QUESTIONNAIRE
1. Find the length of the hypotenuse of a triangle if the other sides are 3’ and 4’ respectively?
2. What is the sale price if the cost price of a Pen is Rs. 100/- and I want to make a profit of 40% on the sale price.?
3. The combined age of Father - Son is 40 years, and after 10 years the son will be half the age of the Father. Find the age of the Father and Son?
4. What is 17.5% of 280 ?
5. What is the Square Root of 361? and Calculate 9 to the power of 3 ..
6. What is Hard Water?
7. What is scaling ?
8. What is Boyle’s Law?
9. How does an Air Conditioner work?
10. Which is heavier – 1 Kg of Steel or Kg of Iron?
11. Why does Water in clay cool if the jar is kept out in the Sun?
12. What is Global Warming and what gases cause it?
13. What is Power Factor?
14. How is Power Factor Correction Done?
15. What are true and apparent Power measurement units?
16. What are the odd harmonics in electrical circuit?
17. Complete the following:
Answers
Answer:
ask one by one u can get answers
This problem is solved using the Pythagorean theorem (a2+b2=c2). In this formula a and b are the legs of the right triangle while c is the hypotenuse.
Using the labels of our triangle we have:
o2+a2=h2
\{100} h^{2}=(10ft)^{2} +(17ft)^{2}
h2=100ft2+289ft2
h=389ft2−−−−−√
→19.7ft
Example of your 1 question..
It is simple mathematics. If the cost of a product is Rs 80 and if you sell them for Rs 100, then the profit is Rs 20 (Sale price less cost price). If the profit is calculated as a % of cost, then it will be Rs 20 / Rs 80 = 25%. If the profit is calculated as a % of sales, then it will be Rs 20 / Rs 100 = 20%.
Example of your 2nd question..
Answer: Son is 15 and father is 55.
To solve this problem, find a suitable age that is three times older or younger than the other one, depending on which age you want to find first.
Then, you get the difference and it must be 40 years.
Assume b is the son’s age after 5 years.
The father’s age will be 3b.
3b - b = 40
2b = 40
b = 20
After 5 years, son will be 20 and the father will be 60.
You subtract each age with 5 and you will get their present ages.
Son’s present age = 20 - 5 = 15
Father’s present age = 60 - 5 = 55
Answer of your 3rd question..
17.5% of 280
= 49
Answer of your 4th question...
The 2nd root of 81, or 81 radical 2, or the square root of 81 is written as 81−−√2=81−−√=±9.
The 2nd root of 25, or 25 radical 2, or the square root of 25 is written as 25−−√2=25−−√=±5.
The 2nd root of 100, or 100 radical 2, or the square root of 100 is written as 100−−−√2=100−−−√=±10.
The 2nd root of 10, or 10 radical 2, or the square root of 10 is written as 10−−√2=10−−√=±3.162278.
Example of your 5th question..
Hard water is water that has high mineral content. Hard water is formed when water percolates through deposits of limestone, chalk or gypsum which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.
Answer of your 6th question..
“Scaling” in Research. Definition: Scaling is the procedure of measuring and assigning the objects to the numbers according to the specified rules. In other words, the process of locating the measured objects on the continuum, a continuous sequence of numbers to which the objects are assigned is called as scaling.
Answer of your 7th question...
Boyle's law, also referred to as the Boyle–Mariotte law, or Mariotte's law, is an experimental gas law that describes how the pressure of a gas tends to increase as the volume of the container decreases.
Answer of your 8th question..
The air conditioner in a central heating and cooling system provides cool air through ductwork inside your home, by providing a process that draws out the warm air inside, removing its heat. ... From that point, the condenser or outdoor unit then turns the refrigerant vapor back into a liquid, removing any heat.
Answer of your 9th question...
Upthrust will be more for the cotton as it will have a larger surface area per unit of apparent weight due to the lower density. So every 1 kg apparent weight is somewhere near 1.1 kg actual weight of cotton. And 1kg Iron actually weighs near 1.09 Kg. Therefore, Cotton is heavier!
Answer of your 10th question...
In an earthen pot, water gets evaporated quickly through the pores. Cooling is caused by evaporation. Some heat energy is utilised during the process of evaporation. Since this energy is taken from the water itself, it leads to a lowering of temperature in the remaining amount of water.
Answer of your 11th question...
One of the first things the IPCC concluded is that there are several greenhouse gases responsible for warming, and humans emit them in a variety of ways. Most come from the combustion of fossil fuels in cars, buildings, factories, and power plants. The gas responsible for the most warming is carbon dioxide, or CO2.
Answer of your 12th question..
In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power absorbed by the load to the apparent power flowing in the circuit, and is a dimensionless number in the closed interval of −1 to 1.
Answer of your 13th question..
Power factor correction is achieved by the addition of capacitors in parallel with the connected motor or lighting circuits and can be applied at the equipment, distribution board or at the origin of the installation.
Answer of your 14th question..