PLS Help!! (1 Viewer)

[Lintalint9]

Hey guys! I have a problem that I don't understand. I don't know how to interpret this graph and hence find the velocity of the car - it is mainly I don't know how to interpret the direction and what the Velocity (m/s South means). Does it mean that the positive y-axis of the graph is now south and the negative axis of the graph is now North???


Also how do I find the instantaneous velocity at 6s for this question:


And this question makes no sense:

I did this:

But apparently it is wrong and the answer says this:

 

[yanujw]

Does it mean that the positive y-axis of the graph is now south and the negative axis of the graph is now North???

Yes

Also how do I find the instantaneous velocity at 6s for this question:

Area under the graph between 0 and 6 seconds. Be careful with the signs and direction when evaluating the answer.

But apparently it is wrong and the answer says this:

Answer looks horribly wrong. I believe what you are calculating is correct.

 

[jimmysmith560]

oh thank you so much, also just a chem question to spice things up
View attachment 35049

What is the answer to this? Like wth is it asking me to do. lol

I recall covering this in the Earth and Environmental Science Preliminary Course.

First, you need to determine the number of half-lives that will occur after 40 days, as follows:



Finding the fraction of a sample of this isotope that will be present after 40 days is as follows:

 

[Lintalint9]

THANK YOU!!!! My teacher didn't give any answers!!! Ahh.. literal saviours, the both of you