Answer:
arc welder involves use of plasma in technology
The device involves the use of plasma in technology is "arc welder"
What is plasma ?The 4th phase of matter, after solid, liquid, as well as gas, often been referred to as plasma. Inside a particular substance that is solid, liquid, or even gaseous, the electrons typically stick with almost the unique atomic nucleus.
What is arc welder?Using electricity to generate sufficient heat to dissolve metal as well as then allowing the melted metals to cool, arc welding would be a technique for joining metals together.
Arc welding employs the plasma technology principle because the gas would be ionized.
Therefore, the correct answer will be option (a).
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In which field(s) is knowledge about how science works important?
A. Medicine
B. All of these are correct
C. Law
D. Politics
E. Agriculture
Answer:B
Explanation:
convert 13.4 degrees celcius into kelvin
Answer:
286.55K
Explanation:
To convert to kelvin , add 237 .15
[tex]13.4\°C + 273.15 = 286.55K[/tex]
Answer:
13.4 degrees celsius =
286.55 kelvins
Temperature
13.4
Celsius
286.55
Kelvin
Formula
13.4°C + 273.15 = 286.55K
Explanation:
HOPE THAT HELPS YOU
❤ ❤ ❤ ❤ ❤ ❤ ❤ ❤
2. Report each of the following quantities to 3 significant figures. Use standard notation if possible, or
exponential notation if standard notation won't work.
a. 86,942
f. 56,018
b. 0.00621875
g. 0.003870
c. 107062.03
h. 15.9994
d. 4.00049
i. 12.011
e. 96
j. 2,000
Answer:
a. 86,942 = 8.69x10⁴
f. 56,018 = 5.60x10⁴
b. 0.00621875 = 6.22x10⁻³
g. 0.003870 = 3.87x10⁻³
c. 107062.03 = 1.07x10⁵
h. 15.9994 = 16.0
d. 4.00049 = 4.00
i. 12.011 = 12.0
e. 96 = 9.60x10¹
j. 2,000 = 2.00x10³
Explanation:
Hello,
In this case, rounding off each measurement to three significant figures, considering that if the fourth figure is five or more, the third one is rounded, we obtain:
a. 86,942 = 8.69x10⁴ (four places until the last digit and third digit is not rounded).
f. 56,018 = 5.60x10⁴ (four places until the last digit and third digit is not rounded).
b. 0.00621875 = 6.22x10⁻³ (three places until the first digit and third digit is rounded).
g. 0.003870 = 3.87x10⁻³ (three places until the first digit and third digit is not rounded).
c. 107062.03 = 1.07x10⁵ (five places until the last non-decimal digit and third digit is not rounded).
h. 15.9994 = 16.0 (those consecutive nines round the number to 16.0).
d. 4.00049 = 4.00
i. 12.011 = 12.0
e. 96 = 9.60x10¹ (exponential notation is needed since the number initially has two significant figures so an additional zero is added)
j. 2,000 = 2.00x10³ (three places until the last digit and third digit is not rounded).
Best regards.
Choose the answer that shows the following number correctly
written in scientific notation.
430,000
a 4.3 x 104
b 43 x 104
C 0.43 x 106
d 4.3 x 105
2. Chemical changes often cannot be reversed because they
produce new chemical substances.
TRUE
FALSE
Answer:
True
Explanation:
Answer:
True...
I’ve tooken a test like that before
An increase in temperature usually slows down a chemical reaction.
True or false? Because?
A decomposition occurs when you open a can or bottle of soda. Carbonic acid,H2CO3, is in carbonated beverages. It decomposes into carbon dioxide and water. If you leave an open soda can out for a long time, it loses its fizz. Which equation represents the balanced chemical equation for this reaction?
Answer:
H₂CO₃ (aq) → CO₂ (g) + H₂O (l)
Explanation:
Step 1: Write out unbalanced decomposition equation
H₂CO₃ (aq) → CO₂ (g) + H₂O (l)
Step 2: Balance equation
We see that we have 3 oxygens on both sides of the reaction.
We also see that we have 1 carbon on both sides of the reaction.
We also see that we have 2 hydrogens on both sides of the reaction.
Therefore, the chemical equation is balanced.
example for Conceptual
Answer:
The definition of conceptual is something having to do with the mind, or with mental concepts or philosophical or imaginary ideas. An example of conceptual is when you formulate an abstract philosophy to explain the world which cannot be proven or seen. "Conceptual."
Explanation:
The density of an element is 11.3 g/cm'. What is its density in kg/mº?
