Wednesday

January 18, 2017
Total # Posts: 48

**math**

I can't solve this at all! I don't know where to start! Please help 3-(4sin^2 x)/cos^2 x = 3- tan^2 x

*August 22, 2016*

**science**

a bullet of mass 20g is horizontally fired with a velocity of mass 150m/sec from a pistol of mass 20g.what is the recoil velocity of the pistol?

*June 19, 2016*

**Algebra**

Tom gets paid $2.80 per hour.overtime rate is 1 and half time more.He got $173.60 for 54hours of work.How many hours did he work overtime?

*November 17, 2015*

**Philosophy**

f a manager describes a person using the stock phrase "unusually loyal", what does s/he probably mean?

*October 11, 2015*

**math**

Let S be a region bounded by the curve y=x+cosx and the line y=x as shown in the given figure. Find the volume of the solid generated when S is rotated about the x-axis. Find the volume of the solid generated when S is rotated about the y-axis.

*May 20, 2015*

**math**

King Arthur II has problems with pronouncing the digit 3. People are afraid of presenting something which includes 3 in it. The solution found is that if any number includes 3 as a digit, the number is divided by 2. This process continues as far as the new numbers include new ...

*April 26, 2015*

**math**

Show that 8x^3 + 12x + 100logx=O(x^3).

*April 26, 2015*

**math**

A man who is 1.6 m tall is walking on the road at a constant speed of 1 m/s. There is (only) one lamp placed 3.2 m above the road. At a specific moment the man was just under the lamp. What will be the rate at which the length of his shadow will be changing after: a) 2 sec b) ...

*February 22, 2015*

**math**

A wire of length 4 m is cut in two parts and the first part is bent in the shape of a square, while the second part is bent in the shape of an equilateral triangle. For which lengths of these parts the total area enclosed by the square and the triangle is: a. minimized? b. ...

*February 22, 2015*

**math**

A man who is 1.6 m tall is walking on the road at a constant speed of 1 m/s. There is (only) one lamp placed 3.2 m above the road. At a specific moment the man was just under the lamp. What will be the rate at which the length of his shadow will be changing after: a) 2 sec b) ...

*February 22, 2015*

**math**

A truncated square pyramid (also known as a frustum) is an object obtained by cutting a square pyramid by a plane parallel to its base (as shown in the figure). For a truncated square pyramid it is known that the side length of the large base is 10 cm and the height (distance ...

*February 22, 2015*

**math**

A line with negative slope passes through the point P(5,2) and intersects the x-axis at the point A and the y-axis at the point B. a. Find the equation of the line for which the length of the segment AB is the smallest. b. Find the equation of the line for which sum of the ...

*February 22, 2015*

**math**

A trough (a place where horses and sheep drink water) has the shape of a half-cylinder with length 4 m and radius 20 cm. Water is poured into the trough at a constant rate of 300 cm3/s. At what rate (in cm/s) is the level of the water in the trough rising at the moment the ...

*February 22, 2015*

**Chemistry**

What is the (simplified) meaning of Zn(s) + 2MnO2(s) ZnO(s) + Mn2O3(s) [e° = 1.43 V]? Please answer soon, because I will not be in class too much longer and I have no internet access at home. Thank you in advance!

*February 11, 2015*

**chemistry**

Identify the independent, dependent and controlled variables: a)Does the activity of soil affect plant growth? Independent: Dependent: Controlled: b)Does getting a good night's sleep affect performance on a test? Independent: Dependent: Controlled:

*January 26, 2015*

**italian**

write a sentence using the expression "avere mal di"

*October 6, 2013*

**english**

gary waters the other plant every day

*September 17, 2013*

**english**

we plant two bean seeds in different pots.

*September 17, 2013*

**math**

thanks a lot

*March 15, 2013*

**math**

If 96% of Chinese couples have one child (which is female 50% of the time), and the remaining 4% of Chinese couples engage in sex-selective abortion until they have a male child, what is the ratio of females per 100 males among the children (to the nearest whole number)?

*March 15, 2013*

**economics**

. If 96% of Chinese couples have one child (which is female 50% of the time), and the remaining 4% of Chinese couples engage in sex-selective abortion until they have a male child, what is the ratio of females per 100 males among the children (to the nearest whole number)? ...

*March 15, 2013*

**CHEMISTRY**

yes i fond it ,, 0.551

*January 13, 2013*

**CHEMISTRY**

thanks but b>

*January 13, 2013*

**CHEMISTRY**

(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....

*January 13, 2013*

**chemistry**

A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 1.828×10−10 m. Determine the frequency (in hz) of the interacting photon.

*January 13, 2013*

**chemistry**

0.435

*January 12, 2013*

**chemistry**

pls what about b

*January 12, 2013*

**chemistry**

(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....

*January 12, 2013*

**chemistry**

something wrong ... cant find right amswer

*January 12, 2013*

**chemistry**

A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 1.828×10−10 m. Determine the frequency (in hz) of the interacting photon.

*January 12, 2013*

**Chemistry**

18 is not right

*January 11, 2013*

**Chemistry**

something wrong i cant got it

*January 11, 2013*

**Chemistry**

this answer also not righ

*January 11, 2013*

**Chemistry**

4.329E15 this answer is not right

*January 11, 2013*

**chemistry**

At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 553.0 kg of PbS and 830 kg of PbO.

*January 11, 2013*

**chemistry**

) The solubility of bismuth iodide (BiI3) in water is 5.891 x 10-3 M. Calculate the value of the solubility product. The dissolution products are Bi3+(aq) and I−(aq)

*January 11, 2013*

**math**

1)d/dx of cos4x/3-x^2(inculding quentient&chain rule) 2)sin^2x/1+cosx(same method)

*November 14, 2012*

**maths**

if sinØ=cosØ then find the value of Ø

*September 17, 2012*

**chemistry**

SrH2 + 2 H2O ==> Sr(OH)2 + 2 H2 Determine the number of grams of strontium hydroxide (Sr(OH)2) produced when 10.0 g of hydrogen gas (H2) is also produced. (Your answer must have at least 3 significant figures.)

*May 1, 2012*

**Math**

nfhewbh

*March 27, 2012*

**math**

i need the solutions of s^3+〖116∙s〗^2+3360∙s+38=0 please.

*January 24, 2012*

**math**

1.25=2.50

*October 6, 2011*

**parts of speech**

What parts of speeech in English express huour

*January 31, 2011*

**Math**

? confusing

*October 5, 2010*

**Hospitality**

Calculate the IRR and NPV of this project utilizing a 12% discount rate and a 15% cap rate. Ms. Brown was able to secure a loan for $1,540,000, and an equity investor agreed to invest the remaining $660,000 in exchange for 20% ownership in the project?

*June 9, 2010*

**geometry**

ABCD is a quadrilateral with center O. AO=8, BO=11, CO=8, and DO=11. Is ABCD a parallelogram? Explain you reasoning.

*April 27, 2009*

**Chem help**

Which of the three isomers: NOBr, OBrN, or ONBr, is the most stable? Where should I start??

*November 14, 2007*

**Chemistry**

I see where I made my mistake. Are there 12 valence electrons in C2H6?

*November 14, 2007*

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