Answer: 
Explanation:
We have the following equation:
We have to find 
this means we have to isolate it:
The major organs of the respiratory system are the lungs
Answer:
force exerted by Jet pack is 63 N on the astronaut
Explanation:
As per Newton's II law we know that
Rate of change in momentum of the system is net force on it
so we have
so we have
so we have
Since he used jet pack to return back towards the spaceship
so here we will have
force exerted by Jet pack is 63 N on the astronaut
Explanation:
Position-time graphs measure/express the position of a skater over time relative to the start or finish of the race (depends on how it is used). Note: are the skaters in line vertically or horizontally? Like is one directly behind the other or are they next to each other?
If the two skaters are in line horizontally with each other, then their position will be the same relative to the start or finish of the race. This means if one passes the other one, the position would be different for all times after they pass. On the graph, it would look like one single line at the start (as position is same) which splits into 2 (representing the new difference in position due to 1 passing the other.
If the two skaters are in line vertically, their lines on the graph will appear parallel to each other (assuming they are going same speed) because the position is changing at the same rate, one is just reaching the same point after the other. If the skater behind overtakes the one in front. The lines on the graph will cross and continue either in parallel but with the other line on top to represent the moment where their position is the same right before they pass and after, where the second skater is now in front.
Hope this helped!
