Saturday

October 1, 2016
Total # Posts: 635

**Calculus II**

What is sin(i) -- (sin of the imaginary number, i) What is cos(i)-- cosine of the imaginary number, i orrr tan(1+i) You can derive these things from the equation: Exp(i x) = cos(x) + i sin(x) ---> sin(x) = [Exp(ix) - Exp(-ix)]/(2i) cos(x) = [Exp(ix) + Exp(-ix)]/2 tan(x) = 1...

*March 5, 2007*

**Math Question**

Which one of the following pairs of triangle must be similar? a) two isosceles triangles with congruent vertex angles b) two right triangles c) two scalene triangles with congruent bases d) two obtuse triangles a) if the two vertex angles are the same then the other two angles...

*March 4, 2007*

**Math**

If two angles of one triangle are congruent to two angles of another triangle, these triangles must be a) scalene b) similar c) congruent d) isosceles Dont all traiangles have 180 degrees? So if two angles were congruent, what about the third? I still don't get it. I would...

*March 4, 2007*

**Math Question**

If two sides of a triangle have lengths 4 and 9, then the length of the third side may be any number a) less than 13 b) greater than 5 but less than 13 c) greater than 4 but less than 9 d) greater than 5 I suggest you draw this. It is not d, nor a. it is b. Am I correct? yes ...

*March 4, 2007*

**chemisty help**

for the reaction shown, compute the theoretical yield of the product in grams for each of the following initial amounts of reactants. Ti + 2F2 to make TiF4 There are 3 sub questions for this. Help me out with one, then I'll try to figure out the rest. thanks a) 4.8g Ti; 3....

*March 1, 2007*

**Poetry: The Next War Wilfred Owen**

The theme of this poem is a look to the future where men would war against death to save lives.

*February 8, 2007*

**science**

230 volts, 120 watts what fuses will i need a 3A, 5A, 13A please answer Power= V*I so currnt= power/V in this case 120/230, in this case less than an ampere. So use the 3A.

*January 25, 2007*

**Why can't I post**

I dont know why, but i am getting a friend to post this up for me, but i cannot post a question, when i do, the successful window never comes up. it just goes back to the forum and doesnt add. can anyone help me why? or what i might need to do to get it fixed? This posted and...

*January 18, 2007*

**math**

3vt+v(5v-7t 5v^2 - 7vt + 3vt combine the last two terms.. 5v^2-10vt factor out a 5v 5v ( you do the rest).

*January 10, 2007*

**Chemistry Check if its right XD**

Ok here is the problem but i only need help on part a XD i think i did it wrong..so can you check my work? and tell me where i made the mistake? The space shuttle uses aluminum metal and ammonium perchlorate, NH4ClO4, in tis reusable booster rocket. The products are aluminum ...

*January 9, 2007*

**Biology help..!**

How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA? The are complementary. How does the nucleotide sequence in one chain of DNA compare with the other chain of DNA?

*January 9, 2007*

**Biology**

1. How many base pairs are in a full turn or twist of a DNA molecule? 2. Name the complementary base pairs on DNA. A-T; G-C are the pairs, you name them. there are 10 1/2 base pairs for a full twist in DNA How does the nucleotide sequence in one chain of DNA compare with the ...

*January 9, 2007*

**English, Poetry Riddles**

Legs I have got, yet seldom do I walk; I backbite many, yet I never talk; In secret places most I seek to hide me, For he who feeds me never can abide me. [p.s pleeeeeeease help me!! :S

*January 8, 2007*

**physics**

IO, a small moon of the girant plant jupiter has an orbital period of 1.77 days and an orbital raduis equal to 4.22*10^5km. From these data, determine the mass of jupiter. nvm XD i solved it myself ^^

*January 8, 2007*

**physics**

A satellite has a mass of 100 kg and is in an orbit at 2.00*10^6 m above the surface of the Earth (a) what is the potential enegry of the satellite at this location?(b) what is the magnitude of the gavitational forece on the satellite? a) Since the weight drops somewhat as a ...

*January 8, 2007*

**physics**

Given that the Moon's period about the Earth is 27.32 days and the distance from the Earth to the Moon is 3.84*10^8 m estimate the mass of the Earth. Assume the orbit is circular. Why do you suppose your estimate is high? The force of attraction= centripetal force G MeMm/d...

*January 8, 2007*

**physics**

Use the table of 7.3 to find the point between the Earth and the Sun at which an object can be placed so that the net gravitational force exerted on it by these two objects is zero. TABLE 7.3 <--- for the earth and the sun Body

*January 8, 2007*

**physics**

1. the average distance separating the Earth and the Moon is 384 000 km. Use the data table 7.3 to find the net gravitational force the eath and the moon exerts on a 3.00*10^4-kg spaceship located halfway between them. TABLE 7.3 <--- for the moon and the earth Body

*January 8, 2007*

**math**

the vertices are at (2,1) and (2,7) and focus is at (2,*) write the equation of the hyperbola that meets each set of conditions. Is the asterisk supposed to be an 8? It has to be some number. I will set this up for you later of you respond. The fomulas you need are in most ...

