Answer:
7.5 × 10¹⁵ Hz
Explanation:
Given data
- Wavelength of the radio waves (λ): 40 nm = 40 × 10⁻⁹ m = 4.0 × 10⁻⁸ m
- Frequency of the radio waves (ν): ?
- Speed of light (c): 3.00 × 10⁸ m/s
We can determine the frequency of the radio waves using the following expression.
c = λ × ν
ν = c/λ
ν = (3.00 × 10⁸ m/s)/4.0 × 10⁻⁸ m
ν = 7.5 × 10¹⁵ s⁻¹ = 7.5 × 10¹⁵ Hz
Usually the presence of a dominant version of allele masks the expression of a recessive allele. A recessive allele is only phenotype is only expressed when 2 recessive alleles combine.
<u>Answer:</u>
<u>For a:</u> The reaction is a type of synthesis reaction.
<u>For b:</u> The reaction is a type of double displacement reaction
<u>For c:</u> The reaction is a type of combustion reaction.
<u>Explanation:</u>
The given chemical reaction is:
![Ca+Br_2\rightarrow CaBr_2](https://tex.z-dn.net/?f=Ca%2BBr_2%5Crightarrow%20CaBr_2)
The above reaction is a type of synthesis reaction because calcium and bromine are combining in their elemental state to form a calcium bromide compound.
The given chemical reaction is:
![Ca(OH)_2+2HBr\rightarrow CaBr_2+2H_2O](https://tex.z-dn.net/?f=Ca%28OH%29_2%2B2HBr%5Crightarrow%20CaBr_2%2B2H_2O)
The above reaction is a type of double displacement reaction because here exchange of ions takes place.
The given chemical reaction is:
![C_6H_{12}+9O_2\rightarrow 6CO_2+6H_2O](https://tex.z-dn.net/?f=C_6H_%7B12%7D%2B9O_2%5Crightarrow%206CO_2%2B6H_2O)
The above reaction is a type of combustion reaction because a hydrocarbon is reacting with oxygen gas to produce carbon dioxide and water molecule.
Answer:
The triple-beam balance can determine the weight, the ruler can be used to measure the length, width, and height of the book then multiply all by 3
Explanation: