Friday
May 27, 2016

Posts by Nikki

Total # Posts: 639

algebra
Solve the equation by a method of your choice: 6x2 + 5x + 1 = 0 If there are two solutions, separate the solutions by a comma.
June 6, 2011

Chemistry
2LiOH + CO2 yields Li2CO3 + H2O will the astronauts survive and how much water is made if there is 2.00 kg LiOh and expel 35kg of CO2?
June 1, 2011

geology
When astronauts brought back rock samples from the Moon, the minerals present were mostly the same as those found on Earth. Can you think of reasons why this might be so? Would you expect minerals on Mars or Venus to be the same, or at least very similar, to those on Earth?
May 25, 2011

lit
It's suppose to be incorrect that is why we have to rewrite each sentence correctly and use parallel structure.
May 19, 2011

lit
Perseverance is an obstacle that involves never giving up, maintaining a positive attitude, and the ability to trust others. how can this be written in parallel structure?
May 19, 2011

science
the moon's gravity is about one-sixth the gravity on earth. mar's gravity is about one half the gravity on earth. make a bar graph that shows your weight (95 lbs) in newtons on earth, moon, and on mars. A newton is equal to about one quarter of a pound.
May 12, 2011

English
whom
May 12, 2011

chemistry
2.50x10 to the second power mL of 0.100M NaBr
May 11, 2011

5th Grade Math
Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...
May 9, 2011

Math
Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...
May 9, 2011

Chemistry
How many grams of sodium azide are required to produce 31 grams of nitrogen
May 3, 2011

chemistry
what is the formula for hydrate copper(II) CHLOride Tetra-hydrate?
April 27, 2011

statistics
In prior investigations made by a local Gas and Electric Company, 65% of homeowners prefer to heat with gas instead of electricity. In a recent study of 200 homeowners 60% prefer heating with gas. In a two tailed test at a .05 level of significance can we conclude that the ...
April 26, 2011

statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their cars has declined since ...
April 11, 2011

statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their cars has declined since ...
April 11, 2011

statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their cars has declined since ...
April 11, 2011

5th grade Math
Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...
April 7, 2011

Physics
If a gas tap is turned on for a few seconds, someone a couple of meters away will hear the gas escaping long before he or she smells it. What does this indicate about the speed of sound and the motion of molecules in the sound-carrying medium?
April 6, 2011

Physics
Will a cyclist coast farther if the lamp connected to his generator is turned off? Explain.
March 30, 2011

Physics
Can an electron at rest in a magnetic field be set into motion by the magnetic field? What if it were at rest in an electric field?
March 29, 2011

Chemistry
I'm having trouble giving the formula for this coordination compound: sodium diamminetetrachloroplatinate(IV) I think that it has to have a charge because it has Na+ and [Pt(NH3)2Cl4] (which is neutral), but Na[Pt(NH3)2Cl4]+ is wrong. Please help!
March 26, 2011

Chemistry
Thanks, I got it right!
March 26, 2011

Chemistry
A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 x 10^-11 for Mg(OH)2 and Ksp = 6.0x10^-26 for Sn(OH)2. What [Sn2+] is required so that the [Mg2+] in solution will be 0.15 M?
March 26, 2011

physics
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.6 kg m^2. A second student tosses a 1.5 kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a distance of 0.40 s from the...
March 18, 2011

physics
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.2 . A second student tosses a 1.1 mass with a speed of 3.0 to the student on the stool, who catches it at a distance of 0.45 from the axis of ...
March 18, 2011

math
this can also be expressed as 15-20, which equals -5 so, +15 + -20=-5
March 17, 2011

algebra
36sqrt(2)
March 17, 2011

physics
Suppose partial melting of the polar ice caps increases the moment of inertia of the Earth from 0.331MR^2 to 0.332MR^2. What is the change in length of day in seconds?
March 17, 2011

physics
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.6 kg m^2. A second student tosses a 1.5 kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a distance of 0.40 s from the...
March 17, 2011

Literary Analysis and Composition
can you please tell me if these are right and if not could you please help? Like autobiographies, diaries are usually written in the privacy of one’s room. in the decades after one has important experiences. in the second-person point of view. -in the first-person point ...
February 16, 2011

physical science
What is Final Velocity? I don't understand it at all!!
February 2, 2011

chemistry
When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 22.8 g copper(II) oxide is used?
January 25, 2011

chemistry
What volume of a 3.00 M KI stock solution would you use to make 0.270 L of a 1.25 M KI solution?
January 23, 2011

Literary Analysis and Composition
respect for the power and wildness of the natural world. is outwardly embarrassed or clumsy but is a very different man on the inside. joyful animation allowing readers to experience Walter Mitty's daydreams more closely. Some people make up their minds and cannot be ...
January 20, 2011

Literary Analysis and Composition
could you please help with these questions? In works like "To Build a Fire," Naturalist writers such as Jack London advocated (Points : 5) trusting entirely in the wisdom and ingenuity of human beings. respect for the power and wildness of the natural world. ...
January 20, 2011

