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swat32
3 years ago
8

Pleassse help!!!

Chemistry
1 answer:
11111nata11111 [884]3 years ago
8 0

True

Explanation:

Harry Hess in 1961 resurrected Wegener's continental drift hypothesis and also he mantle convection idea of Arthur Holmes by postulating the theory of sea floor spreading.

  • After Wegener's postulation of the continental drift hypothesis, not much was done.
  • It was only around 1931 that Arthur Holmes came up with the idea of a convecting mantle.
  • After the second world war passed, new instruments were used to investigate and map the ocean floor.
  • Through this, Arthur Holmes came up with the idea of a spreading sea floor.
  • This gave a full gleam picture to the idea of a moving earth and the more accepted terminology of "Plate tectonics " came to the fore.

Learn more:

Sea floor spreading brainly.com/question/9912731

Continental drift brainly.com/question/5002949

#learnwithBrainly

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kari74 [83]

Answer:

Petroleum:92 Percent

Natural Gas:3 Percent

Renewable energy:5 Percent

Explanation:

US primary energy consumption by source and sector (2017)[17]

Supply sources Percent of source Demand sectors Percent of sector

Petroleum

36.2% 72% Transportation

23% Industrial

5% Residential and commercial

1% Electric power Transportation

28.1% 92% Petroleum

3% Natural gas

5% Renewable energy

Natural gas

28.0% 3% Transportation

35% Industrial

28% Residential and commercial

34% Electric power Industrial

21.9% 38% Petroleum

45% Natural gas

5% Coal

12% Renewable energy

Coal

13.9% 9% Industrial

<1% Residential and commercial

91% Electric power Residential and commercial

10.4% 16% Petroleum

76% Natural gas

<1% Coal

8% Renewable energy

Renewable energy

11.0% 13% Transportation

23% Industrial

7% Residential and commercial

57% Electric power Electric power

37.2% 1% Petroleum

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3 0
3 years ago
Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person or animal that ingests it.
kakasveta [241]

Answer:

The volume will be 89.6875 ml

Explanation:

So to count this we will use a single proportion.

0.0640 mol - 1000 ml

5.74×10−3 mol - x ml

x ml=5.74×10−3 mol*1000 ml/0.0640 mol=89.6875 ml

6 0
3 years ago
1.
Mazyrski [523]

1)   {ca}^{2 + }  = cation \\ {br}^{2 - }  = anion

7 0
3 years ago
Read 2 more answers
For about how long do scientists think wind and solar power can provide us with energy?
ivanzaharov [21]

Answer:

D

Explanation:

They are renewable energy sources

6 0
3 years ago
5) answer is A
Burka [1]

Answer:

A)  positive; added

Explanation:

Based on the reaction:

2NaHCO3(s) + 129kJ → Na2CO3(s) + H2(g) + CO2(g)

<em>2 moles of NaHCO3 requires 129kJ to produce 1 mole of Na2CO3, 1 mole of H2 and 1 mole of CO2.</em>

<em />

That means, the energy must be added being, thus, an exothermic reaction. The exothermic reactions have ΔH >0.

Thus, right answer is:

A)  positive; added

3 0
2 years ago
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