# Questions Asked onSeptember 13, 2006

1. ## Physics

An athlete starts at point A and runs at a constant speed of 5.40 m/s around a round track 250 m in diameter. Find the x component of this runner's average velocity between points A and B. (answer is 3.44 m/s) Find the y component of this runner's average

2. ## Limit

Determine a region whose area is equal to the given limit. lim x-> infinity Sigma (n on top, i=1 on bottom) (2/n)*[5+(2i/n)]^10 I started with delta x=b-a/n =5-0/n =5/n The width of delta is 2/n so b-a=2 I'm not sure how you got 5-0/n The integrand looks

3. ## ESL-grammar

can anyone plz tell me what's the differences between past perfect tense and past perfect continuous tense?and tell me few examples of each one? Thank you for using the Jiskha Homework Help Forum. The past perfect tense is to show that something "had

4. ## Physics

I really would like to give some work on this problem, but I have no idea how to do it! Please help! An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 120 m above the level ground

5. ## to kill a mockingbird

who meets with atticus the weekend before tom robinson's trial begins? why? These are questions that you should be able to answer directly from the book. Please let us know what you think, and we'll give you feedback. =)

6. ## PHYSICS

A body of mass 100.0g is attached to a hanging spring whose force constant is 10.0 kN/m. The body is lifted until the spring is in its unstretched state. The body is then released. Using the law of conservation of energy, calculate the speed of the body

7. ## chemistry

If a solution of 0.10 M silver nitrate, AgNO3, is slowly added to a solution containing 0.010 M potassium iodate, KIO3, and 0.20 M sodium bromate, NaBrO3, what precipitate will form first. Will this precipitate form nearly completely (99%) before the

8. ## Math

What is the exact value of sin 5ð and how do you find it? type in the google search engine.. sin(5degrees) It will compute it for you. It appears you pasted something that the ASCII didn't translate. You'll need to type out the value for the angle.

9. ## math

what is the number feared by the pythagoreans I googled "number feared by the Pythagoreans" and checked the 3rd entry. This is what I found on that web site. Find the number feared by Pythagoreans, since it lies halfway between the only two integers that

10. ## Chemistry

The population of San Francisco is 750,000 in an area of 49 square miles. What is the population density in San Francisco? Express your answer in people per acre. ( 1mi(squared) = 640 acres ) 49 sq mi x (640 acres/1 sq mi) =?? acres. (Note that sq mi

11. ## physics

a 5.0kg concrete block accelerates down a 34 degree slope at 4.2 m/s^2. Find the coefficient of friction between the block and the slope. The component of weight down the slope is mg*SinTheta. The component of weight perpendicular to the slope is mg

12. ## direct variation

could someone please help me with these problems i am having trouble. If y=36 when x =6 find x when y = 42 If y=-18 when x=6 find x when y=6 If y =12 when x= 15 find x when y =21 If y=-6.6 when x=9.9 find y when x =6.6 If y=6 when x=(2/3)find x when y=12

13. ## Geometry

I need help with vertices! The vertices of triangle FGH are F(1,1), G(3,-5),H(6,0). Find the coordinates of the vertices after a refelection over the y-axis. I'm not sure how to do this. Is there a certain formula I need to know? The reflection across the

14. ## Physics

Light travels in a straight line at a constant speed of 300,000 meter per second. What is the acceleration of light? If it has a constant speed then it's not accelerating, is it? BTW I think it's 3x10^8m/sec or 300,000,000 m/sec. It would be 300,000km/sec.

15. ## physics

A 2.0kg block is sitting on a 15 degree incline. The coefficient of friction is 0.22. What is the minimum force needed to cause the block to accelerate UP the slope? The force applied has to be slightly greater than the force of friction (mu(mgCosTheta))

17. ## Science

Water and gasoline are both clear liquids at room temperature. Describe one physical property and one chemical property that might be used to distinguish between them. Plz help physical:smell chemical: pH value What about density? The density of water is

18. ## chemistry

"Newton's law tells us that Force= Mass x Acceleration. We also know that Energy = Force x Distance and Pressure= Force/Area. Using these relationships and table I-1 [I'll type it out], derive (do math stuff) the dimensions of newtons, joules, and pascals

