Answer:296.76 N
Explanation:
Given
mass of box 
Let 
be the Tension in left side and 
be the Tension in the right side
From diagram
and
![T_2\left [ \tan 80\cdot \cos 65+\sin 65\right ]=100\cdot g](https://tex.z-dn.net/?f=T_2%5Cleft%20%5B%20%5Ctan%2080%5Ccdot%20%5Ccos%2065%2B%5Csin%2065%5Cright%20%5D%3D100%5Ccdot%20g)
![T_2=\frac{100\cdot g}{\left [ \tan 80\cdot \cos 65+\sin 65\right ]}](https://tex.z-dn.net/?f=T_2%3D%5Cfrac%7B100%5Ccdot%20g%7D%7B%5Cleft%20%5B%20%5Ctan%2080%5Ccdot%20%5Ccos%2065%2B%5Csin%2065%5Cright%20%5D%7D)
<span>1.37 m/s
Assuming her initial velocity is totally horizontal and her vertical velocity is only affected by gravity, let's first calculate how much time she has until she reaches the ledge 8.00 m below her.
d = 1/2AT^2
8.00m = 1/2 * 9.8 m/s^2 * T^2
Solve for T
8.00 m = 4.9 m/s^2 * T^2
Divide both sides by 4.9 m/s^2
1.632653061 s^2 = T^2
Take square root of both sides
1.277753 s = T
So we now know that she has 1.277753 seconds in which to reach a horizontal distance of 1.75 m. So how fast does she need to be going?
1.75 m / 1.277753 s = 1.369592 m/s
Since we only have 3 significant figures in our data, round the result to 3 figures giving 1.37 m/s</span>
The oxygen atom, before it gains these two electrons, has a neutral charge, meaning that it has as many protons as electrons. After it gains 2 electrons, it has 2 more electrons than protons. Each electron has a charge of -1, so the whole molecule will have a charge of -2. The correct answer is a)!
Answer:
3.90 m/s
Explanation:
add the two vectors using pythagoras.
