Answer:
Option D = 3.4 g/mL
Explanation:
Given data:
Volume of water = 21.2 mL
Volume of water + object = 27.8 mL
Mass of object = 22.4 g
Density of object = ?
Solution:
First of all we will calculate the volume of object.
Volume of object = Volume of water+ object - volume of water
Volume of object = 27.8 mL - 21.2 mL
Volume of object = 6.6 mL
Density of object:
d = m/v
d = 22.4 g/ 6.6 mL
d = 3.4 g/mL
<span>Carbohydrates, Proteins, Lipids and Nucleic Acids
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Answer:
The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling. A water molecule is slightly charged on both ends. This is because oxygen is more electronegative than hydrogen
Answer:
![\sqrt{ \frac{2.3 *10^{-28} }{F} }](https://tex.z-dn.net/?f=%5Csqrt%7B%20%5Cfrac%7B2.3%20%2A10%5E%7B-28%7D%20%20%20%20%20%7D%7BF%7D%20%7D)
Explanation:
Total force = Force due to gravity + Force due to charges
Total force = ![\frac{GMm}{r^{2} } + \frac{kQq}{r^{2} }](https://tex.z-dn.net/?f=%5Cfrac%7BGMm%7D%7Br%5E%7B2%7D%20%7D%20%2B%20%5Cfrac%7BkQq%7D%7Br%5E%7B2%7D%20%7D)
r is the separation between particles.
Charge of a proton(Q) = - (charge of an electron(q) ) = 1.6 * 10^-19 coulombs
Mass of a proton (M)= 1.67×10^-27 kilograms
Mass of an electron (m) =9.11 × 10^-31 kilograms
G=6.67 ×10^−11 N⋅m^2/kg^2
k=8.99 * 10 ^9 N.m^2 / C^2
Plugging in values:
Force due to gravity= (6.67 *10^−11)(1.67 * 10^-27)*(9.11 * 10^-31) /r^2 =1.01 * 10^-67 / r^2
Force due to charges : (8.99 * 10 ^9)*(1.6 * 10^-19)*(1.6 * 10^-19) / r^2 = 2.3 *10^-28 / r^2
We can observe that force due to charges is too large as compared with force due to charge. The ratio of Fc to Fm is 2.3* 10^39. It means that we can ignore force due to gravity.
Total force = Force due to charges.
F = 2.3 *10^-28 / r^2
r = ![\sqrt{ \frac{2.3 *10^{-28} }{F} }](https://tex.z-dn.net/?f=%5Csqrt%7B%20%5Cfrac%7B2.3%20%2A10%5E%7B-28%7D%20%20%20%20%20%7D%7BF%7D%20%7D)