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Shkiper50 [21]
3 years ago
6

Manu buys two types of wires from a shop - one to put inside a heater as the heating element and the other to use as a fuse wire

for his table lamp. But, he mistakenly puts the fuse wire as the heating coil in a heater.
If the heater draws the same amount or higher amount of current when he switches on the heater, what will probably happen?



A The heater may overheat the room.

B The coil inside the heater may melt and break.

C The heater will start heating the room, but at a very slow pace.

D The coil inside the heater will become an electromagnet instead of heating.


with explanation
Chemistry
1 answer:
joja [24]3 years ago
7 0

There is a major difference in between heating wire and fuse wire

Heating wire has a very high melting point so it can be heated to very high temperature and due to its nature it withstand the temperature and does not melt. They are made up of high melting substance like nichrome.

Fuse has a very low melting point so it cannot be heated to very high temperature and due to its nature it cannot withstand the temperature and get melted easily. When used it melts when the current exceeds a certain limit. That is why it is used a protective aid. Made up of Magnesium etc.


So the correct answer is

the coil inside the heater may melt and break.

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Which state of matter does lightning represent?<br><br><br> Solid<br> Liquid<br> Gas<br> Plasma
andrey2020 [161]
<h2>Answer:</h2>

Plasma

<h2>Explanation:</h2>

Plasma is the stuff of lightning, flame and stars. Plasma is neither solid, liquid nor gas plasma is a fourth state of matter.

Plasma is when the electrons are "freed" from their host atoms for a short time, due to high temperatures. Fire is plasma, it responds to electric fields. Lightning is also plasma.

4 0
3 years ago
A chemist titrates 220.0 mL of a 0.1917M propionic acid (HC2H5CO2) solution with 0.1787 M KOH solution at 25°C. Calculate the p
natima [27]

Answer : The pH at equivalence is, 9.08

Explanation : Given,

Concentration of HC_2H_5CO_2 = 0.1917 M

Volume of HC_2H_5CO_2 = 220.0 mL = 0.220 L (1 L = 1000 mL)

First we have to calculate the moles of HC_2H_5CO_2

\text{Moles of }HC_2H_5CO_2=\text{Concentration of }HC_2H_5CO_2\times \text{Volume of }HC_2H_5CO_2

\text{Moles of }HC_2H_5CO_2=0.1917M\times 0.220L=0.0422

As we known that at equivalent point, the moles of HC_2H_5CO_2 and KOH are equal.

So, Moles of KOH = Moles of HC_2H_5CO_2 = 0.0422 mol

Now we have to calculate the volume of KOH.

\text{Volume of }KOH=\frac{\text{Moles of }KOH}{\text{Concentration of }KOH}

\text{Volume of }KOH=\frac{0.0422mol}{0.1787M}

\text{Volume of }KOH=0.00754

Total volume of solution = 0.220 L + 0.00754 L = 0.22754 L

Now we have to calculate the concentration of KCN.

The balanced equilibrium reaction will be:

HC_2H_5CO_2+KOH\rightleftharpoons C_2H_5CO_2K+H_2O

Moles of C_2H_5CO_2K = 0.0422 mol

\text{Concentration of }C_2H_5CO_2K=\frac{0.0422mol}{0.22754L}=0.1855M

At equivalent point,

pH=\frac{1}{2}[pK_w+pK_a+\log C]

Given:

pK_w=14\\\\pK_a=4.89\\\\C=0.1855M

Now put all the given values in the above expression, we get:

pH=\frac{1}{2}[14+4.89+\log (0.1855)]

pH=9.08

Therefore, the pH at equivalence is, 9.08

6 0
3 years ago
If the human body contains about 50 deciliters of blood, and the blood has about 15 grams of hemoglobin per deciliter, and all o
Tcecarenko [31]

Answer:

The blood will contain 750 grams of O2

Explanation:

Volume of blood in the human body = 15 deciliters

Mass of hemoglobin per deciliter of blood = 15 grams

Mass of hemoglobin in 50 deciliters of blood = 50×15 = 750 grams

Since all the hemoglobin molecules are saturated with O2, mass of O2 in the blood will be the same as mass of hemoglobin molecules in the blood.

Therefore, mass of O2 in the blood is 750 grams

6 0
3 years ago
Read 2 more answers
What is the pOH if the [H+] is 6.04x10-4M?
Margarita [4]

Answer:

10.78

Explanation:

-log(6.04x10^-4) = 3.22

14-3.22 = 10.78

- Hope this helps! Please let me know if you need further explanation.

7 0
3 years ago
Hey can someone pls help me answer these questions? It should be easy maybe. It’s just science. The question just won’t to know
miskamm [114]
Hehehehwgwgw. Be the hardest thing ever for a long day and I have a windows
6 0
3 years ago
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