# Posts by sue

Total # Posts: 1,115

Science
You wish to make 1L of sterile lysis buffer soln. that is 10mM Tris-EDTA (pH 8) and 2% SDS. You have plenty of the following stock solns.: 2M Tris-EDTA (pH 8) and 20% SDS. However, SDS cannot be autoclaved and must be added to the soln. after autoclaving is done. Assume that ...

Math
Thank you!

Math
Solve for S: r^2s-5s=7. Solve for b: L= 4a^2b. I'm confused about how to solve these problems. Could someone show me the steps?

chemistry
What are the Kilojoules needed to melt 24.0g of ice at O degrees C, warm the liquid to 100 degree C and change it to steam at 100 degree C? Thank you,

chem
How many KJ are released when 75.0g of steam at 100 degree C condenses cools to 0 degree C and freezes at 0 degree C? I set it up like this but it is wrong, What am I doing wrong: 75g x 2260J/1g water x 1Kj/1000J =

Chem
What are the Kilojoules needed to melt 24.0g of ice at O degrees C, warm the liquid to 100 degree C and change it to steam at 100 degree C?

Chem
How many KJ are released when 75.0g of steam at 100 degree C condenses cools to 0 degree C and freezes at 0 degree C? I set it up like this but it is wrong, What am I doing wrong: 75g x 2260J/1g water x 1Kj/1000J =

physics
could you estimate the mass of the entire earth? How? If we cannot direct measure the earth's mass, how was it determined?

college algebra
10 1/2 of what number is 42.

college algebra
suppose you invest \$15,000 in two funds paying 11 1/2%and 14% simple interest. the total annual interest is \$1950. how much is invested in each fund?

college algebra
solve for C makeup: S=C+RC

physics
occurs when atomic nuclei decay

physics
flow of electrons in a conductor is called what?

Mth95
how do i figure that out by the info given?

Mth95
A canon placed at the top of a 15-foot rise fires a 16 pound ball with a vertical velocity of 172 feet per second. How far from the canon will the ball land? What is the max height of its trajectory?

Math
Find the area of the sector of the disk of radius r=15 ft and with arc length s=13 ft. When I did it it came out to .8666667, is that right or do I have to do 1/(13)(15) to get 1.15384571.

health safety & nutrition
measurements of height and weight provide useful information about: a.intellegience b.overall health status c.adult shape d.development age

I like math...and in

pre school
Considering storybooks with electronic features, educators believe that: a. they may be more educative than human read-alouds. b. they are not worth the money. c. they attract but do not hold toddlers attens for long. d. reading with a responsive adult is best.

phi 103
appeal to popularity

phy. science
what normally warms up faster when heat is applied?

early childhood literacy
c. they attract but do not hold toddlers attention for long.

american government
the presidents roles such as chief executive and commander in chief :

english
Need to find 30 corrections in this assignment.

american government
It can be said of regulatory commissions that: A.the commissioners pursue independent and impartial policies, regardless of politcal pressure from democrats or republicans in congress. B. unlike presidential appointees in other areas, regulatory heads choose which civil ...

american government
As distinct from the patronage and executive leadership system, the merit system for managing the bureaucracy A. allows the president to appoint top officials of executive agencies,thus making the bureaucracy more responsive to election outcomes. B. provides for a neutral ...

american government
According to James Madison, the source of most interest groups or factions is

government
judicial review is the power of the american courts to

home school and community
Describe three issues related to role confusion that a teacher may feel or may communicate.

english
What is the verb in the following sentence Her outgoing voice mail message sounds professional?

physics
The magnetic field at point 1 is 0.20 T directed north of east. The north component of this field at point 1 is most nearly (in T): -0.129 -0.153 -0.20 -0.035 0 -0.1 0.173

biography
Hi, im susan. I am currently in english honors and have to do a biography on someone i admire. The person i admire most right now is jeffree star. I have never really wrote a biography on someone. And could use some help. I don't know what to include about him and what to ...

