true / false: Volume is an unreliable measure of the quantity of matter.
true / false: Accuracy and precision have the same meaning.
An object weighs 39.36 newtons. What is its mass if a gravitometer indicates that g = 9.83 m/sec2?
the first two problems dont have spcific answers in my books and i have looked everywhere.
also can you tell me on the last one how to find the answer ive looked in my books but am having a hard time understanding it.
2007-06-26 11:42:06 · 7 answers · asked by bara_kiri 2 in Education & Reference ➔ Homework Help
Accuracy and precision are not the same thing. The number pie is approximately 3.14159. If I say that pie is 3 this number is accurate but not precise. It is accurate because I am simply stating that pie is closest to 3. I am saying nothing about it beyond that. It is imprecise because there is much fuzziness in my response. Pie could be as large as 3.4999 and as small as 2.500001. If I say that pie is 3.14 this number is accurate and more precise than 3. There is more precision because I have told you more about pie and there is less doubt about what number I'm talking about. If I told you pie was 3.0000000. This would be a very precise answer but not an accurate answer. It is precise because there is much information here but it its inaccurate because most of the information is wrong.
For the second one. W = mg. The weight is 39.36 newtons. G is 9.83 m/sec2. Just solve the equation.
2007-06-26 11:55:37 · answer #1 · answered by LG 7 · 1⤊ 0⤋
I'm not sure about these questions, but I think I'm correct. Volume is a reliable measure of matter. Accuracy and precision are not the same thing. To find the mass, 39.36 divded by 9.83m/sec2. Sorry if I'm wrong.
2007-06-26 11:59:36 · answer #2 · answered by WebMan 3 · 1⤊ 0⤋
True. Same volume of water at a higher pressure means more mass.
Hard to say, check a dictionary. I'd say no.
Divide 39.36 by 9.83. Force if mass by acceleration.
2007-06-26 11:51:39 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Just ask the Teach. Tell them your dilema and show them proof of your problem. They will be more able to give you better info since the crap is not in the book. If they dont help just protest the test and tell the principal that this is a unfair test. Thank you.
2007-06-26 11:46:56 · answer #4 · answered by Anonymous · 1⤊ 0⤋
I do believe that parents and the educational system that we pay so many taxes for should step up to the plate. All the answers you seek will not be given to you when you are on your own with no one to turn to!!!!!!! Most success comes from HARD WORK!!! Sorry I am 75, and do not feel you have worked hard enough yet to recieve the answers from me.................
2007-06-26 12:29:13 · answer #5 · answered by Knarf 5 · 0⤊ 0⤋
1. true. mass is more reliable
2.false. theyre different
3. mass= Kilograms
Newton= Kg(m)/ sec^2
to get mass:
N/Kg=m/sec^2
Kg=(m/sec^2) / N so
Kg=(9.83m/sec^2) / 39.36 N
Kg=.25 Kg
mass = 0.25 Kg
2007-06-26 13:42:48 · answer #6 · answered by Troy 2 · 0⤊ 0⤋
umm im really not sure, but i believe the first one might be false, because you should also find the mass....=\ not too sure though.
2007-06-26 11:45:53 · answer #7 · answered by shrimp 4 · 1⤊ 0⤋