Because once you use oil you can not reuse it but the sun you can because it is always here and it has solar energy
Median plane - Sagittal plane through the midline of the body; divides the body or any of its parts into right and left halves.
Answer:
61.85 ohm
Explanation:
L = 12 m H = 12 x 10^-3 H, C = 15 x 10^-6 F, Vrms = 110 V, R = 45 ohm
Let ω0 be the resonant frequency.
ω0 = 2357 rad/s
ω = 2 x 2357 = 4714 rad/s
XL = ω L = 4714 x 12 x 10^-3 = 56.57 ohm
Xc = 1 / ω C = 1 / (4714 x 15 x 10^-6) = 14.14 ohm
Impedance, Z = 
Z = \sqrt{45^{2}+\left ( 56.57-14.14 )^{2}} = 61.85 ohm
Thus, the impedance at double the resonant frequency is 61.85 ohm.
Answer: A
The option A is the most accurate description of unknown gas density relative to other gases in the table.
Observe the table clearly and compare it with given density of unknown gas i.e., <em>0.0009 g/cm³ . </em>
In the table, it is given that
1. Hydrogen - 0.00009 g/cm³, which is less than 0.0009 g/cm³, because the value of hydrogen has four zeros after the decimal point on right side, (that is decimal zero places up to ten thousands) but when comparing the value of unknown gas, it has zeros up to thousands place only on right side.
Hence, while moving on right side of the decimal point, the number of zeros decreases the value of given number.
(0.00009 > 0.0009)
similarly observe the remaining values
2. 0.0009 > 0.00018 (Helium)
3. 0.0009 < 0.00122 (AIr)
4. 0.0009 < 0.00142 (Oxygen)
<em>So, answer is A. </em>
Answer:
20 neutrons
Explanation:
This will get you the mass number of the most abundant potassium isotope. You now know that the most abundant isotope of potassium contains 20 neutrons. All isotopes of potassium will have the same number of protons inside their nucleus, i.e. 19 protons.
I hope this helps you.