Answer:
11.3 g/cm³ = 11.3x100x100x100/ 1000 = 11300kg/m³
Explanation:
How many significant figures are in the following numbers?
a. 0.002849
b. 40030
b.) If the half-life of Carbon-14 is 5230 years and I start with 100 grams, how long will it take for the
Carbon-14 to decay to 3.125 grams?
Answer:
26150 years
Explanation:
First we need to determine the number of half lives -- not years -- it'll take for 100g (of any element) to decay to 3.125 g
First Half Life 100/2 = 50
Seconf Half Life 50/2 = 25
Third Half Life 25/2 = 12.5
Fourth Half Life 12.5/2 = 6.25
Fifth Half Life 6.25/2 = 3.125
So it'll take 5 half lives for 100g to decay to 3.125g.
If the Half Life of Carbon-14 is 5230 and it will take 5 half lives, to determine the number of years we just need to multiply 5*5230
5*5230 = 26150
This means that it will take 26150 years for 100g Carbon-14 to decay to 3.125g.
Hope this helps!
The charge on the cobalt ion in the salt CoO is ________.
Answer:
The charge of cobalt in the salt is + 2.
Explanation:
The charge of the salt = 0 . This is because it is neutral.
Charge of cobalt = ?
Charge of oxygen = -2 (This is a constant value, it is -2 only in peroxides)
Charge of salt = Charge of cobalt + Charge of oxygen
0 = x + (-2)
x = + 2
The charge of cobalt in the salt is + 2.
An object is a regular, rectangular, solid with dimensions of 2 cm by 3cm by 2cm. It has a
mass of 24 g. Find its density.
Answer:
2
Explanation:
Density = mass/volume
m=24
v=2*3*2=12
24/12=2
Answer:
[tex]\boxed {\tt d= 2 \ g/cm^3}[/tex]
Explanation:
Density can be found using the following formula.
[tex]d=\frac{m}{v}[/tex]
where [tex]m[/tex] is the mass and [tex]v[/tex] is the volume.
We know the mass is 24 grams. We must find the volume.
Since it is a rectangle, the volume can be found using the following formula.
[tex]v=l*w*h[/tex]
The length is 2 centimeters, the width is 3 centimeters and the height is 2 centimeters.
[tex]v= 2 \ cm * 3 \ cm * 2\ cm[/tex]
[tex]v= 6 \ cm^2 * 2\ cm[/tex]
[tex]v= 12 \ cm^3[/tex]
Now we know the volume, and can substitute it into the density formula.
[tex]d=\frac{m}{v}[/tex]
[tex]m= 24 \ g\\v= 12 \ cm^3[/tex]
[tex]d=\frac{24 \ g}{12 \ cm^3}[/tex]
[tex]d= 2 \ g/cm^3[/tex]
The density is 2 grams per cubic centimeter.
Question you have about rocks or minerals
List all the different ways we can use a model to represent things
5400 L to KL
With work??
Answer:
5.4KL
Explanation:
Divide by 1000
what is the Si base unit of mass?
what is the base unit/1000 of mass?
what is the base unit×1000 of mass?
what is the base unit of liquid volume? what is the base unit/1000?
what is the base unit×1000?
what is the base unit of temperature? what is the base unit/1000?
what is the base unit×1000?
The SI unit of temperature is the kelvin (K), which spans the same temperature change as the degree Celsius. The Kelvin scale is a thermodynamic scale, meaning that its zero point is at absolute zero rather than the freezing point of water. The second reference point for this scale as it is currently defined is the triple point of water, which is a unique point on the phase diagram of water (a specific combination of pressure and temperature) where ice, liquid water and water vapor are all in equilibrium. The triple point is assigned the temperature of 273.16 K.
The old centigrade scale used the freezing and boiling temperatures of water as its reference points, with one degree centigrade equal to 1/100 of the temperature span between the freezing and boiling points of water. The definition of the Kelvin scale was chosen to make the kelvin the same size as the centigrade degree.
The Celsius scale is defined in terms of the Kelvin scale but is equivalent to the old centigrade scale, which it replaces. It is convenient for reporting weather and cooking temperatures and so on, but is not particularly useful for scientific purposes. For instance, the behavior of gases which approximate ideal gases is such that at zero degrees C they experience a volume change of 1/273 for a one degree change in temperature. This observation provided one of the first indications for the value of absolute zero.
When using the ideal gas law:
PV = nRT
where P is pressure
V is volume
n is the quantity of gas in moles
R is a constant
T is the temperature
it is necessary to use a thermodynamic scale, usually Kelvin.
Another thermodynamic scale, the Rankine scale, has a relationship to the Fahrenheit temperature scale analogous to that between the Kelvin and Celsius scales.
