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Bad White [126]
3 years ago
14

(100 points) Imagine that the ability to cool materials down to below 200 K (–100° F) was not discovered until 1950. Which techn

ology would that have most impacted?
electromagnetism
crystallography
metallurgy
superconductivity
Chemistry
2 answers:
REY [17]3 years ago
6 0

Answer:

D

Explanation:

got it right. :)

umka2103 [35]3 years ago
4 0

Answer: (D) Superconductivity

Explanation: Edge 2021

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What is the identity of the element, and how many neutrons does it have? An elements most stable ion forms an ionic compound wit
Pani-rosa [81]

Answer:

B. CA, 14

Explanation:

Atoms of elements contain small particles known as electrons, neutrons, and protons. The nucleus of an atom is made up of neutrons and protons which are at the center of the atom. Electrons on the other hand surrounds the nucleus. Electron has negative charge while proton has a positive charge. The number of neutrons is equivalent to the number of protons . In addition, the number of protons is equal to mass number minus the number of electrons.

For the compound XCl_{2}, it can be broken down into X^{2+} and 2Cl^{-}. Its ion has a mass of 34 and 18 electrons which means it has already lost 2 electrons.

Therefore:

For the given element, the number of electrons is 18+2 = 20 electrons.

The number of protons = 34 - 20 = 14.

And the number of neutrons is 14.

Only option B has the correct answer.

6 0
3 years ago
When designing an experiment, the first step is to. ______. Group of answer choices a. hypothesis b. list a procedure c. state t
True [87]

Answer:

A

Explanation:

It's the scientific method

8 0
3 years ago
A piece of iron is heated with a torch to a temperature of 603 k.
Mazyrski [523]
This question asks to compare the energy emitted by a piece of iron at T = 603K with the energy emitted by the same piece at T = 298K.

Then you need to use the Stefan–Boltzmann Law

That law states that energy emitted (E) is proportional to fourth power of the  to the absolute temperature (T), this is E α T^4 (the sign α is used to express proportionallity.

Then E (603) / E (298) = [603K / 298K]^4 = 16,8

Which meand that the Energy emitted at 603 K is 16,8 times the energy emitted at 298K.


5 0
3 years ago
Two scientists did the same experiment but arrived at different results. The results would most likely be ?
schepotkina [342]

Answer:

They did not have accurate data and information.

5 0
3 years ago
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Why can’t the calvin cycle run if the light reactions don’t occur?
zysi [14]

Answer:

Because the Calvin cycle is dependent on the the product from light reaction.

Explanation:

The Calvin cycle is the light independent phase of photosynthesis during which carbon is fixed. This step requires energy generated during the light dependent phase of the photosynthesis.

Hence, if the light dependent reaction does not occur, the required energy to drive carbon fixation will be lacking and the Calvin cycle will not be able to proceed.

3 0
3 years ago
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