19. ## Accounting

Patty Piper recently began a swimming pool chlorination service. She visits each of her clients on a weekly basis and applies chlorine gas and other chemicals to their pools. This service in not only convenient for her clientele but is actually less costly

20. ## math

what does 40-9 divided by 3x7+5=? Do you mean (40 - 9)/(3*7 + 5) ? If so then evaluate the numerator to get 40-9=31. Then evaluate the denominator to get 3*7+5=26. Then form the fraction using the two results. Was that the question?

asked by hey sry cant tell u my name!
21. ## math

Determine whether there are 2 consecutive odd integers such that 5 times the first exceeds three times the second by 54. Can anyone help??? We're asked: Determine whether there are 2 consecutive odd integers such that 5 times the first exceeds three times

22. ## physics

A child pushes a toy box 4.0m along the fllor with a force of 6.00N directed downward at an angle of 37.0 degrees to the horizontal. a. How much work does the child do? b. Would you expect more or less work to be done if the child pulled upward at the same

23. ## math

how do you turn fractions into decimals? what do you do with the remainders? example: 3/16---what would it be as a decimal? To turn a fraction into a decimal, divide the top number by the bottom number. Instead of a fractional remainder, you need to put a

24. ## social studies

What does A.D. and B.C. stand for and what do they mean?? A.D. stands for the Latin words, Anno Domini, which means "In the year of Our Lord." A.D. years, starting with 1 A.D. count from the supposed date of Christ's birth. B.C. stands for Before Christ

25. ## Look for poem

I'm looking for a poem, "Ending Poem", which is written by a Puerto Rican poet. i can't find this poem,anyone can help me plzzzzzzzzzzzz? This stupid site won't let me post the link so hers the poem enjoy! I am what I am. A child of the Americas. A

26. ## social studies

how did the new laws affect the lives of americans in the year following the civil war? the new laws affected the lives of the americans in many ways. for instance, ( um, what are the new laws? if i know i'll be able to answer the question. i'll be on

27. ## english

True or False: To talk in an abstract manner is to use easily understandable, concrete terms. Use http://www.answers.com to look up the words "abstract" and "concrete." Then let me know what you think. =) I think it is false? False is correct. =)

28. ## math

how can you get the answer 16 using these numbers 4,3,2,1=16 you can not use any number more than one time. Help! 3-1=2 2x2=4 4x4=16 Bold face type show numbers in the problem. please help You need to post a question before we can help. Just click on the

29. ## english

True or False: To talk in an abstract manner is to use easily understandable, concrete terms. I think it is false? I think so, too. I think Writeteacher answered this below, but yes, I think it's false too. The words abstract and concrete are generally

30. ## Physics

Bob runs a marathon (26 miles) in 4 hrs. Note 1609 is 1 mile. I found the average speed miles/hour which is equal to 6.5 mi/hr. I need to find meters/second? So 1609m/mi * 6.5mi/hr * 1hr/3600sec = ??m/s correct?

31. ## Physics

A force of 3.00N acts through a distance of 12m in the direction of the force.Find the work done. work= force *distance If force is in newtons, distance in meters, the work unit is in joules.

32. ## health

what are the pros and cons of eating healthy? http://www.google.com/search?q=healthful+eating&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official Lots of good websites here with oodles of good information. =) pros are living a healthy

33. ## science

What instrument measures very high temperatures-not looking for thermometer. Depending upon how hot the temperature is that you are trying to measure, you might use a thermistor, thermocouple, or optical pyrometer, to name just three. I have used an

34. ## chemistry

"Newton's law tells us that Force= Mass x Acceleration. We also know that Energy = Force x Distance and Pressure= Force/Area. Using these relationships and table I-1 [I'll type it out], derive (do math stuff) the dimensions of newtons, joules, and pascals

35. ## math

how do you isolate a variable? my teacher gave us questions and we are suppose to isolate the variable x PLEASE HELP! x + 3y = 11 You isolate it by moving everyting to the other side except that variable. Thus x + 3y = 11 is the same as x = -3y + 11 If tne

36. ## Math

Can someone explain to me.... when you are graphing number sets.... when do you use open/ closed cirles.... When do you use arrows?... What are intergers??? Thanks, ummm kbye

