Answer:
Light as a wave: Light can be described (modeled) as an electromagnetic wave. In this model, a changing electric field creates a changing magnetic field. This changing magnetic field then creates a changing electric field and BOOM - you have light. ... So, Maxwell's equations do say that light is a wave.
Explanation:
Hope this helps
Answer:
Light as a wave: Light can be described (modeled) as an electromagnetic wave. In this model, a changing electric field creates a changing magnetic field. This changing magnetic field then creates a changing electric field and BOOM - you have light. ... So, Maxwell's equations do say that light is a wave.
Explanation:
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B. water.
C. manganese.
D. petroleum.
Answer:
Option-B (water) is the correct answer.
Explanation:
Gas hydrates are made up of Solid-Ice water and a natural gas like Methane gas trapped in the lattice of ice water. Gas hydrates are mainly found deep down in the sea where the atmospheric pressure is greater than 1 atm.
Generally Gas hydrates have two main applications.
a) It stabilizes the sea floor other wise its melting will cause land sliding in sea floor.
b) Secondly, it traps a green house gases like Methane, if released these gases could produce Climate changes.
Answer:
B) water
Explanation:
Gas hydrates are essentially crystalline solid cage like structures in which small molecules are trapped in a network of frozen water molecules. The trapped gas molecules are usually methane which is a natural gas.
These methane hydrates are formed when methane and water combine under high pressure conditions usually prevalent in the ocean floors. Gas hydrates are also regarded as a powerful candidates for the production of cleaner energy.
2. Cr
3. Mg
4. Pb
Answer : The correct option is, (2) Cr (Chromium)
Explanation :
The reactivity series of metal are arranged of the reactivity from the highest to the lowest. Reactivity series is used to determine the products of the single displacement reactions. In the single displacement reaction, the most reactive metal displaces the least reactive metal.
From the given reactivity series we conclude that there are two metal (Mg and Cr) are more reactive metal than the Ni and there are two metal (Pb and Cr) are less reactive metal than the Zn. So, the Cr (Chromium) is the metal which is more active than Ni and less active than Zn.
Hence, the correct option is, (2) Cr
Answer: option (3) SrO, with 84.56%
Explanation:
You have to calculate the mass of strontium and the mass of the compound, for each of the four compounds, and compute the percent:
percent of strontium = (mass of strontium / mass of the chemical formula) × 100 %.
These are the atomic masses of the elements that you have to use:
Atomic mass of Sr: 87.62 g/mol
Atomic mass of Cl: 35.453 g/mol
Atomic mass of I: 126.904 g/mol
Atomic mass of O: 15.999 g/mol
Atomic mass of S: 32.065 g/mol
(1) SrCl₂:
i) mass of Sr: 87.62 g/mol
ii) mass of Cl₂: 2×35.453 g/mol = 70.906 g/mol
iii) mass of SrCl₂: 87.62 g/mol + 70.906 g/mol = 158.526 g/mol
iv) Sr % = [87.62 / 158.526 ] × 100 = 55.27%
(2) SrI₂
Following the same procedure:
i) Sr % = [87.62 / (87.62 + 2× 126.904) ] × 100 = 25.66%
(3) SrO
i) Sr % = [87.62 / (87.62 + 15.999) ] × 100 = 84.56%
(4) SrS
i) Sr % = [87.62 / (87.62 + 32.065) ] × 100 = 73.21%
Answer:
5w2
Explanation: