Answer:
ummmm probably.... inaction or inactivity
The movement of fluid as a result of differential heating or convection. Earth convection currents refer to the motion of molten rock in the mantle as radioactive decay heats up magma, causing it to rise and driving the global scale flow of magma.
Because the molecules that move freely begin to compact closer together, with less heat, means less molecular activity.
Answer:
150000000000 m
0.0000005 seconds
33.33 ns
Explanation:
Speed of electromagnetic waves through vacuum = ![3\times 10^8\ m/s](https://tex.z-dn.net/?f=3%5Ctimes%2010%5E8%5C%20m%2Fs)
Echo time = 1000 seconds
Echo time is the time taken to reach the object and come back to the observer
Distance = Speed×Time
![Distance=3\times 10^8\times \frac{1000}{2}=150000000000\ m](https://tex.z-dn.net/?f=Distance%3D3%5Ctimes%2010%5E8%5Ctimes%20%5Cfrac%7B1000%7D%7B2%7D%3D150000000000%5C%20m)
Venus is 150000000000 m away from Earth
Time = Distance / Speed
![Time=\frac{75}{3\times 10^8}=0.00000025\ seconds](https://tex.z-dn.net/?f=Time%3D%5Cfrac%7B75%7D%7B3%5Ctimes%2010%5E8%7D%3D0.00000025%5C%20seconds)
Echo time will be twice the time
![Echo\ time=2\times 0.00000025=0.0000005\ seconds](https://tex.z-dn.net/?f=Echo%5C%20time%3D2%5Ctimes%200.00000025%3D0.0000005%5C%20seconds)
The echo time will be 0.0000005 seconds
Difference in time = Difference in distance / Speed
![\Delta t=\frac{\Delta d}{v}\\\Rightarrow \Delta t=\frac{10}{3\times 10^8}\\\Rightarrow \Delta=33.33\ ns](https://tex.z-dn.net/?f=%5CDelta%20t%3D%5Cfrac%7B%5CDelta%20d%7D%7Bv%7D%5C%5C%5CRightarrow%20%5CDelta%20t%3D%5Cfrac%7B10%7D%7B3%5Ctimes%2010%5E8%7D%5C%5C%5CRightarrow%20%5CDelta%3D33.33%5C%20ns)
The accuracy by which I will be able to measure the echo time is 33.33 ns
6 3/7 * 1 5/9
45/7 * 14/9
630/63
10