37. ## definition for science

the definition for longitude(meridians) The easiest thing to do is to look it up in the dictionary. Go to www.dictionary.com or to www.google.com The definition of coriolis Effect

38. ## to kill a mockingbird

which details help the reaer understand that the jail house is a symbol of maycomb's resistance to progress? These are questions that you should be able to answer directly from the book. Please let us know what you think, and we'll give you feedback. =)

Which of the following is not a characteristic of a crystal? a. The arrangement of the atoms in a crystal determines its shapes. b. A crystalline structure is always geometric. c. Crystals are classified according to their mineral content. Please do not

40. ## physics

a rock weighing 20.0N falls from a height of 16.0m and sinks 0.600 m into the ground. from energy considerations, find the average force between the rock and the ground as the rock sinks. (avg. force) x (distance sunk) is the3 work done by the soil in

What are two of many unconventional tasks that law enforcement officers have taken after 9/11? I have to dicuss how it relates to homeland security and their duties. Assistance please. Since this is not my area of expertise, I searched Google under the key

42. ## CHECK THIS OUT

"Drug use is information that is rightfully private and only in exceptional cases can an employer claim a right to know about such use." What are your thoughts? Please be aware that we are not here to do your homework or give you answers. Once you re-post

43. ## HEALTH AGAIN!! THANKS TO EVERYONE WHO ANSWERED ME!

DOES ANYONE KNOW ANY DISEASES ASSOCIATED WITH OBESITY?? MY HEALTH TEACHER IS WAY HARSH!! HE ASSINGED A ESSAY THE THIRD DAY BACK!! HOW CRUEL RIGHT? I WILL GIVE A THANKS IN ADVANCE TO ANYONE WHO ANSWERS MY QUESTION!! ] THANKS!!!!!;) :? Heart disease,

44. ## Physics

I need help on the following questions, I am stuck and not sure on what to do, can someone work it out and or tell me steps to obtain the answer. Thank you 1) A point charge of -0.90 microC is fixed to one corner of a square. An identical charge is fixed

45. ## math

please can u tell me the term to term rule to this question 0,1,3,6,10,15,21 {nth} thank u Those are the triangular numbers, except your sequence started with 0 and we usually start with 1. 0= 1*(1-1)/2 term 1 1= 2*(2-1)/2 term 2 3= 3*(3-1)/2 term 3 6=

46. ## math

everybody help!!!!!!!!!!!!i cant post it but its a graph and it do tomarow tell me wut a variable and wat i will dooooooooooooooooooo neeeeeeeee Well we'll need to know what the question is before we'll be able to help. So what is your question? well the

47. ## nature

hey guys i have hermot crabs that r realy realy realy sick!!!!!!!!! please help them!!!!there not moving there half way out of there shell !!!im scared!!!!!!any help? Thank you for using the Jiskha Homework Help Forum. First of all, where did you get your

48. ## PHYSICS

WHAT MEASUREMENT IS 60KG? Mass is measured in kilograms, kg. In metric, be careful of capitalization I would use flash cards to memorize units.

49. ## cultural diversity

My assignment is to create a table of leaders and legislation of the civil rights and black power movements. Can you help me find a good site that will help me do this. Thanks http://www.infoplease.com/spot/civilrightstimeline1.html

50. ## math

how do you measurement measure what?

51. ## Science

Why must chromosomes be duplicated before mitosis? DNA is the instruction of making proteins.To have a new cell that can work, it must has a replication of DNA.

52. ## making dot arays

what do we call #`s that can`t be arranged into 2 row arays? odd numbers. I learned that from Roger.

53. ## science

i need ti find a type of scentists that start with the letters j,w,and y help me? Is that three scientists: one starting with j, one with w, and one with y OR one scientist with Jwr????? wich is the largest see wich is the largest sea

List three things aboout Minerals of the Earth Crust Author Holt Rinehart & Winston

55. ## arrays

What do we call the numbers that cannot be arranged into 2-row arrays? odd numbers. I learned that from Roger. And the answer is the same as one several posts below. Giberra

56. ## biology

what is a hypothesis? http://en.wikipedia.org/wiki/Hypothesis

Which of the following is not a characteristic of a crystal? a. The arrangement of the atoms in a crystal determines its shapes. b. A crystalline structure is always geometric. c. Crystals are classified according to their mineral content.