Friday

May 27, 2016
Total # Posts: 29

**chemistry**

my developing solvent is hexane toluene acetic acid(5:5:1)nd my samples rf nd impurity rf is very close,my spots r not separating properly,so which hexane should hav to be used?n hexane or hexane fraction?is only hexane affect or other factor is there?
*March 10, 2016*

**physics**

A pistol of mass 2 kg fires a bullet of mass 50 g. The bullet strikes a stationary block of mass 1 2 kg. If the block, with the bullet embedded in it, moves with a velocity of 4 m/s, the recoil velocity of the pistol will be (Ignore friction and air resistance)
*November 18, 2015*

**Chinese**

what to say egg and my favorite in chinese please replay me fast
*October 24, 2014*

**8th grade math**

we have not learn like this fraction please help me to teach this i dont no any from here
*September 15, 2014*

**CHEMISTRY**

The data below has been taken for the reaction of a dye with the hydroxide ion. The reaction was performed at two different hydroxide ion concentrations while the dye concentration was kept constant. What is the rate law? [OH─] = 0.10 M [OH─] = 0.20 M t (min) Abs ...
*March 18, 2014*

**math ALG 2!**

x+(x-14)=300 2x-14=300 2x=314 x=157
*March 19, 2013*

**math ALG 2!**

4x=x+78 4(20)=20+78 80=98 no i did guess and check 4(26)=26+78 104=104
*March 19, 2013*

**Calc**

f(x)=2ln(x^2+3)-x Domain [-3,5] how do i find the absolute maximum value of this?
*March 19, 2013*

**algebra**

3(x-2/3)=-10 (x-2/3)=-10/3 x=-8/3
*March 19, 2013*

**Math**

60 degrees
*March 19, 2013*

**algebra**

-.1x-1>.4 -.1x>1.4 x<14 dividing/multiplying negatives switches the sign
*March 19, 2013*

**Calc**

f(x)=2ln(x^2+3)-x Domain [-3,5] how do i find the absolute maximum value of this?
*March 19, 2013*

**never mind! figured it out**

never mind i figured it out
*March 19, 2013*

**Calc**

range of f(x)= 5^(2x^2-1)^(1/2) i know that the domain of the inverse would be the range of this and i've found the inverse but it has natural logs in it and i don't know how to find the domain with that.. i feel like i'm missing something simple
*March 19, 2013*

**math**

the pie is 360 degrees divide that by 10 peices it gives you 36 degrees per slice 3 slices left times 36 degrees is 108 degrees
*March 19, 2013*

**Calc**

thank youu
*March 19, 2013*

**Calc**

i found A and B, just checking if they're right. C i can never remember how to do these. D i haven't tried yet but i could probably figure out but i figured since i was putting the rest up i would do it as well
*March 19, 2013*

**Calc**

The function f is defined by f(x)= (25-x^2)^(1/2) for -5 less than or = x less than or = 5 A) find f'(x) B) write an equation for the tangent to the graph of f at x=3 C) let g be the function defined by g(x)= (f(x) for -5<or=x<or=-3)and (x+7 for -3<or=x<or=5) D...
*March 19, 2013*

**Clueless in calculus**

The function f is defined by f(x)= (25-x^2)^(1/2) for -5 less than or = x less than or = 5 A) find f'(x) B) write an equation for the tangent to the graph of f at x=3 C) let g be the function defined by g(x)= (f(x) for -5<or=x<or=-3)and (x+7 for -3<or=x<or=5) D...
*March 19, 2013*

**Let f be the function be defined by f(x)=5^((2x^2)**

Let f be the function be defined by f(x)=5^((2x^2)-1)^(1/2) find the range of f without using a calculator
*March 14, 2013*

**Chemistry**

12, because there is 1 mole of c6h12o6 and 2 moles of o2 so you have a 1:2 ratio
*January 27, 2013*

**Calc**

they drew a diagram for it and Q is actually on the left side of the graph making the line L an upward slant, and yes i meant "write"
*January 27, 2013*

**Calc**

Line L is tangent to the graph of y= x- (x^2/500) at the point Q a) find the x coordinate of point Q B) right an equation for line L C) suppose the graph above were a hill (measured in feet). There is a 50 foot tree growing vertically at the top of the hill. Does a spot light...
*January 27, 2013*

**Calc**

A particle moves along the x-axis in such a way that it's position in time t for t is greator or equal to 0 is given by x= 1/3t^3 - 3t^2 +8 A) show that at time t= 0 the particle is moving to the right. B) find all values of t for which the particle is moving to the left. ...
*January 27, 2013*

**Ap calc.. Dying!! Please help!**

Given the curve x^2-xy+y^2=9 A) write a general expression for the slope of the curve. B) find the coordinates of the points on the curve where the tangents are vertical C) at the point (0,3) find the rate of change in the slope of the curve with respect to x I don't even ...
*January 25, 2013*

**Physics**

A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?
*January 3, 2011*

**Physics**

What is the scientific principle involved in unmanned level crossing?
*August 30, 2010*

**Physics**

What is the scientific principle involved in unmanned level crossing?
*August 30, 2010*

**physical science**

(A)Speed = 8m/s (B)u=8m/s v=0m/s a=g=9.8m/s2 Use v=u-gt 0=8-9.8t 9.8t=8 t=8/9.8 But this is the time required by the tennis ball to reach the highest point. Time taken by the ball to return to the starting point=2t =2*8/9.8 =8/4.9 =1.632s
*April 16, 2009*

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