Thursday

May 28, 2015

May 28, 2015

Total # Posts: 23

**Chemistry**

Consider a solution of CaCl2 and Mg(NO3)2 in which the concentrations of both Mg2+ and Ca2+ are the same, 0.01. M. Is it possible to separate Ca2+ from Mg2+ by selective precipitation of Mg(OH)2? To be precise, is it possible to precipitate 99.99% of magnesium without ...
*October 21, 2014*

**Calculus**

find the derivative (df/dx) of the squareroot of sin4x
*December 9, 2012*

**Calc **

If f (3) = 9 and f ´(3) = 4, find the tangent line to the graph of f when x = 3
*December 9, 2012*

**calc**

find derivative d/dt of sec * square root of t
*December 9, 2012*

**calc**

Find the slope of the tangent line to the graph y = x-3 at the point (0.5, 8)
*December 9, 2012*

**calc**

Which of the following statements would always be true? I. If f is differentiable at x = c, then f is continuous at x = c. II. If f is continuous at x = c, then f is differentiable at x = c. III. If f is not continuous at x = c, then f is not differentiable at x = c.
*December 9, 2012*

**science**

a man drops a stone in a well and hears the sound of the stone hitting the water after 4 sec calculate the depth of the well ( assuming the speed of sound in the well is 364 m\s )
*September 29, 2011*

**Chemistry**

How do i work out the standard molar entropy of iron(iii) oxide from the data booklet?
*April 21, 2011*

**physics **

A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center as shown in the figure. The linear speed of a passenger on the rim is constant and equal to 7.0 m/s. What are the magnitude and direction of the passenger's acceleration as she passes ...
*November 6, 2010*

**multiple choices **

Which of the following is accelerating? An object moving with a constant velocity. An object moving along a curve. None An object moving on a straught line with a constant speed.
*November 6, 2010*

**physical**

Find the magnitude of the resultant of the following two vectors: i) 50 units due east and ii) 100 units 30° north of west. the answer is 62 unit but how it come ?
*October 25, 2010*

**physics college**

An antelope moving with constant acceleration covers the distance between two points 70.0 m apart in 7.00 s. Its speed as it passes the second point is 15.0 m/s. (a) What is its speed at the first point? (b) What is its acceleration? A car is stopped at a traffic light. It ...
*October 8, 2010*

**college physics**

in the first i chose last one but in second p mean density so the formula should be p=m/v m mass , v volume is not it ?
*October 2, 2010*

** - Physic college**

should we divied it , I mean solve it like x = 1/2at^2 ,x= bt^3 and take each part individual ! how can get red of (sin) from this formula , also here should i handle it individual !
*October 1, 2010*

** - Physic college**

if at^2 is distance, then a must be distance/time^2 okay but from where can i get distance ?! i mean as a number ! also here sin (C2 t) i think it is constant so we can't take dimension or i am wrong :( Again Thank u a lot :D
*October 1, 2010*

** - Physic college**

The equation for the change of position of a train starting at x = 0 is given by x=1/2at^2 + bt3 . Find the dimensions of a and b. If y = C1 sin (C2 t) where y is a distance and t is the time. What are the dimensions of C1 and C2 ?.
*October 1, 2010*

** - Physical Education **

writeeacher i don't what u mean ! but i study this problems in physics any way i am sorry if i do any mistakes ! bobpursley thank u for help but should i convert it to k.g/m^3
*September 30, 2010*

** - Physical Education **

Calculate the density in SI units of a solid cube that measures 5 cm on each side and has a mass of 350 g.
*September 30, 2010*

**physics**

The two masses in the Atwood's machine shown in the figure are initially at rest at the same height. After they are released, the large mass, , falls through a height and hits the floor, and the small mass, , rises through a height . Find the speed of the masses just ...
*July 1, 2010*

**physics**

A 1.9- block slides down a frictionless ramp, as shown in the figure. The top of the ramp is = 2.1 above the ground; the bottom of the ramp is = 0.40 above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance away. Find the distance .
*July 1, 2010*

**History**

Why did relations between the Superpowers change in the years 1962-75?
*March 21, 2010*

**maths**

A man invested Rs30000 in two types of bonds.On one he earns 5% and on the other he gets 75.If his total earnings are Rs2000,find his investment in each type of bonds.Pls answer this question with required steps. earnings= amount1*.05 + amount2*.075 you know earnings. You also...
*July 12, 2007*

**social studies**

I need legends associated with taj mahal,sanchi stupa,and ajanta and ellora caves. It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is, and I'm sure that's what your teacher expects you to...
*July 9, 2007*

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