seidi.yamauti
 Name:
 Seidi Yonamine
 School:
 USP
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Questions Answered

seidi.yamauti:
A ball with mass m and velocity v hits a wall, and suffers an elastic colision. So it comes back vith velocity v (1 dimension motion).
…
 updated one year ago
 7 replies
 2 Medals
Mathematics

seidi.yamauti:
I wrote it in MIT's 8.01[OCW  Physics] subject, but seems that there are not much movement..
At the end of lecture 12, Prof. Walter Lewi…
 updated one year ago
 6 replies
 No Medals Yet
Mathematics

chronicle:
│x – 5│ = 3
a. x = 8 and x = 2
…
 updated one year ago
 99 replies
 1 Medal
Mathematics

mlk913:
find all values of Θ for which sinΘ = sqrt (1cos^2Θ) on (0,2pi)
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

chronicle:
Solve.
8x – 5 ≥ 27
…
 updated one year ago
 23 replies
 1 Medal
Mathematics

amber96:
Solve cos x tan x  sin^2x = 0 for all real values of x.
 updated one year ago
 8 replies
 1 Medal
Mathematics

ChrisSvengali:
The wavelength of a wave on a string is 1.2 meters. If the speed of the wave is 60 meters/second, what is its frequency?
 updated one year ago
 2 replies
 1 Medal
Mathematics

tpenn:
solution to x31=4
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

tpenn:
solve (x+3)(x+4)=0
 updated one year ago
 5 replies
 No Medals Yet
Mathematics

omgitsana:
what is the derivative of f(x)=x(2x1)^(1/2)
 updated one year ago
 6 replies
 2 Medals
Mathematics

MajicMuzyk:
Give one example of a scientific discovery that has both advantages and disadvantages and discuss the tradeoffs involved in use of the disco…
 updated one year ago
 2 replies
 1 Medal
Mathematics

ANTHONYFR:
uppose ÐABC = 60o. If ÐABC is bisected, each of the new angles would be
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

andrefontex:
is there any "open study" platform or good archive for college/university students?
 updated one year ago
 8 replies
 No Medals Yet
Mathematics

GiordanoPM:
It's always been said that the work required to lift a weight up to some defined distance is the same wether you take 1 second or 1 minute t…
 updated one year ago
 15 replies
 3 Medals
Mathematics

fortytwo:
What is the expression in factored form?
5x2 – 80y2
 updated one year ago
 13 replies
 1 Medal
Mathematics

JillieW:
Graph the inequality: x ≤ –2
…
 updated one year ago
 9 replies
 2 Medals
Mathematics

ktlyn9:
k/6 > 4 (1 point)
 updated one year ago
 5 replies
 1 Medal
Mathematics

EmmaH:
PLEASE HELP!!!! Solve the system, using substitution. One point for correct steps, one point for correct ordered pair, (a,b).
a + b = 4 an…
 updated one year ago
 38 replies
 3 Medals
Mathematics

fernando18:
5^x=81.2
 updated one year ago
 9 replies
 No Medals Yet
Mathematics

chevygirl:
Solve for x.
 updated one year ago
 24 replies
 2 Medals
Mathematics

larrissia:
Determine whether the formula describes Y as a function of X: y=9x+1
 updated one year ago
 12 replies
 1 Medal
Mathematics

seidi.yamauti:
Do you know some good sites for selfstudying?
Other than Open Study and OCW, edx..., is there some place that you actually find organize…
 updated one year ago
 5 replies
 2 Medals
Mathematics

Owa_Chan:
which expression describes the rule of the sequence?
3, 6 , 9 , 12, 15, 18 ,.....
A. 3+(n1)…
 updated one year ago
 4 replies
 2 Medals
Mathematics

pinkpony:
Which statement about subatomic particles is NOT true?
A. Protons and neutrons have almost the same mass.
…
 updated one year ago
 4 replies
 No Medals Yet
Mathematics

John4m2:
what is centripetal force? and how is centripetal force operating ?
 updated one year ago
 3 replies
 2 Medals
Mathematics

seidi.yamauti:
An object with mass m1=4.00kg and a box with mass m2=5.00kg are attached by a wire (massless) that pass trough a sheave (negligible mass too…
 updated one year ago
 17 replies
 1 Medal
Mathematics

seidi.yamauti:
Solve the wave equation [if someone can post the wave equation] by the separation of variables method (y(x,t)=X(x)T(t)) for the case of both…
 updated one year ago
 12 replies
 1 Medal
Mathematics

xxxtechmanxxx:
MATRIX QUESTION
 updated one year ago
 12 replies
 No Medals Yet
Mathematics

seidi.yamauti:
[linear algebra] <(x1,x2),(y1,y2)> = x1y1 + tx2y2
For which valor of t, it is an in internal (scalar) product?
 updated one year ago
 12 replies
 No Medals Yet
Mathematics

seidi.yamauti:
An undamped oscillator of mass m and natural frequency Wo moves under the action of an external force F=Fo sin(wt). Starting from the equili…
 updated one year ago
 8 replies
 1 Medal
Mathematics
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