animallovr

Okay, so I am in physics and I have a question that should be very simple, but for some reason I seem to be over-thinking it. I would really appreciate someone else's brain power on this:

"Through experimentation you find gravity to be 9.7, 10.1, and 9.3 m/s^2. Find the percent error of each measurement."

I've already done that part, using 9.8 m/s^2 as the standard value for gravity, and I determined the % errors to be 1.02%, 3.06%, and 5.10%, respectively. The part I am having trouble with is this follow-up question, which asks:

"Given those values, are the results of the experiment...

a) Accurate but not precise

b) Precise but not accurate

c) Both precise and accurate

d) Neither

... and explain why."

Please correct me if I'm wrong, but I've ruled out b and c because I wouldn't consider the values to be extremely precise, since one is larger than the standard value and the other two are smaller. Mainly, I am having trouble determining their collective accuracy. In my mind, 5.10% error is pretty small when compared to 100%, and so I would call it accurate, but I could also argue that, compared to 1.02%, 5.10% seems pretty large, so they would be inaccurate. I guess I want to know what I should be determining their accuracy in reference to? And/or is there a defined % error value from which accuracy is always determined? If not, than is anyone able to explain this to me that would make it less... abstract?

Thank you.

"i" as in a imaginary number. Please show steps. Thank u so much!

I was late to driver's ed and so I have to do a worksheet for being tardy. I can't figure out the answer to this question: how should an intelligent driver regard a "near miss" in his/ her driving?

Ok, so I am 15 years old and have 2 little sisters (9 & 7) and they love to make noise! They always blast the TV, bang on the piano, and scream at the tops of their lungs! My bedroom is right above the room in the house that has the TV and my little sisters most of the time, but I have ADD and can't stand noise because I can't concentrate on more than 1 thing at a time and get huge headaches and can't get work done. I have spoken to my parents about this, but they say that I need to be less sensitive. I'm redesigning my room soon and am in desperate need of a way to soundproof it. tearing down walls/ ceilings/ floors/ windows and/or putting anything too noticeable is out of the question, and i've already asked my mom about carpet, but its too expensive. I NEED your advice on soundproofing my room, i've lived with this long enough!