The acceleration should be a gain of 2 km/h per second
Answer:
B. Tomatos reflect red light
Explanation:
The only reason colors exist is because the objects with color reflect all other light except for what they are portrayed as. White reflects all colors, and black absorbs all colors.
If you have any questions feel free to ask :)
Answer:
![+1.11\mu C](https://tex.z-dn.net/?f=%2B1.11%5Cmu%20C)
Explanation:
A charge located at a point will experience a zero electrostatic force if the resultant electric field on it due to any other charge(s) is zero.
is located at the origin. The net force on it will only be zero if the resultant electric field intensity due to
and
at the origin is equal to zero. Therefore we can perform this solution without necessarily needing the value of
.
Let the electric field intensity due to
be +
and that due to
be -
since the charge is negative. Hence at the origin;
![+E_2-E_3=0..................(1)](https://tex.z-dn.net/?f=%2BE_2-E_3%3D0..................%281%29)
From equation (1) above, we obtain the following;
![E_2=E_3.................(2)](https://tex.z-dn.net/?f=E_2%3DE_3.................%282%29)
From Coulomb's law the following relationship holds;
![-E_3=\frac{kQ_3}{r_3^2}](https://tex.z-dn.net/?f=-E_3%3D%5Cfrac%7BkQ_3%7D%7Br_3%5E2%7D)
where
is the distance of
from the origin,
is the distance of
from the origin and k is the electrostatic constant.
It therefore means that from equation (2) we can write the following;
![\frac{kQ_2}{r_2^2}=\frac{kQ_3}{r_3^2}.................(3)](https://tex.z-dn.net/?f=%5Cfrac%7BkQ_2%7D%7Br_2%5E2%7D%3D%5Cfrac%7BkQ_3%7D%7Br_3%5E2%7D.................%283%29)
k can cancel out from both side of equation (3), so that we finally obtain the following;
![\frac{Q_2}{r_2^2}=\frac{Q_3}{r_3^2}................(4)](https://tex.z-dn.net/?f=%5Cfrac%7BQ_2%7D%7Br_2%5E2%7D%3D%5Cfrac%7BQ_3%7D%7Br_3%5E2%7D................%284%29)
Given;
![Q_2=?\\r_2=2.5cm=0.025m\\Q_3=-2.18\mu C=-2.18* 10^{-6}C\\r_3=3.5cm=0.035m](https://tex.z-dn.net/?f=Q_2%3D%3F%5C%5Cr_2%3D2.5cm%3D0.025m%5C%5CQ_3%3D-2.18%5Cmu%20C%3D-2.18%2A%2010%5E%7B-6%7DC%5C%5Cr_3%3D3.5cm%3D0.035m)
Substituting these values into equation (4); we obtain the following;
![\frac{Q_2}{0.025^2}=\frac{2.18*10^{-6}}{0.035^2}\\\\hence;\\\\Q_2=\frac{0.025^2*2.18*10^{-6}}{0.035^2}\\](https://tex.z-dn.net/?f=%5Cfrac%7BQ_2%7D%7B0.025%5E2%7D%3D%5Cfrac%7B2.18%2A10%5E%7B-6%7D%7D%7B0.035%5E2%7D%5C%5C%5C%5Chence%3B%5C%5C%5C%5CQ_2%3D%5Cfrac%7B0.025%5E2%2A2.18%2A10%5E%7B-6%7D%7D%7B0.035%5E2%7D%5C%5C)
![Q_2=\frac{0.00136*10^{-6}}{0.00123}=1.11*10^{-6}C\\\\Q_3=+1.11\mu C](https://tex.z-dn.net/?f=Q_2%3D%5Cfrac%7B0.00136%2A10%5E%7B-6%7D%7D%7B0.00123%7D%3D1.11%2A10%5E%7B-6%7DC%5C%5C%5C%5CQ_3%3D%2B1.11%5Cmu%20C)
Province. Is what is located away from the capital.
Answer:
60 meters
Explanation:
If you are going 3 meters in a second, and you are traveling for 20 seconds, you have to multiply
3meters/second*20seconds
cross out the seconds and you have
3 meters*20
60 meters