Sujet: rock liste de sujets
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8 articles trouvés pour ce sujet.

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	Calculer la hauteur de chute de cette pierre		2000-12-16
		Marcus pose la question : Une pierre tombe au fond d'un puit, à 5 secondes on entend un son (de la pierre). Calculer la hauteur de chute de cette pierre en tenant compte de la vitesse du son = 340m.s-1 Il faut savoir que pour la chute libre v= g.t ; h = 1/2 g.t2 ; v = 2g.h g intensité du champs de pesanteur = 10 ; h hauteur de chute. Claude tardif lui répond.
	Covering a site with 6 inches of rock		2016-04-26
		Carla pose la question : if a pump house that measures 20'x16' sits in the middle of a site that is 50'x60' and you apply crushed rock to the site at depth of 6", how many yards will you need to haul? Penny Nom lui répond.
	Filling a hole with 14 tons of rock		2016-04-08
		Barry pose la question : If I had 14 tons of inch and one half sized aggregate rock, how large of a square or rectangular shaped hole would I need to hold that amount? Penny Nom lui répond.
	A camera's line of sight		2011-02-26
		MJ pose la question : A rocket that is rising vertically is being tracked by a ground level camera located 3 mi from the point of blast off when the rocket is 2 mi high its speed is 400mph At what rate is the (acute) angle between the horizontal and the camera's line of sight changing Penny Nom lui répond.
	When will the rocket hit the ground?		2007-04-05
		Megan pose la question : A model rocket is launched at an upward velocity of 460feet per second off a platform that is 40 feet up from the ground. Use the formula h(t)= -16+vo+ho where vo is the initial velocity an ho is the initial height. A.) Find the maximum hight of the rocket. B.) How long does it take to reach the maximum height? C.) When will the rocket hit the ground? Stephen La Rocque lui répond.
	I need to fill an area with rock		2005-03-04
		Kelly pose la question : if I need to fill an area with rock that is 64 feet long by 4 feet wide and 1 foot 2 inches in depth how many tons of rock will this job require? it is also sold by cubic yard how many of these cubic yards will I need? Penny Nom lui répond.
	A rock on a string		2003-10-26
		A student pose la question : a rock on a 4' string is rotated at 80 rpm. what is the linear speed in feet per second? in miles per hour? Penny Nom lui répond.
	A two stage rocket		2002-11-26
		Hoda pose la question : a two stage rocket accelerates in free space by ejecting fuel at a constant relative speed , v(ex). the full fuel load makes up 80% of the initial mass of the entire two stage rocket . the rocket accelerates from rest until at the end of the first stage when 75% of its fuel has been burnt. find an expression for the speed of the rocket at the end of the first stage in terms of v(ex). Claude Tardif lui répond.

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