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Reptile [31]
4 years ago
9

why are more firefighters needed to help hold the fire hose when the increase of water flow increases the force of the water

Physics
1 answer:
jasenka [17]4 years ago
4 0

Answer:

because the force of water coming out of the hose needs a stardy flow

Explanation:

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Orbit around hub and arms of spirals ( with name )
const2013 [10]
 the answer is the Spiral Galaxy
6 0
3 years ago
A 7.5 nC point charge and a - 2.9 nC point charge are 3.2 cm apart. What is the electric field strength at the midpoint between
Oduvanchick [21]

Answer:

Net electric field, E_{net}=91406.24\ N/C

Explanation:

Given that,

Charge 1, q_1=7.5\ nC=7.5\times 10^{-9}\ C

Charge 2, q_2=-2.9\ nC=-2.9\times 10^{-9}\ C

distance, d = 3.2 cm = 0.032 m

Electric field due to charge 1 is given by :

E_1=\dfrac{kq_1}{r^2}

E_1=\dfrac{9\times 10^9\times 7.5\times 10^{-9}}{(0.032)^2}

E_1=65917.96\ N/C

Electric field due to charge 2 is given by :

E_2=\dfrac{kq_2}{r^2}

E_2=\dfrac{9\times 10^9\times 2.9\times 10^{-9}}{(0.032)^2}

E_2=25488.28\ N/C

The point charges have opposite charge. So, the net electric field is given by the sum of electric field due to both charges as :

E_{net}=E_1+E_2

E_{net}=65917.96+25488.28

E_{net}=91406.24\ N/C

So, the electric field strength at the midpoint between the two charges is 91406.24 N/C. Hence, this is the required solution.

3 0
4 years ago
Balance the equation: ___ SiO2 + ___ HF  ___ SiF4 + ___ H2O
olga_2 [115]
Let's start from the Fluorine (F), which has 4 atoms on the right side: this means we must put a factor 4 in front of HF to balance the number of atoms of Fluorine. 
Nowe we have 4 atoms of hydrogen, H, on the left side. Since we have a H_2 on the right side (2 atoms), we must put a factor 2 in front of H_2 O, to balance the number of atoms of hydrogen.
So now the atoms of oxygen are also balanced (2 on both sides), as well as the atoms of Silicon (Si), so the balanced reaction is

Si O_2 + 4 HF \rightarrow SiF_4 + 2 H_2 O
3 0
3 years ago
solve the following system by any method 2x - 6y = 24 ... -5x + 6y = -6 ... A. (0,-6) B. (4,-1) C. (-6,-6) D. (6,-1)
vodka [1.7K]
Using elimination, the answer is C. 
5 0
4 years ago
A vegatable garden is 12 meters long by 7 meters wide.It is home to 168 mice.What is the population density of the mice?
chubhunter [2.5K]
Density= population/area
area= 12 X 7 = 84 m^2
density= 168/84= 2 mice per m^2
5 0
4 years ago
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