Answer:
Liquid water and ethanol are described as miscible because they <u>mutually dissolve each other in all proportions</u>.
Explanation:
Miscibility is defined as the property of two substances to mix each other in all proportions and make a homogenous mixture. This physical property is a reversible property and mainly depends upon the intermolecular interactions between the two substances.
Water: Water has a chemical formula H₂O, in which hydrogen atom is directly bonded to oxygen atom. Oxygen atom being more electronegative atom make the hydrogen partial negative and the oxygen itself becomes partial negative.
Ethanol: Ethanol has a chemical formula C₂H₅OH. In this molecule there is also the presence of O-H bond as that found in water and with the same partial negative charges.
Thus, the opposite partial charges of these molecules interact with each other and forms one of the strongest intermolecular bonds called as Hydrogen Bonds resulting in dissolution of each other in all proportions.
Answer: Tall fescue can be harmful to grazing cattle and horses because the grass can become tough and infected with endophytes, causing poor grazing. Switchgrass and tall fescue are less likely to be poisonous to dogs, cats or humans than to horses or cattle, but eating either of them might cause stomach upset.
Explanation:
D. Earthquake
This is because all the others are landforms.
Answer:
Copy and paste "Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f. Visible light has a wavelength range from ~400 nm to ~700 nm. Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz. Red light has a wavelength of ~700 nm, and a frequency of ~4.3*1014 Hz." into google, and the correct website pops up as the first result.
Explanation:
I tried to link the website that I use to convert wavelengths and frequencies into types of light, but it deleted my answer, so I guess we're doing it this way. As for converting the wavelength to energy, the same principles apply as before:
Frequency: ν Wavelength: λ Energy: E Speed of light: C (3.00e8) Planck's Constant: h (6.626e-34)
ν -> λ λ = C/ν
λ -> ν ν = C/λ
For either of these equations, wavelength must be converted to meters or nanometers, depending on the equation.
For ν -> λ, after doing the equation, convert the wavelength into nanometers by dividing by 1e-9.
For converting λ -> ν, convert the wavelength into meters by multiplying by 1e-9.
For energy: E = hν = hc/λ