math
The full question: The charge (in coul.) on an object increases according to q=(2 coul)e^[(o.05/sec)(t)], where t=time in sec. At how many sec. is the object deficient 1.56x10^20 electrons (from neutral)? A 0 B 12.56 C 21.94 D 28 E 42.21 F 50.5

math
its actually a physics question q=(2 coul)[1.56x10^20]^([0.50/sec][t]) t=time in sec.

math
actually the e is a variable with the value 1.56x10^20 So, I have to find X in [1.56x10^20]^(0.50/X)

math
How do i find X in e^(0.50/x) on a scientific calc? do I use LN, and if so, could you pls tell me how I can plug it in?

verbs
what are the verbs in this sentence? He suffered an injury to his knee and this is causing him pain and discomfort.

english
grdg

math 117
A launched rocket has an altitude in meters, given by the polynomial h+vt-4.9^2, h is the height in meters v is the velocity in meters per second and t is the number of seconds for which it takes the rocket to become airborne. If the rocket is launched from the top of a tower ...

Chemistry
What is the heat required in Joules to raise the temperature of 100.0g ice at -20 degrees C to steam at 120 degrees C?

Chemistry
What is the heat in Joules required to raise the temperature of 100g H20 from 288K to 308K?

chemistry
the density of a piece of wood is 0.638 g/cm3. The dimensions of the block of wood are 40.0 cm by 50.0 cm by 25.0 cm. What is the mass of the block of wood? Show all calculations.

algebra
simplify, and please show me how you did it. I am stumped. 24 divide 1/2 + 5/8 * 6/7 thank you.

macroeconomics
How much of a change in the economy will result if business increase their level of investment by \$8 billion and the MPC in the economy is 4/5? If the MPC is 2/3?

Physics
Glass of water has mass of 240g at room temp (25°C). Add 50g of 0°C ice. What final temp after ice is melted. (at equilibrium).

math
The mean time for running a mile is 450 se4conds with a standard deviation of 40 seconds. What time would you need to beat to be in the top 10%?

Statistics
length of time in minutes required to complete exercises is distributed with a mean of 60 minutes and a std. deviation of 8 minutes. what percent will require between 60 and 76 minutes to complete the exercises? what percent of participants will require more than 72 minutes to...

Chemistry
Which of the following statements are true? Fusion reactions result in nuclei with higher Z. To keep a nuclear power plant going, a chain reaction must be maintained. Nuclear fusion produces no long-lived radioactive by-products. The Sun is a nuclear fusion reactor. I tried ...

algebra
One week, you earned \$1350. Let x represent your total sales that week. Write an equation that could be used to find x.

survey of economics
How would you compute changes in Microsoft’s volume of output from one year to the next? How would price changes affect your computations?

Algebra II
are you sure 9 and 2 is right??

Algebra II
Can someone please help me with this problem. Given Matrix Y= 2 -7 4 and -1 1 0 Matrix Z= 3 4 1 4 2 -4 Solve for matrix X. X-2Y=3X+Z HELP PLEASE!!!

Chemistry
Approximately how much water should be added to 10.0 mL of 12.0 M HCl so that it has the same pH as .90 M acetic acid(Ka= 1.8 x 10^-5)?

Chemistry
The blank solution used to calibrate the spectrophotometer is 10.0mL of 0.2M Fe(NO3)3 diluted to 25.0mL with 0.1M HNO3. Why is this solution preferred to simply using de-ionized water for the calibration?

economics
What would happen to unit sales and total revenue for this textbook if the publisher reduced its price?

