Science & Mathematics - 8 November 2006

2006-11-08 03:03:25 · 3 answers · asked by chta7691 1 in Geography

A milling machine which weights 120KN is vibrating within the frequency of 20 Hz to 40 Hz due to an unbalanced mass.
(a) The laboratory has an accelerometer with a natural frequency of Wn = 100 rad/s. Determine if the accelerometer is suitable for measuring the acceleration of the milling machine vibration if the measurment error is to be less than 5%.
(b) The shop floor wants to isolate the vibration from the milling machine to yhe ground. The required transmissibility ratio TR is 0.3 at 30 Hz using an isolator that has a stiffness of K=50000000 N/m. Find the damping ratio of the isolator.

2006-11-08 03:03:23 · 1 answers · asked by Jeff Ang 1 in Engineering

A 65-kg trampoline artist jumps vertically upward fromt he top of a platform with a speed of 5.0m/s. if hte trampoline behaves like a spring with spring stiffness constant 6.2 x 10^4 N/m, how far does he depress if?

Answer: -0.31 m

2006-11-08 03:01:13 · 3 answers · asked by lp177026 1 in Physics

2006-11-08 03:01:08 · 6 answers · asked by Jane g 1 in Mathematics

Jupiter is nicknamed the "Failed Star" due to its size. Jupiter's diameter is 143,000 km which makes it the largest planet in the solar system. If you drove around Jupiter non-stop at 100km/hr, how many days will it take you? (HINT: use s=d/t To find the distance, find the circumference (3.14 X Diameter)) Don't forget to convert your answer to days!

2006-11-08 02:59:02 · 7 answers · asked by John 2 in Astronomy & Space

If the vertcies of square "A" are the midpoints of the edges of square"B", then what is the ratio of the area of square "A" to square "B"?

2006-11-08 02:55:41 · 7 answers · asked by Sasha 2 in Mathematics

Very dark here and cold here on the fells

2006-11-08 02:55:34 · 45 answers · asked by The Professor 1 in Weather

2006-11-08 02:54:33 · 9 answers · asked by Anonymous in Engineering

Guys,its for science project, can we built the telescope at home,
if so what will be its resolution power?.please give out the procedure

2006-11-08 02:53:03 · 7 answers · asked by symba_micro 2 in Astronomy & Space

2006-11-08 02:46:58 · 23 answers · asked by Gilligan 5 in Geography

2006-11-08 02:44:01 · 2 answers · asked by pktmotion 1 in Medicine

please try to give it with simple procedures or by giving a good websites

2006-11-08 02:42:45 · 2 answers · asked by Anonymous in Mathematics

1 What is the force on a .35kg CD .2m from the center if it takes .15s to complete a rotation
2 With 3N force you can swingb your .35m key chain around in a circle in .85s.What is the mass of your keys

2006-11-08 02:42:07 · 2 answers · asked by Anonymous in Physics

I need to hand in an assignment with an explenation and an example of ELISAs use on friday. I've been looking for the last 2 months and I can only find a coulpe of websites that tell me anything. Please help! It'll be much appreciated.

2006-11-08 02:41:37 · 4 answers · asked by phillipa247 2 in Medicine

2006-11-08 02:41:07 · 3 answers · asked by Anonymous in Geography

2006-11-08 02:39:57 · 6 answers · asked by cameron f 1 in Astronomy & Space

2006-11-08 02:39:18 · 1 answers · asked by tanush_pravin 1 in Engineering

2006-11-08 02:39:06 · 3 answers · asked by Anonymous in Weather

I am looking for the method and EXACT solvents needed in order to take a bunch of bananas mash them up and then extract only pure potassium out of them.

Can anyone help me out on this one?

Thanks for any help you can give.

2006-11-08 02:35:52 · 4 answers · asked by Chem_lover_Chris 2 in Chemistry

2006-11-08 02:33:28 · 6 answers · asked by stinker 1 in Mathematics

Also says to not eat it, so what is the point?

2006-11-08 02:33:09 · 10 answers · asked by Gilligan 5 in Other - Science

why did the growth of gram positive bacteria is inhibited by crystal violet dyes in the selective media.

2006-11-08 02:32:39 · 4 answers · asked by Black_Kaz 2 in Biology

be faster

2006-11-08 02:32:36 · 13 answers · asked by suraj g 1 in Geography

Prove that for all n>1, if x[1], x[2],..., x[n] are real numbers strictly between 0 and 1, then (1-x[1])(1-x[2]0...91-x[n]> 1-x[1]-x[2]-...-x[n]

2006-11-08 02:31:48 · 3 answers · asked by yanesh_r 1 in Mathematics

Since photon from stars can travel zillions of miles to earth into our eyes, the energy of photons should not dissipate that quickly that it does not last a few seconds after you switch off a light source.

2006-11-08 02:31:24 · 10 answers · asked by Anonymous in Physics

(a)There is no gravitational force acting on them
(b)The satellite and the air inside it have an acceleration equal to that of gravitational acceleration there.
(c)The gravitational force of the earth and the sun balance giving null resultant.
(d)There is no atmosphere at the height at which the satellites move

2006-11-08 02:29:00 · 11 answers · asked by muteeu b 1 in Astronomy & Space

2006-11-08 02:28:18 · 10 answers · asked by LL 3 in Other - Science

Can anyone tell me where i can find a book on Puffe Penguins

2006-11-08 02:27:41 · 6 answers · asked by LJRJJ 2 in Zoology

Prove that 1(1!) + 2(2!) +.....+n(n!) = (n+1)! -1

2006-11-08 02:27:31 · 4 answers · asked by yanesh_r 1 in Mathematics

2006-11-08 02:26:05 · 8 answers · asked by Anonymous in Physics