# Lenny

Popular questions and responses by Lenny
1. ## Chemistry

In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by reactions involving carbon monoxide. Use the following thermochemical equations, Fe2O2(s) + 3CO(g) ---> 2Fe(s) +3CO2(g) ΔH° = -28kJ 3Fe2O2(s) + CO(g) --->

2. ## English(work cited page)

I am trying to cite an article in Rereading America, but it was written by the editors of the book. I am having a hardtime citing it. Also its suppose to be in MLA format.

3. ## physics

A hypodermic needle consists of a plunger of circular cross-section that slides inside a hollow cylindrical syringe. When the plunger is pushed, the contents of the syringe are forced through a hollow needle (also of circular cross section). If a 4.0- N

4. ## ph

An electron is located within an electric field, with a strength of 800N/C. What is the magnitude of the force on the electron?

5. ## calc

Give the starting value a, the growth rate r, and the continuous growth rate k. Round the answer for r to two decimal places Q = 0.414(e^0.885)^t a = ? r = ?% k = ?% I found a to be 0.414 but when finding the percentage for r and k I got stuck.

6. ## Math

A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 30 ft, find the dimensions of the window so that the greatest possible

7. ## literature

In invierno tardio by antonio colinas what is he comparing his spirit to? No es increíble cuanto ven mis ojos: nieva sobre el almendro florido, nieva sobre la nieve. Este invierno mi ánimo es como una primavera temprana, es como un almendro floroido bajo

8. ## chem

2Na(s) + 2H2O(l) ==> 2Na^+(aq) + 2OH^-(aq) + H2(g) What is the the net ionic equation because it doesn't look like their is any spectator ions.

9. ## algebra

Kenny buys mixed nuts at a corner market for per pound. The cost is a function of the number of pounds of nuts bought. What is the graph of the function? Is the function continuous or discrete?

10. ## chem

The molecular formula is: Na(s)+ H2O(l)---->NaOH(aq)+H2(g) This is showing a single displacement reaction.I am not sure how to show the complete ionic equation, this is what I have so far: Na+(s)+ H+ H+O2-(l)---->Na+OH-(aq)+H2+(g) Is this how you show it?

11. ## Physics

A ball (mass of 0.5kg) is suspended on a string that is attached to the ceiling. The ball is charged with an unknown charge q. Determine the magnitude of the charge on the ball if the electric field strength is 2000N/C, and the string forms an angle of θ

12. ## Physics

A ferry-boat is rectangular in shape, with an overall area of 30.0 m2. When the boat is loaded with gravel, it sinks to a depth of 2.8 m in the water. What is the total weight of the boat + gravel? Show your work.

29. ## Algebra 2

An archer releases an arrow from a shoulder height of 1.39 m. When the arrow hits the target 18 m away, it hits point A. When the target is removed, the arrow lands 45 m away. Find the maximum height of the arrow along its parabolic path. My points are

30. ## chem

The min. energy needed to break a C-Br bond is 288000mol^-1. If one has access to laser with 3 output wavelengths 266,1065,800nm, which wavelength(s) can be used to break that bond? I keep getting 417nm for the wavelength (which is none of the outputs) but

31. ## Chemistry

A student was given 100mL of HCL solution in a 250mL beaker and told that the HCL was 0.11M. The student was also given phenolphthalein indicator and 250 ML of 0.1234 M NaOH. The student first filled a buret with NaOH solution. The student then placed an

32. ## Math

Explain what benchmark you would use to estimate the number of people that can ride on a bus.

33. ## Algerbra 1

What is the order of √5 , -0.1, -5/3 , 0.7, √2 from least to greatest? A. 0.7, √2 , -5/3 , √5 , –0.1 B. √5, √2 , 0.7, -5/3 , –0.1 C. -5/3 , –0.1, 0.7, √2 ,√5 D. –0.1, 0.7, √2 , √5, -5/3

34. ## Algerbra 1

What is the simplified form of the expression? -(8d - 3w) A. 8d - 3w B. -8d + 3w C. 8d + 3w D. -8d - 3w

35. ## Physical Science

Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light is A. a stream of particles. B. a wave. C. heat.

36. ## Physical Science

Which kind of light is used to carry information through optical fibers? A. fluorescent B. sodium-vapor light C. laser

37. ## maths

identify and describe 3 environmental health hazards that causes ill health

38. ## math

Draw and label line BN. Draw and label point T on it

39. ## Physics

1. A 2.5kg rock is dropped from a 350m cliff. It hits the ground with a speed of 60 m/s. What percent of its mechanical energy was lost to air resistance? -the answer is 48% 2. A motor uses 5500J to lift a 35kg object a vertical distance of 12m. What is

40. ## physics-HS

Just as a car tops a 49 meter high hill with a speed of 77 km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill? plzzz help!

41. ## health informatics

how is emerging technology influencing healthcare? and give an example. all what i know is that they are basiclly new technologies and my example is about tissue engineering but the problem is that i don't know how it influences the healthcare!!! so please

42. ## Trig

The set of solution(s) of 2 cos^2 (θ) - 13 cos(θ) + 6 = 0 that is(are) in the interval (0,π/2) is one of following a. {π/6} b. {π/3} c. {π/4} d. {π/3, π/6} e. {π/6, π/4}

43. ## biology!!

why do Mountain dwellers have higher averages of hemoglobin than people living in coastal areas?

