What’s the rest of the question or is that it?
Answer:
B Eight light-minutes
Explanation:
In the case when the distance separated earth and the sun so here we orbit the sun for a 150 million km distance and the light moves would be 300,000 kilometers per second
Now divide this
= 150 million ÷ 300,000 kilometers per second
= 500 seconds
This 500 seconds represent 8 minutes and 20 seconds
Hence, option B is correct
Here, Your answer would be option D) Voltage Source.
Charge flows from it in a particular direction, and a charge ( static or dynamic ) creates an electric field around it (can be experimentally observed by a test charge), whereas all the other options are appliances which needs current ( rate of flow of charge ) to work.
In short, Your correct Answer would be Option D)-Voltage Source.
Hope this helps!
Answer:
368224.29906 m/s
Explanation:
M = Mass of Polonium nucleus = 214 u
V = Velocity of nucleus
m = Mass of Helium nucleus = 4 u
v = Velocity of alpha particle = 
In this system the momentum is conserved

The recoil speed of the nucleus that remains after the decay is 368224.29906 m/s
The sensors are located in the carotid sinus and in the aortic arch