Rubbing water (isopropyl alcohol) has lesser surface tension than that water.
Water possesses a surface tension of 72 dynes/cm.
Whereas rubbing alcohol has a surface tension of 23 dynes/cm.
<h3>what is surface tension?</h3>
Surface tension is the propensity of liquid surfaces at rest to shrink to the smallest possible surface area.
Because the atoms on the outside of the molecules (often hydrogens) lack strong hydrogen bonding capabilities, most organic liquids have very low surface tensions. Because isopropanol contains just 28%, OH and the remainder is CH or CH3, the linkages that hold a droplet together are few and far between.
The only substance with a higher surface tension than water is liquid mercury (450 dyne/cm).
Learn more about surface tension here:
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Answer:
Work done W 2.938*10^9 J
Explanation:
given data:
mass m = 944 Kg
Mass of moon M = 7*10^22 Kg
Radius of the moon R = 1.5*10^6 m
gravitational constant G = 6.67*10^{-11} Nm^2/Kg^2
we know that work done is given as
Work done 
= 2.938*10^9 J
Answer:
Predicting the size, location, and timing of natural hazards is virtually impossible, but now, earth scientists are able to forecast hurricanes, floods, earthquakes, volcanic eruptions, wildfires, and landslides using fractals.
Explanation:
consider the motion in vertical direction
v = initial velocity in the vertical direction = ?
v' = final velocity in the vertical direction at the highest point = 0 m/s
a = acceleration due to gravity = - 9.8 m/s²
h = maximum height = 12.2 m
Using the kinematics equation
v'² = v² + 2 a h
0² = v² + 2 (- 9.8) (12.2)
v = 15.5 m/s
let assume that velocity of launch be v₀
θ = angle of launch = 13
vertical component of the velocity of launch is given as
v = v₀ Sinθ
15.5 = v₀ Sin13
v₀ = 69 m/s
<span>The correct answer is C. 60. A more precise answer would be around 70, but this is the closest one we have. As a matter of fact, 50% of the net income is made by only 5% of companies, while the remaining US corporations raise the bar to around 70. These 5% are mostly conglomerates that deal in all areas of business, from food to cosmetics to furniture.</span>
