[ Answer ]
It would be very confusing and date and calculations would be off and inaccurate
[ Explanation ]
If scientists didn't use the SI system, then all the calculations and data they would send to each other would be mixed up and confusing. If Americans used one metric system and The Chinese used another metric system, converting the data would be inaccurate and take way to much time. Everyone would have their own idea for what is right, and no one would have a clue what other people meant.
<> Arsenal <>
<span>Which of the following has a fixed shape?
- solid iron</span>
A rock falls from a cliff. 19.6 m is its displacement after 2 seconds
Answer: 19.6 m
<u>Explanation:
</u>
The rock falling from the cliff falls under the effect of gravity. And as it falls, the initial velocity is zero. To calculate the displacement of the rock which fell from the cliff, after 2 seconds, use the equation of motion, as follows,
We know that 2nd equation of motion,
![s=u x t+\frac{1}{2} a x t^{2}](https://tex.z-dn.net/?f=s%3Du%20x%20t%2B%5Cfrac%7B1%7D%7B2%7D%20a%20x%20t%5E%7B2%7D)
Given that t=2 sec and u=0. Putting the values into the equation, we get,
![s = (0 \times 2)+\frac{1}{2}(9.8 \times 2 \times 2) = 9.8 \times 2 = 19.6 m](https://tex.z-dn.net/?f=s%20%3D%20%280%20%5Ctimes%202%29%2B%5Cfrac%7B1%7D%7B2%7D%289.8%20%5Ctimes%202%20%5Ctimes%202%29%20%3D%209.8%20%5Ctimes%202%20%3D%2019.6%20m)
Answer:
149.05J
Explanation:
Hello,
Data;
Weight = 12N
x = 80miles
Radius of the moon = 1079.4mi
W = mg
But gravity at moon = ⅙ the gravity on earth
12 = ⅙ × m
M = 2kg
Mass of the module = 2kg
K = F.x
F(x) = k / x²
2 = k / (1079.4)²
k = 2.33×10⁶
Work = ∫f.dx
work = ∫₁₀₇₉.₄¹¹⁵⁹ . (2.33×10⁶/x²).dx
Work = (-2.33×10⁶) ×(¹/₁₁₅₉ - ¹/₁₀₇₉)
work = 149.05J
Light is either potential energy or kinetic.