Answer:
Zeros to the left of a decimal can be insignificant place holders, such as in 0.043 (two significant figures).
They can be significant if they are between two digits who themselves are significant, such as in 101.000 (three significant figures).
In the case of a number like 1,000 we can see there is only one significant figure. The zero digits are not between sigfigs.
Because pH can unballence the are it is not good for are health
Answer:
the forces are proportional to their areas of application
Explanation:
In a hydraulic jack, Pascal's principle is used, that the pressure in an incompressible liquid is the same at the same height, whereby the pressure on both sides of the jack are the same
P₁ = P₂
the pressure is defined by
P = F / A
we substitute
F₂ =
therefore the force is F₂> F₁
Therefore the forces are proportional to their areas of application
Answer:
Planet Y
Rx = 1.587 Ry
Explanation:
Tx = 290 days
Ty = 145 days
Let the semi major axis of planet X is Rx and of plant Y is Ry.
According to the Kepler's third law of planetary motion
![\frac{T_{x}^{2}}{T_{y}^{2}}=\frac{R_{x}^{3}}{R_{y}^{3}}](https://tex.z-dn.net/?f=%5Cfrac%7BT_%7Bx%7D%5E%7B2%7D%7D%7BT_%7By%7D%5E%7B2%7D%7D%3D%5Cfrac%7BR_%7Bx%7D%5E%7B3%7D%7D%7BR_%7By%7D%5E%7B3%7D%7D)
![\frac{290^{2}}{145^{2}}=\frac{R_{x}^{3}}{R_{y}^{3}}](https://tex.z-dn.net/?f=%5Cfrac%7B290%5E%7B2%7D%7D%7B145%5E%7B2%7D%7D%3D%5Cfrac%7BR_%7Bx%7D%5E%7B3%7D%7D%7BR_%7By%7D%5E%7B3%7D%7D)
![4=\frac{R_{x}^{3}}{R_{y}^{3}}](https://tex.z-dn.net/?f=4%3D%5Cfrac%7BR_%7Bx%7D%5E%7B3%7D%7D%7BR_%7By%7D%5E%7B3%7D%7D)
![1.587=\frac{R_{x}}{R_{y}}](https://tex.z-dn.net/?f=1.587%3D%5Cfrac%7BR_%7Bx%7D%7D%7BR_%7By%7D%7D)
Rx = 1.587 Ry
So, planet Y is closest to star.
<span>D. People need to have the ability to protect themselves and their homes.</span>