Sound waves are not able to travel in a vacuum, sound requires a medium such as air or a solid for example. Satellites are indeed in space, but radio waves are not sound waves they are a form of light. Light can travel in a vacuum so the messages that satellites beam back to Earth are light waves not sound waves, that is why it is possible.
Answer:
i think 53 or 56
Explanation:
cause i cross multiplied and got that
Explanation:
Given that,
Charge 1, ![q_1=-5.45\times 10^{-6}\ C](https://tex.z-dn.net/?f=q_1%3D-5.45%5Ctimes%2010%5E%7B-6%7D%5C%20C)
Charge 2, ![q_2=4.39\times 10^{-6}\ C](https://tex.z-dn.net/?f=q_2%3D4.39%5Ctimes%2010%5E%7B-6%7D%5C%20C)
Distance between charges, r = 0.0209 m
1. The electric force is given by :
![F=k\dfrac{q_1q_2}{r^2}](https://tex.z-dn.net/?f=F%3Dk%5Cdfrac%7Bq_1q_2%7D%7Br%5E2%7D)
![F=9\times 10^9\times \dfrac{-5.45\times 10^{-6}\times 4.39\times 10^{-6}}{(0.0209)^2}](https://tex.z-dn.net/?f=F%3D9%5Ctimes%2010%5E9%5Ctimes%20%5Cdfrac%7B-5.45%5Ctimes%2010%5E%7B-6%7D%5Ctimes%204.39%5Ctimes%2010%5E%7B-6%7D%7D%7B%280.0209%29%5E2%7D)
F = -492.95 N
2. Distance between two identical charges, ![r=0.0209\ m](https://tex.z-dn.net/?f=r%3D0.0209%5C%20m)
Electric force is given by :
![F=\dfrac{kq_3^2}{r^2}](https://tex.z-dn.net/?f=F%3D%5Cdfrac%7Bkq_3%5E2%7D%7Br%5E2%7D)
![q_3=\sqrt{\dfrac{Fr^2}{k}}](https://tex.z-dn.net/?f=q_3%3D%5Csqrt%7B%5Cdfrac%7BFr%5E2%7D%7Bk%7D%7D)
![q_3=\sqrt{\dfrac{492.95\times (0.0209)^2}{9\times 10^9}}](https://tex.z-dn.net/?f=q_3%3D%5Csqrt%7B%5Cdfrac%7B492.95%5Ctimes%20%280.0209%29%5E2%7D%7B9%5Ctimes%2010%5E9%7D%7D)
![q_3=4.89\times 10^{-6}\ C](https://tex.z-dn.net/?f=q_3%3D4.89%5Ctimes%2010%5E%7B-6%7D%5C%20C)
Hence, this is the required solution.
The answer for the given question above would be the third option. Carbon dioxide absorbs the most heat energy during SUBLIMATION. By definition, sublimation is <span>the transition of a substance from the solid to the gas phase without passing through the intermediate liquid phase. Hope this answers your question.</span>
Answer:
0.64 m
Explanation:
The first thing is calculate the center of mass of the system.
![X_{cm}= \sum_{n=1}^{n}\frac{X_n\times M_n}{M_n}](https://tex.z-dn.net/?f=X_%7Bcm%7D%3D%20%5Csum_%7Bn%3D1%7D%5E%7Bn%7D%5Cfrac%7BX_n%5Ctimes%20M_n%7D%7BM_n%7D)
now multiplying every coordinate x by the mass of each object (romeo, juliet and the boat) and dividing all by the total mass taking by reference the position of juliet.
![X_{cm}=\frac{53\times0 +81\times2.7+79\times1.35}{53+81+79}](https://tex.z-dn.net/?f=X_%7Bcm%7D%3D%5Cfrac%7B53%5Ctimes0%20%2B81%5Ctimes2.7%2B79%5Ctimes1.35%7D%7B53%2B81%2B79%7D)
X_cm = 1.4589 m
When the forces involved are internals, the center of mass don't change
After the movement the center of mass remains in the same distance from the shore, but change relative to the rear of the boat.
![X_{cm}=\frac{79\times1.35+(81+53)\times2.7}{53+81+79}](https://tex.z-dn.net/?f=X_%7Bcm%7D%3D%5Cfrac%7B79%5Ctimes1.35%2B%2881%2B53%29%5Ctimes2.7%7D%7B53%2B81%2B79%7D)
X_cm= 2.10 m
this displacement is how the boat move toward the shore.
2.10-1.46= 0.64 m