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16 articles trouvés pour ce sujet.

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	The period T of a pendulum		2012-03-27
		Ashley pose la question : The period T of a pendulum is given in terms of its length, l, by T=2pi sqrt(l/g) where g is the acceleration due to gravity(a constant) a. find dT/dl b. what is the sign of dT/dl c. what does the sign of dT/dl tell you about the period of the pendulums? Penny Nom lui répond.
	Is 0.1234567891011.... periodic?		2010-02-23
		Adriana pose la question : 0.1234567891011.......Is this fraction periodic ? Penny Nom lui répond.
	y = sin(x) + 3		2009-11-10
		Kapilan pose la question : When graphing trigonometric functions like SIN and COSINE does f(x)=x squared equal to SIN or COSINE Also what is the range, domain, period and ampliltude for y=sin@ + 3 Harley Weston lui répond.
	Time in a Swing		2009-02-22
		Barb pose la question : I looked at the questions concerning a pendulum as I know I need to use this formula but I am stiil not able to figure this problem out. Can you help? If a child is on a swing with a 10 foot chain, then how long des it take to complete one cycle of the swing? I know I am suppose to use the formula 8T^2 = pi^2 L but I do not understand how to do this. Thanks Janice Cotcher lui répond.
	What is a group of three numbers within a larger number?		2008-12-16
		kim pose la question : My daughter brought home a question for math homework. What is a group of three numbers within a larger number? Robert Dawson and Harley Weston lui répond.
	A periodic function		2008-11-26
		Ali pose la question : A periodic function f(x) has a period of 9, if(2)=-3 and f(5)=13, determine the value of f(11)? tks /rgrds Ali Penny Nom lui répond.
	The number of hours of daylight		2008-06-03
		Marilyn pose la question : Hi, could you please help me with this question? In a city (in the Northern Hemisphere) the minimum number of hours of daylight is 9.6 and the maximum number is 14.4. If the 80th day of the year (March 21) has 12 hours of daylight, determine a sine function which gives the number of hours of daylight for any given day of the year. (Jan 1 = 1, Jan 2 = 2, etc). Thank you! Harley Weston lui répond.
	The swaying of a building in the wind		2007-08-11
		San pose la question : During a strong wind, a tall builing, such as the CN Tower, can sway back and forth as much as 100cm, with a period of 10 seconds. Please help me to determine the equation for this function, in the form y=asinkx Stephen La Rocque lui répond.
	How many complete cycles does the piston make in 30minutes?		2007-08-11
		San pose la question : A piston in a large factory engine moves up and down in a cylinder. The height, h centimetres, of the piston at t seconds is given by formula h=120sin(pi)t+200 How many complete cycles does the piston make in 30minutes? Penny Nom lui répond.
	Period of a sum of trig functions		2007-06-17
		Aakash pose la question : the period of the function f(x)=cos3x+sin4x+tan4x Stephen La Rocque lui répond.
	The period of a simple pendulum		2007-03-10
		Melissa pose la question : The period of a simple pendulum of length L feet is given by: T=2pi(sqrt(L/g))seconds. It is assumed that g, the acceleration due to gravity on the surface of the earth, is 32 feet per second per second. If the pendulum is a clock that keeps good time when L=4 feet, how much time will the clock gain in 24 hours if the length of the pendulum is decreased to 3.97 feet? (Use differentials and evaluate the necessary derivative at L=4 feet.) Answer is in seconds. Melissa Penny Nom lui répond.
	The period of sin(x) + cos(x)		2005-07-21
		A student pose la question : WHAT IS THE PERIOD OF SIN(X)+COS(X)? Penny Nom lui répond.
	What is a group of three numbers called in a large number?		2002-01-15
		Laurie pose la question : What is a group of three numbers called in a large number? My son has this question on his 4th grade worksheet. I've taught middle school math for 7 years and nver heard of it. Paul Betts lui répond.
	Finite non-periodical numbers		2001-03-27
		Wouter pose la question : Is there anyone who knows the official name for decimal finite non-periodical numbers such as 0.4 or 0.25 as opposite of numbers like 0.3333333... or 0.28571428571428...? Penny Nom lui répond.
	Period		1999-12-28
		Mahdawi pose la question : I have attached a diagram of the graph, and I need to find out its period. I really don't understand how to do so, please help! Harley Weston lui répond.
	Graph of a sine function		1999-12-23
		Pierre pose la question : Given; amplitute:1 period: 540 Phase shift: 60 degree,right I am ask to right the equation: sin 2/3 (value -60degree) When I am asked to graph the equation, the period is mixing me up. Harley Weston lui répond.

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