MATH
Which of the following sums is larger and by how much? (n=1) Y1 = 7 over Σ 15/4(pi/10)^n Y2= 11 over Σ 17/4(4/13)^n
January 20, 2011

MATH
what is the general term of the following series? 60/121-30/11+15-...+219 615/ 16
January 20, 2011

geometry
how can the slope formula help you remember the equation for the point-slope form of a line?
January 20, 2011

Calculus
Consider the function f defined by f(x)= sin x/x, x cannot equal 0 1, x cannot equal 0 a) At what points does the graph cross the X-axis? b) What is the relation between f(x) and tan x at points x cannot equal 0 at which f(x)=0? c) What is the behavior of f as the absolute ...
December 13, 2010

physics
d = __________________ m from where the first pulse originated please help me!!!!!
December 9, 2010

physics
A 13.5 m long wire of mass 173 g is stretched under a tension of 269 N. A pulse is generated at one end, and 16.5 ms later a second pulse is generated at the opposite end. Where will the two pulses first meet?
December 9, 2010

creative activities in other curriculum areas
which one of the following methods is preferred for teaching songs from recordings to young children? a-the phrase-wise method b-the whole-song method c-the combination method d-the strong-melody method
December 6, 2010

Chemistry
Convert: 5.72 kJ to kcal
December 2, 2010

geometry
a triangle has two sides that have lengths of 14 feet and 22 feet. which of the following lengths could not represent the length of the third side... A 8FT B 12FT C 14FT D 20FT
November 23, 2010

algebra
To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size of the habitat (in acres) polled. Write an equation using only one variable that could be used to ...
November 22, 2010

Algebra 1
The world record for the mile was 4:10 and 3:49 in 1975. Assuming that the record improves in a linear fashion (which it has so far) write an equation to predict the mile world record (in seconds) for a given year (y=record in seconds, x=year) What should the world record be ...
November 21, 2010

chemistry
A pH glass/calomel electrode was found to develop a potential of -0.0390 V when used with buffer of pH 5.52. With an unknown solution, the potential was -0.360 V. Calculate the pH of the unknown solution
November 17, 2010

Math
Can someone please please help me understand how to go about solving this? (not really answering it, but actually explaining it-pretty please?) "The zipper and the safety pin were invented in the 14th century. The safety pin was invented 44 years before the zipper. The ...
November 10, 2010

calculus
A street light is at the top of a 15 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 4 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole
November 5, 2010

Emergancy help!!!!!!!!!
Classify the model as exponential growth or exponential decay. Identify the growth or decay factor and the percent increase or decrease per time period. y=16(1.25)^t
November 4, 2010

Math
y=16(1.25)^t
November 4, 2010

Math
Classify the model as exponential growth or exponential decay. Identify the growht or decay factor and the percent increase or decrease per time period.
November 4, 2010

chemistry
what the balanved equation for gaseous sulfur dioxide reacts with water to form aq sulfurous acid (H2SO3)
November 4, 2010

AP Biology
I have two questions: 1. Why are action potentials usually conducted in only one direction along an axon? A. The axon hillock has a higher membrane potential than the terminals of the axon. B. The brief refractory period prevents reopening of voltage-gated Na+ channels. C. ...
November 1, 2010

chemistry
Calculate the pH at which the amino group of lysine is 20% dissociated. lysine side chain pka is 10.5.
October 25, 2010

Calculus
int(dx/(x^2+9)) u = x/3 Use the indicated substitution (above) to evaluate the integral. Confirm answer by differentiation. Okay, so I found that du/dx is 1/3. dx is 3du. Just by looking at the integral I can tell this is some form of tan^-1(x), if we change it to int(1/(x^2+9...
October 23, 2010

Physics Please Help
A spider sits on its web, undergoing simple harmonic motion with amplitude A.What fraction of each cycle does the spider spend at positions with x>0.75A? Hint: Use the analog of uniform circular motion.
October 21, 2010

Physics Please Help
A spider sits on its web, undergoing simple harmonic motion with amplitude A.What fraction of each cycle does the spider spend at positions with x>0.75A? Hint: Use the analog of uniform circular motion.
October 21, 2010

US history
thanks :)
October 21, 2010

US history
For what reasons was the Tweed Ring so notoriours?
October 21, 2010

6th grade
well what subject is it? maybe that could help
October 21, 2010

social studies
Thanks
October 21, 2010

social studies
How did the Chinese Exclusion Act nd the Gentleman's Agreement limit the Asian immigration?
October 21, 2010

chemistry
3.20/100=0.032
October 18, 2010

3rd grade
mr.mancho my great dane ate 125 hot dogs over a five day period. each day he ate seven more hot dogs than on the previous day. how many hot dogs did he eat on the first day.....
October 14, 2010

math problem solving
mr. mancho, my great dane, ate 125 hot dogs over a five-day period. each day he ate seven more hot dogs than on the previous day. how many hot dogs did he eat on the first day
October 14, 2010

english
did that help
October 12, 2010

english
My patient replied, back to me "I am good now and thank you very much."
October 12, 2010