*January 4, 2007*

**US history**

here is my question Why did socialism appeal to some Americans in the late 1800s? Many people were disturbed by the horrendous working conditions for laborers in factories. They worked long hours, made very little money, and therefore lived economically impoverished lives. ...

*January 4, 2007*

**physics**

A 2000-kg car rounds a circular turn of a radius 20m. if the radius flat and the coefficient of friction between tires and road is .70, how fast can the car go without skidding? centripetal force = frictional force m v^2/r= mg*mu solve for v. um i was wondering..do i need to ...

*January 2, 2007*

**physics**

hi i have a physics question i dont understand here is the question A sample of blood is placed in a centrifuge of radius 15 cm. the mass of the corpuscle is 3.0*10^-16 kg, and the magnitude of the force required to make it settle out of the plasma is 4.0X10^-11 N. At how many...

*January 2, 2007*

**English Essay**

i was wondering if anyone can help me with an essay that is a comparison between the Rapunzel by the Grimm Brother's to a story called "Rapunzel Rapunzel" by Jean Ryes. The prompt is: Compare the two essays with the hair,tower and princ and how it is related to ...

*December 10, 2006*

**Physics**

sorry i know i keep asking but my teacher wont be here today and tomorrow..and i dont understand these four problems... 1) a 65.0-kg person throws a .045kg snowball forward with a ground speed of 30.0 m/s. a second person with a mass of 60.0-kg catches the snowball. both ...

*December 8, 2006*

**Physics-momentum/impluse**

hi well i have two questions i dont understand how to solve and all. 1) The front of a 1400-kg car is designed to absorb the shock of a collision by having a "crumple zone" in which the front of 1.2m of the car collapses in absorbing the shock of a collision. if a ...

*December 6, 2006*

**the big idea of energy**

You guys I have an assesment on the "The Big Idea of Energy" and I have no clue about it, no one told be anything! It's soooo stupid so you have got to tell me what it NOW!!!

*December 5, 2006*

**physics-energy**

HI well i have two questions 1) a 2.0-m-long pendulum is released from rest when the support string is at an angle of 25 with the vertical. what is the speed of the bob at the bottom of the swing? 2)A 2.0*10^3-kg car starts from rest at the top of a 5.0-m-driveway that is ...

*November 27, 2006*

**Math-acceleration**

An object moves across a straight line so that after t seconds, is distance from its starting point is: D(t)=t^3 - 12t^2 + 100t + 12 meters. Find the acceleration of the object after 3 seconds. I believe acceleration is calculated by taking the second derivative. D'(t) = ...

*October 3, 2006*

**technology**

can you please tell me types of metal and about them thanks

*September 23, 2006*

**making dot arrays**

Numbers that CAN be made into a 2-row dot array are EVEN numbers (2,4,6,8,etc). Those that CANNOT are called ODD (1,3,5,7). in other words, if the question is asking you to make a 2-row array, it wants you to divide the number by two and make 2 rows of X dots. Example - Make a...

*August 31, 2006*

**Math - Chain Rule**

I've been having some difficulities with this but I think I figured it out. Could you double check me and make sure I'm doing the correct steps? Differentiate and simplify the answer. f(x) = 2(3x+1)^4 (5x-3)^2 =2(3x+1)^4 [2(5x-3)(5)] + [8(3x+1)^3] (5x-3)^2 =2(3x+1)^4 [...

*August 25, 2006*

**geometry:linear measure and precision**

RS=4x,RS=ST,and RT=24

*August 23, 2006*

**math - marginal analyis**

A factory's output is Q=600K^1/2L^1/3 units, (read 600 x K to the 1/2 power x L to the 1/3 power). K denotes capital investment and L denotes the size of the labor force. Estimate the percentage increase in output that will result in a 2% increase in the size of the labor ...

*August 13, 2006*

**math-marginal analyisis**

Just need someone to double check this problem. I just don't feel comfortable with my answer. An enviromental study of a certain communtiy suggests that t years from now, the average level of carbon monoxide in the air will be Q(t)=0.05t^2+0.01t+3.4 parts per million. (...

*August 11, 2006*

**sociology**

I can only laugh! How freakin' funny that everyone at Axia doing their ETH125 homework trying to see what they can find on the net hits this site. Thanks for the tips (yes, they are just tips - because it does not tell you what it says in Chp2 pg34.) Good luck to all ...

*July 20, 2006*