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17 articles trouvés pour ce sujet.

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	isomorphisme		2000-08-10
		Romain Kroes pose la question : Pour les beoins d'un ouvrage d'économie que je suis en train de terminer, pouvez-vous me dire qui est (sont) l'inventeur de l' "isomorphisme" en mathématiques (calcul tensoriel)? Claude Tardif lui répond.
	The inverse square law		2018-06-05
		Amy pose la question : Question about inverse square law ; Hi, I'm trying to understand some nuances about this law and have been reading about it a lot online and trying out some homework for personal interest (hobby ) - not school related. I understand that the simple formula is ; 1/d^2 I was wondering about what appears to be an oddity to me, that I came across when I was working with a test example I found at this link ; http://www.softschools.com/formulas/physics/inverse_square_law_formula/82/ The problem that caught my interest was this one on that page ; "1) If a bright flashlight has a light intensity of 15.0 candela at a distance 1.00 m from the lens, what is the intensity of the flashlight 100.0 m from the lens?" So I have a few different questions about this, but the most important one is, what does it mean if we replace the "1" in ; 1/d^2 with a different value such as a ratio in the form of a decimal value, so instead we have something like this ; 0.75/d^2 ??? Does this ratio represent a curve then? I am thinking that the "1" in the normal formula represents a straight line Some of the links I was researching ; http://wisptools.net/book.php?c=3&s=2 http://www.softschools.com/formulas/physics/inverse_square_law_formula/82/ https://www.nde-ed.org/GeneralResources/Formula/RTFormula/InverseSquare/InverseSquareLaw.htm Penny Nom lui répond.
	The tens digit of a number is five times the unit digit		2016-05-19
		sanjeev pose la question : The tens digit of a number is five times the unit digit. Find the number? Penny Nom lui répond.
	A two digit number		2015-08-21
		Cameron pose la question : Write the 2 digit number that matches the clues. My number has a tens digit that is 8 more than the ones digit. Zero is not one of my digits. My number is ________. Penny Nom lui répond.
	A two digit number		2011-03-01
		jhoanna pose la question : the sum of the digits of a two digit number is 10. The value of the number is 16 times the units digit.Find the number. Penny Nom lui répond.
	The tens digit of 0! + 1! + 2! + 3! + 4! .............+9999! + 10000!		2009-01-23
		Kaylyn pose la question : determine the tens digit for the expression: 0! + 1! + 2! + 3! + 4! .............+9999! + 10000! Robert Dawson and Penny Nom lui répond.
	Girls, cats and kittens		2008-05-16
		leria pose la question : There are 7 girls in a bus. Each girl has 7 backpacks In each backpack, there are 7 big cats For every big cat, there are 7 little cats. How many legs are there in the bus? One hint? it's a 6 digit number Penny Nom lui répond.
	Women, cats and kittens		2008-02-12
		Paige pose la question : There are 7 women on a bus. Each has a backpack. In each backpack there are seven cats. Each cat has seven kittens. How many legs are there total on the bus? Penny Nom lui répond.
	Tens and ones		2007-09-16
		julia pose la question : My son has come home with a math question "what i know about 10s and 1s" we're totally stumped any information you can provide would be greatly appreciated Harley Weston lui répond.
	The tens digit		2007-08-21
		Arul pose la question : Hi.. Please help me on this question.. Sequence 2, 7, 22,…after the first three terms, each term is three times the previous term plus 1, a(n+1)=3an + 1. What is the sum of tens digit 33rd and tens digit of the 35 term? Penny Nom lui répond.
	The tension in a single strand of wire		2007-08-13
		Gene pose la question : Seeking an equation that calculates the tension in a single strand of wire or rope. Conditions: the wire is fixed at both ends, A known weight is suspended from the center of the span. The weight will dipslace the strand downward some distance Y. Let the distance between the fixed ends be X= 500mm. Weight W=0.5kg. Original tension in the strand is T= 10 newtons.Your help sincerely appreciated. Gabriel Potter and Stephen La Rocque lui répond.
	What is the intensity 5m below the surface?		2007-03-31
		david pose la question : I have this question which I am supposed to set it up and solve as a differential equation. I know how to solve the diffrential equation but I am having hard time understanding this question. Here is the question: The intensity of light in the ocean decreases the deeper you dive. In fact, the rate at which the intensity decreases is proportional to the current intensity. Setup the corresponding differential equation and solve for I(Y), the intensity I as a function of current intensity Y. If the light intensity 2m below the surface is 25% of the intensity at the surface, what is the intensity 5m below the surface. Can you please explain to me what does it mean by current intensity and how do I set this equation up. Thanks for the help. Penny Nom lui répond.
	The tens digit of a really large number		2007-03-05
		Sai pose la question : How can i find the tens digit of a really large number? i was gven 63^15 + 15^63 in a competitive exam. Penny Nom lui répond.
	Percentage increase in sound intensity		2006-01-29
		David pose la question : I am doing some emotion response mapping. Being a composer I know how to push the heart beat tempo by a % increase of BPM in my music. I want to know how to calculate an increase in intensity of sound. Now I have 60 decibels. I want an increase of intensity by a factor n% with out going over 156 decibels. Penny Nom lui répond.
	The digits in 349		2003-09-12
		Franik pose la question : in the number 349, which number has the least value, and why? Penny Nom lui répond.
	oneths		2002-04-30
		Logan pose la question : why are there tens-tenths hundreds-hudreths, but not oneths if that made no sense then how about this why does everything have two ways of saying things like tens and tenths but not a oneths Claude Tardif lui répond.
	0! + 1! + 2! + 3! + ... + 2000!		1999-10-21
		Melissa pose la question : My name is melissa. I am a 9th grade student I am having trouble finding out how to do this: What is the tens digit of 0! + 1! + 2! + 3! + ... + 2000! I know how to find these, but my calculator cant go any higher than 69! Is there any way i can do this problem? Penny Nom lui répond.

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