Calculus III
x+3-(f) and use it in the verse vice way
October 12, 2010

US history
WE JUST COVERED THIS AT MY SCHOOL THE ANSWER IS 2
October 12, 2010

math
help people
October 12, 2010

math
what is 7 over 56 inn simplest form
October 12, 2010

Math
welcome i need help on my math Q so glad helped you
October 12, 2010

Math
did it help
October 12, 2010

Math
8+2=10+3=13 thats the answer
October 12, 2010

US history
its 1
October 12, 2010

Physics Please Help
A horizontal spring with k = 70 N/m has one end attached to a wall and the other end free. An 95 g wad of putty is thrown horizontally at 3.4 m/s directly toward the free end. Find the maximum spring compression.
October 7, 2010

Science
can u please help me unscramble "IRITONCF" and "LCRNEAU"
October 6, 2010

chemistry
What are the three chemical reasons for the large negative energy of hydrolysis of phosphoric acid anhydride linkage for compounds such at ATP, ADP, AND pyrophosphate?
October 6, 2010

chemistry
Can thermodynamic quantity, delta G, be used to predict the speed of a reaction in a living organism? Why and why not?
October 6, 2010

Biochemistry
the standard state free energy of hydrolysis of acetyl phosphat is G= -42.3 kJ/mol. Calculate the free energy change for the acetyl phosphate hydrolysis in a solution of 2mM acetate, 2 mM phospate and 3 nM acetyl phospahte.
October 5, 2010

chemistry
if 400 mL of 0.1 M NaH2PO4 is mixed with 100 mL of 0.1 M H3PO4 what is the pH of the buffer mixture? The PKa of H3PO4 is 2.1.
October 5, 2010

Geometry
How to solve: the measure of an angle is 12 less than twice the measure of its supplement. What is the measure of the angle?
September 30, 2010

Anatomy
A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results how an elevated eosinophil level. Which of the following organisms is most likely to cause her illness? A. Bacteria B. Worm C. Virus D. Fungus I think it's C...
September 26, 2010

Physics Please help
A 8.0×10−2 kg arrow hits the target at 25 m/s and penetrates 3.8 cm before stopping. What average force did the target exert on the arrow? What average force did the arrow exert on the target?
September 25, 2010

physics
that formula gets me a wrong answer...
September 25, 2010

physics
A 8.0×10−2 kg arrow hits the target at 25 m/s and penetrates 3.8 cm before stopping. What average force did the target exert on the arrow? What average force did the arrow exert on the target?
September 25, 2010

Chemistry
Anhydrous CuSO4 can be used to dry liquids in which it is insoluble. The CuSO4 is converted to CuSO4 x 5H20, which can be filtered off from the liquid. What is the minimum mass of anhydrous CuSO4 needed to remove 12.6 g H20 from a tankful of gasoline?
September 23, 2010

Calculus
(Another related rate question) A plane (alt. 4000ft) is flying west at 700ft/sec. A searchlight under its path, tracks it. How fast if the light pivoting when the plane is 1000ft east? --- Kind of similar to the lamp post question I posted earlier. I know dp/dt, 700ft/sec. We...
September 12, 2010

Calculus
(It's a related rate question) A man 6ft tall walks away from a lamp post (15ft) at 5ft/sec. How fast is his shadow lengthening? --- I have the picture, and the constants, the man and the lamp post. I have 5ft/sec as dw/dt, and I know I'm looking for ds/dt, the rate of...
September 12, 2010

sentences
Gold is measured in grams.
September 9, 2010

Math
Jane is 2mi offshore in a boat and wishes to reach a coastal village 6mi down a straight shoreline from the point nearest the boat. She can row 2mph and can walk 5mph. Where should she land her boat to reach the village in the least amount of time? I'm totally stumped by ...
September 5, 2010

physics
A vector representing 190 N is oriented at 38◦ with the horizontal. What is the magnitude of its horizontal component?
September 4, 2010

Anatomy & Physiology
A 32-year-old man has trouble tying his shoelaces, writing, and walking in a straight line. A computed tomographic (special x-ray) scan of the brain would likely reveal that the man has an abnormality in the A. cerebrum B. cerebellum C. brain stem D. diencephalon I'm not ...
September 3, 2010

Anatomy & Physiology
During an emergency room examination for an injured arm, the physician palpates the arm's entire length, starting at the shoulder and ending at the fingers of the hand. This process takes him from a/an ____ position. A. right to left B. proximal to distal C. anterior to ...
September 1, 2010

Anatomy & Physiology
A problem with the _____ plexus may cause pain in the posterior part of the thigh. A) Sacral B) Lumbar C) Cervical D) Brachial I'm thinking A but not quite sure
September 1, 2010

Algebra
the set of real numbers less than or equal to -4
August 28, 2010

Math
Find the solution to: Solve: 0.9x+9<_1.7x-8
August 20, 2010

PSY 240
I understand what sexual identity and sexual orientation are. That wasn't my question. The issue I am having is that my instructor is expecting a power point that summarizes the different perspectives on these topics. The problem I am having is that because it is an online...
July 7, 2010

PSY 240
Thank you Ms. Sue. While I'm still very confused about this assignment you are at least being more helpful than the instructor.
July 7, 2010

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