Which of the following is true for all chemical reactions? The total mass of the reactants increase. The total mass of the products is greater than the total mass of the reactants. The total mass of the products is less than the total mass of the reactants. The total mass of the reactants equals the total mass of the products.
Answer:
The total mass of the reactants equals the total mass of the products.
Explanation:
The true statement for all chemical reactions is that the total mass of the reactants equals the total mass of the products.
What is chemical reaction?Chemical reactions are those reactions in which reactants react with each other and converted into products for the completion of the reaction.
Let us assume a chemical reaction:
A + B → C + D
Where, A & B are reactants which are converted into products C & D. Means mass of reactants will convert into the mass of products as it follows the law of conservation of mass.
So, total mass of the reactants equals the total mass of the products.
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Can someone help me with example #1 please
Answer: 343 K
Explanation:
To convert Celsius to Kelvin, you would add 273 to Celsius.
70°C+273=343 K
Now, we know that 70°C is 343 K.
Name some coping skills that can be used besides
nicotine vape and or vaping marijuana.
What are the characteristics for natural resources ?
Answer:
The characteristcs of natural resources are commercial and industrial use.
It includes soil, salt, oil, natural gas, coal, iron.
Draw the product formed when 2-butanol undergoes reaction with TsCl and Et3N. CH3C6H4SO2Cl.
Answer:
Explanation:
In organic chemistry, the reaction between 2-butanol with TsCl and Et3N is known as the tosylation of the alcohol hydroxyl group. Alcohol is being changed to tosylate by the use of tosyl chloride under the influence of a base. Tosylation of alcohol is an example of a nucleophilic substitution reaction. From the image attached below, we will see how the reaction between 2-butanol proceed into the product by using tosyl chloride and a base(Et3N).
what are we referring to when we talk about the position of an object
Explanation:
The location of a body with reference to a given point.
Estimate the volume of the football. Compare the football to the table tennis balls by dragging the football over the
table tennis balls to assess its size.
The mass of the tennis balls are 2.7(g)
Answer:
4,300
Explanation:
4,300..
Hope this helps ..Which is the formula mass of (NH4)2SO4?
0 96.07 amu
114.12 amu
O 116.17 amu
132.17 amu
Answer:
D. 132.17 amu
Explanation:
The formula mass of a compound can be determined from the formula of the compound thus, from the number each elements present. The formula mass of (NH₄)₂SO₄ is 132.17 amu.
What is formula mass?
Formula mass of a compound is the mass calculated from its formula. Each elements has a definite mass called its atomic mass expressed in g/mol or amu.
Mass number of an element is the sum of number of its protons and neutrons. The actual mass of an element is calculated with respect to the mass of 1/12th of Carbon-12 and it is called relative mass.
Here, the atomic mass of N = 14.006 amu
mass of H = 1.008 amu.
There are 4 hydrogen thus 4 × 1.008 = 4.008 u.
The mass of two units of NH₄ is = (14.006 + 4.008) × 2
= 36.028 u.
Atomic mass of sulfur = 32.6 amu
atomic mass of oxygen = 15.9 amu.
Thus for 4 oxygens = 15.9 × 4 = 63.6 u
The mass of SO₄ unit = 32.06 + 67.6 = 96.2u
Thus the total mass of (NH₄)₂SO₄ = 96.2 + 36.028
= 132.17 amu
Hence, the formula mass of (NH₄)₂SO₄ is 132.17 amu. Thus, option D is correct.
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the number of electrons in n=1 and n=2 shells of aluminum are
Answer:
n=1 holds two electrons and n=2 holds eight electrons.
Explanation:
Hello
In this case, since the atomic number of aluminum is 13, its electron configuration is:
[tex]Al^{13}: 1s^2,2s^2,2p^6,3s^2,3p^1[/tex]
In such a way, we can see that the level n=1 is filled with two electrons since the subshell s is able to hold two electrons and the level n=2 is also filled but with eight electrons as s holds two whereas p holds 6. Moreover, n=3 is holding three electrons.
Best regards.
Which coupling method is sensitive to temperature changes?
Answer:
Direct coupling
Explanation:
Direct coupling is sensitive to changes that occurs in temperature. It is electrical energy transfer using physical contact through a medium that is conductive.
It is useful in the interconnection of 2 circuits. This kind of coupling method can be done by a wire, a resistor or through mettalic bonding.
Which term describes the energy an object has because of its motion?
Answer:
kinetic
Explanation:
Consider this aqueous reaction.
HNO3(aq) + Ba(OH),(aq)
What is the formula for the salt that forms?
Answer:
Ba(NO3)2 barium nitrate
Explanation:
2HNO3+Ba(OH)2=Ba(NO3)2+2H2O
acid base salt water
What does the 2+ mean??