which part of earths interior is inferred to have convection currents that causes tectonic plates to move
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Answer:
Correct answer: B). Global climate is changing due to burning of fossil fuels and deforestation.
Forest holds a large amount of carbon, plants are known to absorb carbon dioxide from the atmosphere as they grow, that carbon dioxide is stored in plants in the form of carbon in plant's roots, leaves and in the soil. When trees are cut down, that stored carbon is released in the environment in the form of carbon dioxide, which accounts for approximately 18% of global greenhouse gas emission.
The burning of fossil fuel like coal, petroleum, oil, gas for the energy purpose is one of the major contributors for the rising level of carbon dioxide in the atmosphere, which leads to global warming and affect the climate.
Hence, the correct answer would be option B.
Explanation:
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What is the chemical reaction for respiration
Answers
The concept of significant figures are mainly used by scientist and engineer to know the significance of digits in a measurement. Therefore, significant figures gives an idea about the digits that are necessary to indicate the experimental value.
What is significant figures?
Significant figures are the figures that indicate the degree of accuracy of a value. It tells about the precision of a value.
Rules for counting significant figures are:
Number between 1 to 9 is always significant
Zeroes after a number has got no significance
Zeroes before a number has got no significance
Zeroes between number has got significance
34g 2significant figures
564l 3significant figures
19.3mm 3significant figures
23.45 mg 3significant figures
101 km 3significant figures
3400 g 2 significant figures
Therefore, significant figures gives an idea about the digits that are necessary to indicate the experimental value.
To learn more about Significant figures, here:
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Answers
Answer:
Explanation:
Given parameters:
Mass of ionic compound = 0.3257g
Mass of AgBr precipitate = 0.7165g
Unknown:
Percent mass of Br in the original compound.
Solution
The percent mass of Br in original compound =
Now we have to find the mass of Br⁻:
We must note that the same mass of Br⁻ would move through the ionic sample to form the precipitate.
Mass of Br in AgBr =
Mass of Br = x 0.7165
Mass of Br = 0.426 x 0.7165 = 0.305g
Percent mass of Br = x 100 = 93.7%
Answers
Negative phototropism in plants refers to the growth response of plant parts away from a light source. The part of a plant most likely to show negative phototropism is the roots.
Negative phototropism in plants refers to the growth response of plant parts away from a light source. This means that the plant part will grow in a direction where it receives less light.
Roots typically exhibit negative phototropism because they grow away from light sources. This behavior is advantageous for roots because they need to grow deeper into the soil to seek water, nutrients, and stability. By growing away from light, roots are guided towards a more favorable environment for their functions. In contrast, other parts of the plant, such as stems and leaves, often exhibit positive phototropism, where they grow towards light to optimize photosynthesis and energy production.
Learn more about phototropism from the link given below.
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Final answer:
The root of a plant is the part that is most likely to show negative phototropism.
Explanation:
The part of a plant that is most likely to show negative phototropism is the root.
Phototropism is the growth response of a plant to light, and negative phototropism means the plant grows away from the light.
The root grows downwards into the soil, away from the light, in order to anchor the plant and absorb water and nutrients.
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The time does not affect the amount of work.
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Answer:
The correct answer is "Oxidation at the anode and reduction at the cathode".
Explanation:
A rechargeable battery is recharged by the movement of electrons from an external power source into the battery. In order to achieve this, two process take place inside the rechargeable battery: oxidation at the anode and reduction at the cathode. The electrons flow within the battery from the anode to the cathode, this happens by the oxidation of the anode (loss of electrons) and the reduction at the cathode (gain of electrons).
Answers
pH=14-pOH
pOH=-log[OH⁻]
a) pOH=-log10⁻¹²
pOH=12
pH=14-12
pH=2
You can also use these equations:
[H⁺]=K(w)/[OH⁻] (K(w)=1.01×10⁻¹⁴)
pH=-log[H⁺]
b) [H⁺]=(1.01×10⁻¹⁴)/10⁻²M
[H⁺]=1.01×10⁻¹²M²
pH=-log(1.01×10⁻¹²)
pH=12
You can use either method. It does not really matter.
I hope this helps. Let me know if anything is unclear and when you do the calculations for c you should get pH=7.