44. ## science-biology

A family member recently found out her child's blood group was AB+ yet hers is O+. i'm suppose to explain this oddity but i don't know how? so please help me!!! thanks

45. ## science-biology

A family member recently found out her child's blood group was AB+ yet hers is O+. i'm suppose to explain this oddity but i don't know how? so please help me!!! thanks

46. ## Sociology

Which sociological perspective holds the view that people create their social worlds through interaction and manipulation of symbols? A. Functionalist B. Conflict C. Interactionist D. Global

47. ## Chemistry

Compare and Contrast the atomic theories proposed by Democritus and John Dalton.

change 114/8 to a mixed fraction in simplest form

49. ## physics

A student bikes to school by traveling first d_N = 1.10 \rm {miles} north, then d_W = 0.500 \rm {miles} west, and finally d_S = 0.200 \rm {miles} south. If a bird were to start out from the origin (where the student starts) and fly directly (in a straight

50. ## SCIENCE - CLIMATE - ALBEDO

what is the connection between the amount of albedo and energy absorbed?

51. ## Physics

A race car traveling at 44 m/s is accelerated to a velocity of 22 m/s over an 11 s interval. What is the displacement of this time? (Could you show how you got the answer?) Thank you

52. ## math

I want to creat a line graph.My range is 40-140 for my y-axis, I wanted to know can I plot my graph so I start with 40. Imagine this is my graph can I start with 40 and increase with incraments of 5: 0,40,45, 50... If this is not correct then what is the

53. ## english( racism)

I am writing about racism in los angeles, and I have to use newspaper articles. I wanted to show that African earn less money than whites. Also their are more African americans behind prision bars. however, I cannot find anything along these lines. It has

54. ## chemistry

In my chemistry lab we decomposed lead (iv) oxide by heating it and then placing a wooden splint(test the evloved gas) into the mouth of the test tube. The color changed into red lead ( Pb304).Then we reheated the sample again and it turned to PbO. I do

55. ## Math

Simplify. -81^1/4

A Lesson Before Dying " I had gone to barbershops;I had stood on street corners, and i had gone to many suppers in the quarter.But i had never really listened to what was being said.Then i began to listen, to listen closely to how they taked about their

57. ## Math

150 students sat exams. The following elements were calculated ΣFX = 10200 Σ(x-μ)F = 196348 Determine the number of students whose marks were within 2 standard deviations of the mean score

58. ## civics/ minnesota state goverment

how many state constitutions has MN had?

59. ## Science

Describe briefly a general method that could be used to find the density of a substance. that the question im not quite sure of the answer some help would be nice.... thank you!

60. ## History

What factors motivated King Leopold of Belgium to seek ownership of the Congo region? http://en.wikipedia.org/wiki/L%C3%A9opold_II_of_Belgium Thank you for using the Jiskha Homework Help Forum. Hopefully you have a good history of the Congo. I'm sure we've

1. ## Math

XDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDd

posted on April 23, 2018
2. ## MATH

It’s actually 1.D 2.C 3.A 4.B 5.D On the quick check for connexus.

posted on March 15, 2018
3. ## word problem math

18

posted on March 7, 2018
4. ## CHEMISTRY URGENT!

PENILE ERECTION DYSFUNCTION

posted on April 24, 2017

c 2 and 5 trump broke the computer

posted on February 8, 2017
6. ## Math

The other part was triangle ABC. Side A had the number 8, Side B had 10, and Side C has 16.

posted on February 6, 2016
7. ## Math

What did you do to get 275?

posted on February 6, 2016
8. ## Chemistry

Correction: 3Fe2O3(s) + CO(g) ---> 2Fe3O4(s)+ CO2(g) ΔH° = -59kJ Is this right? FeO(s) + CO(g) ---> Fe(s) +CO2(g) ΔH° = -28/2 ΔH° = -14

posted on March 24, 2015
9. ## Chemistry

Is this correct? (x ^ 2) / 2.0 = 5.0 x 10 ^ -2 x = 3.162E-1 = [H +] = [H2PO3-] pH = -log (3.162E-1) = 0.50

posted on February 28, 2015
10. ## Chemistry

x^1 - 6.25E-3 + 2.0625E-4 = 0 x = {-(-6.25E-3) +/- sqrt[(6,25E-3)^2 - (4*1*2.0625E-4)]}/(2*1) x = -1.089E-2 (Not x) or 1.714E-2 pOH = -log(1.714E-2 = 1.76 pH = 14-1.76 = 12.24

posted on February 28, 2015
11. ## Chemistry

Is this the right answer? Kb = 1E-14 / 1.6E-12 = 6.26E-3 x^2/-0.033 = 6.26E-3 x = 1.436E-2 pOH= -log(1.436E-2)= 1.84 pH= 14 - 1.84 = 12.16

posted on February 28, 2015
12. ## CHEM UNI

helper look for my question and help me please

posted on February 6, 2015
13. ## math

is the answer 151 base 9

posted on February 6, 2015
14. ## math

anyone?

posted on February 6, 2015
15. ## math

sorry it was with base 9 in both numbers

posted on February 6, 2015
16. ## literature

okay thsnks

posted on January 20, 2015
17. ## literature

is he comparing his spirit to winter or to spring? that is what i am having a hard time finding.

posted on January 20, 2015
18. ## literature

It is not incredible how much my eyes see It is snowing on the flowery almond tree It is snowing upon the snow. This winter my spirit is like an early spring, it is like a flowering almond tree (check that word floroido because there is no such word!)

posted on January 20, 2015
19. ## physics

thanks a lot i appreciate it

posted on April 28, 2012

It should be groups of not times

posted on April 10, 2011
21. ## chemistry

no reaction

posted on April 5, 2011
22. ## English(work cited page)

Is this correct? Colombo, Gary, Robert Cullen, and Bonnie Lisle. “Learning Power.” Rereading America: Cultural Contexts for Critical Thinking and Writing. Ed. Gary Colombo, Robert Cullen, and Bonnie Lisle. 7th ed. Boston: Bedford/St. Martin’s, 2007:

posted on April 18, 2009
23. ## history

That's what I would go with.

posted on April 3, 2009