. The difference is 0.2km in the direction of erosion. This means the mountain would be 0.2km smaller than it was before. 5.3-0.2=5.1.</span>
Answer:
The van der wall forces are existed between separate molecules of water but not between the hydrogen and oxygen molecules.
Explanation:
<em>Van der wall forces include repulsion and attraction between the atoms, surfaces and molecules.</em> <em>The intermolecular forces are also included in the van der wall forces. Basically, van der wall forces are the forces that are formed between molecules of the same molecules but not with the different molecules of the same substance.</em> Take water molecules into consideration,<em> van der wall forces exist between the water molecules but these forces are not associated between hydrogen and oxygen molecules. </em>These forces are fragile than ionic bond and covalent bond.