# Posts by ali

Total # Posts: 839

**Orbital Dynamics**

The zero-velocity value of the Jacobi integral at the L2 point of the Earth-Moon system is C= -1.59411. Suppose a spacecraft is newar Earth (r2=1/60 in our descriptions). Approximately waht speed must the craft have realtive to the rotating system if it is able to reach the L2...

**Orbital Dynamics**

The zero-velocity value of the Jacobi integral at the L2 point of the Earth-Moon system is C= -1.59411. Suppose a spacecraft is newar Earth (r2=1/60 in our descriptions). Approximately waht speed must the craft have realtive to the rotating system if it is able to reach the L2...

**Math (Grade 12 Data Management)**

a coin is tossed 8 times. caluclate the problitlty of tossing 6 heads and 2 tails 7 heads and 1 tails and at least 6 heads

**Chemistry - DrBob222**

CaCl2 + NaOH ---> Ca(OH)2 ppt

**unsramble words**

unscramble d c e d w n i

**Reading**

My Reading teacher gave it to me to learn steps in a Process

**Reading**

Hi My theacher is telling me to do an egg drop project with 16 plastic straws with tape it's due tommorow an I need to finish very quickly PlEASE HELP ME!

**math**

Find a formula for the following functions: x -2 -1 0 1 2 3 4 y 0 3 4 3 0 -5 -12 x -4 -3 -2 -1 0 1 2 3 4 y 25 16 9 4 1 0 1 4 9

**Calculus!**

What is the velocity of an object dropped from a height of 350 m when it hits the ground?

**French**

What is a good site for learning how to speek french for free?

**Science**

What are some similaraties between Vertebrates and Invertabrates

**Science**

What are 5 differences between Vertebrates and Invertabrates

**Math**

1999 starts on Friday, so the first week ends on Thursday. 7 days in a week x 52 weeks in a year = 364 days + 1 + 365 so the year 2000 starts on a Saturday. 2000 starts on Saturday, so the first week ends on Friday. 7 x 52 = 364 + 2 (for leap year) = 366 so the year 2001 ...

**Math**

The year 1999 contains 365 days and begins on Friday. Use deductive reasoning to figure out what day of the week the year 2000 begins on. Show your method. The year 2000 is a leap year; 366 days. What day of the week does 2001 begin on? Show method. How many different ...

**math**

Please write the expanded and word form of 2.089 as well as the fraction form

**math**

Write 2.089 in expanded and word form as well as in a fraction

**Physics**

I have an ice cube :3000 KG,the tempereture is about 50 (cel).would you please let me know how much does it take long for it to change into water ,Hourly Basis ? Regards

**joiurnal entry**

Earnestine Company issued 10,000 shares of common stocks for $100,000. write the journal entry to record the transaction

**Chemistry**

Describe how you would obtain pure crystals of Sodium chloride from a muxture of solid sodium chloride and solid zinc carbonate Step1 Step 2 Step 3 1. Add HCl to react with the carbonate. The products are zinc chloride, CO2, and water. The CO2 leaves as a gas and the water is ...

**maths help**

Hi MY question is if a cylinder has a volume of 72cm cubed and a cross-sectional area of 18cm squared. Work out the height of the cylinder Can someone show me how we do it by the steps The volume of a cylinder is given by volume = (cross-sectional area) x height so height = ...

**Maths help**

Hi MY question is if a cylinder has a volume of 72cm cubed and a cross-sectional area of 18cm squared. Work out the height of the cylinder Can someone show me how we do it by the steps The cross-section of a cylinder is a circle. so pi(r)^2=18 solve for r let the height be h ...

**The Crucible (ACT TWO)**

at the beginnig of this act, john proctor says, It is winter in here yet." why is this pertinent to what is going on?

**Anatomy**

Our biology class is studying the human skeletal system this month, and I need to find some information on the fone bone for my report. Can anyone help me out? Thank you for using the Jiskha Homework Help Forum. Is some one joking with you? "Fone Bone" is a comic ...

**science**

what determine's the direction that Halley's comet points? The tail points away from the sun.

**math**

3x^2+11x-20=0 (3x -4)(x + 5) = 0 x = 4/3 or -5

**math check please**

57/54 = c/18

**Bio (please help me, important)**

In my bio lab we are creating serial disk dilutions (100mg, 300mg, 500mg) from a plant extraction sample. Wood sample #1 (7mL of hexane) Hexane 0.6651g so .6651g of the plant was dissolved in 7mL of hexane. Then I did dilution calculations so 0.6551g/7 mL = 0.095g/ml so I ...

**science**

I need to find a good site with information about the bacteria Alcaligenes faecalis. I haven't been able to find anything no matter how much I searched, only bits and pieces. Would u know any good sites? http://www.uic.edu/depts/mcmi/faculty/silver/Combined%20Cosmids%20Map...

**Chem**

For germanium atom write: the set of four quantum numbers for the two highest energy electrons in an atom of Ge. If you go to www.webelements.com and click on Ge, then click on the electron configuration (on the left side of the site but you may need to scroll to find it). ...

**math**

3)How mnay subsets of 6 integers taken from the numbers 1,2,3...,20 are there such that there are no consecutive integers in any subset (e.g. if 5 is in the subset then 4 and 6 cannot be in it)? This is a fairly challenging problem, what have you tried so far? There are 20 ...

**language arts**

a metaphor for macaroni salad http://www.tnellen.com/cybereng/lit_terms/terms/2terms.html#Metaphor http://www.tnellen.com/cybereng/lit_terms/metaphor.html http://web.cn.edu/kwheeler/lit_terms_M.html (Scroll down.) Read the definitions and examples. Then write what you think ...

**English**

If there are two independent clauses in a sentance, but one of the already has a comma, then should there be a semicolon before the conjunction? I just got a paper back from my english teacher and this sentance is one he corected: "Though some people believe that the ...

**Chemistry**

Photochemical reations (reactions that use light) are unique. In certain cases, reactions that are more dilute are more rapid than those that are more concentrated. Suggest an explanation for this observation. As the concentration of the photolyzed compound increases, ...

**novel= death on the ice english**

Does Wes Kean believe his men to be safe?

**bio II**

when very small viruses infect a plant cell by crossing a membrane, the viruses often spread rapidly throughout the entire plant without crossing additional membranes. Explain how this occurs. i think it has something to do with cytoplasmic streaming but i'm not sure........

**math**

what do we call the numbers that cannot be arranged into 2-row arrays? odd numbers Like I hate equations help me I can't figure them out What's the equation? what do we call the numbers that cannot be arranged into 2-row arrays

**literature**

i am writing an essay on fitzgerald's "babylon revisited" and i have to give examples of patterns of diction in the story. the teacher explained diction, but i would like a better defenition and examples please! Here are some websites that have good information ...

**Stoichiometry problem**

NacI and AgNo3

**A Geometry ?**

Given that two sides of a triangle are 20 and 66. Find the range of possible measures for the third side, s. a. 20<s<66 b. 46<s<86 c. 20<s<86 d.46<s<66 If you could tell me how to do this problem, i could do my next four. In the extreme cases, the ...