a flare is launched from a life raft with an initial velocity of 176 m/ sec. how many seconds will it take for the flare to return to the sea?
find the speed at which water travels in a pipe if the height is (use the formula v^2 = (h+10)
a. 5cm b. 8cm. c. 18cm.
the velocity of a bloodcorpuscle in a vessel depends on how far the the corpuscle is from the center of the vessel. let r be the constant radius of the vessel ; Vm , , the constant maximum velocity of the corpuscle ; r, the distance from the center to a particular blood corpuscle (variable); and Vr, the velocity of that corpuscle . the velocity Vr, is related to the distance according to Vr=Vm(1-r^2/R^2). find r when Vr=1/4 Vm.
the sensitivity S to a drug is related to the dosage x by S=1000x-x^2. sketch the graph and determine what dosage gives maximum sensitivity. use the graph to determine the maximum sensitivity.
2006-10-09 00:23:23 · 3 answers · asked by avenger 2 in Science & Mathematics ➔ Mathematics
Alright, thats a load that can get me 10 points I hope.
1) THE FLARE
Assuming that the flare is launched in vertical direction at 176 m/sec
and g = 9.8 m/sec^2.
it will take 176/(9.8) = 17.96 seconds to come to halt in the air.
it takes the same time to come to ground
So, the total time is 2 X 17.96 = 35.92.
2) WATER
a)we have h = 5cm => v = sqrt(h + 10) => v = 3.873
b)we have h = 8cm => v = sqrt(h + 10) => v = 4.263
c)we have h = 18cm => v = sqrt(h + 10) => v = 5.29
3) RED BLOOD
I have no idea what to do with the explanation of the data but all I care is about the data and the formula and thus I'll jut do what I can.
Note: I think that you may have mistaken the formula
Vr=Vm(1-r^2/R^2). and I have replaced R with r as R has no meaning.
Given that Vr = 1/4 Vm
=> 1/4 = ((1-r^2)/r^2)
=> 1/r^2 - 1 = 1/4
=> 1/r^2 = 5/4
=> r = sqrt(4/5)
=> r = 0.8944
4) Well I cant help you with this. I have no priviledge of drawing a graph.
Peace out.
2006-10-09 01:43:16 · answer #1 · answered by Pradyumna N 2 · 0⤊ 0⤋
I would say hard, most people would not be able to get the answer to any of these even with your explanations.
2006-10-09 07:32:33 · answer #2 · answered by redhotboxsoxfan 6 · 0⤊ 0⤋
1/4Vm=Vm(1-r^2/R^2)
so 4-R^2/4=r^2 so r=(sqrt4-R^2)/2
2006-10-09 10:32:01 · answer #3 · answered by Anonymous · 0⤊ 0⤋