Math
I want to make a fence with a perimeter of 42 feet and an Area of 58 square feet. Label all sides of the fence.

finance
Anne is planning to attend college when she graduates from high school in 7 years from now. She anticipates that she will need \$10,000 at the beginning of each college year to pay for tuition and fees, and have some spending money. Anne has made an arrangement with her father ...

software

software
<?xml version="1.1"?> <reference> <author/>Compton, R.</author> <year>2010</year> <articletitle>SOA explained</articletitle> <journaltitle>Retail Management</journaltitle> <issue>vol. 14 no. 6, June<...

hardware
Hi i'm just stuck on this question. can please someone help me. Three cortrect ones are: A) A 9-bit word represents twice as many code words as an 8-bit word. B) mp4, mpg and bmp are all examples of video file extensions. C) A data rate of 4 gigabits per second means that ...

Math
Suzanne wants to put a fence around her square garden. If the garden covers an area of 64 ft2, how many feet of fencing does she need?

math
thank you

math
I don't understand the rules for adding and subtracting postive and negative ,can you please explain it to me? im having a test

Can you recommend a site where I can get some examples of prepositional prases?

sociology
This assignment is confusing me, is there anyone that can lead me in the right direction? The assignment is as follows. If appointed to head the U.S. Civil Service Commission, what polices would you propose to reduce radical ethnic strife in the U.S. and why? This assignment ...

math
In the trapezoid above, base R is 16 units and base S is 24 units. The trapezoid has a height of 9 units. What is the area of the trapezoid?

chemistry
write the formulas of the complex ion formed between a) the ligand, Cl-, and the platinum(II) ion with a coordination number of four. b) the ligand, NH3, and the nickel(II( ion with a coordination number of six. c)the ligand, ethylenediamine, and the chromium (III) ion with a ...

write the formulas of the complex ion formed between a) the ligand, Cl-, and the platinum(II) ion with a coordination number of four. b) the ligand, NH3, and the nickel(II( ion with a coordination number of six. c)the ligand, ethylenediamine, and the chromium (III) ion with a ...

early childhood literacy
not arbitrary symbols

Algebra
5/(6 x)-2/3 = 4-2/x

math
The length of a rectangle is 4 times its width. Express the perimeter, P, of the rectangle as a function of the width, w.

math
You flip a coin and toss a 1-6 number cube what is the probabilty of getting a 5 and tails

computer science
In the TCP/IP model, the best path through the network is determined at the ______________ layer. In the OSI model, the same function is carried out at the ______________ layer. A network access network B network access transport C internet network D internet transport E ...

computers
Can please help me, i'm stuck on thios question:- Q) Select the two true statements from the following list. A)In the OSI model, PDUs at layer 2 are called frames and PDUs at layer 3 are called packets. B)In an IPv4 packet header the Time-to-Live field is 8 bits. This ...

Math
50MB file is compressed using a compression ratio of 10. What is the compressed file size?

math
exmple of porportion and ratios in your daily lives.

computer science
can please help me to fill this: In the TCP/IP model, the best path through the network is determined at the ______________ layer. In the OSI model, the same function is carried out at the ______________ layer.

algebra
35+ 6 x < 20 -2

Algebra
35+ 6x <29-2

Math
Can please someone check my answer: a)385 data loss incidents took place b)110 million people were affected by personal data loss incidents c)3% of all data loss incidents were caused by hard copy theft/loss d)20% of all data loss incidents were caused by portable media theft/...

Computer science
can you please explain, i didn't get it. Thanks

Computer Science
Can please someone check my answer: a)385 data loss incidents took place b)110 million people were affected by personal data loss incidents c)3% of all data loss incidents were caused by hard copy theft/loss d)20% of all data loss incidents were caused by portable media theft/...

Algebra 2
Walking at 4km/h, Bruce can make the roundtrip between his campsite and Lookout Point in 2.5 h. Rowing on Crooked River, he can row upstream from the campsite to Lookout Point in 1 h and can row back again in 40 min. Find Bruce’s rate of rowing in still water and the ...

lab
i need 200mL of an 8 molar solution of dilute acid, and my stock cconcentrate is 18 molar, how much of the concentrate, and how much water will i need?

chemistry help
the rate constant (k) for a reaction was measured as a function of temperature. A plot of In k versus 1/T (in K ) is linear and has a slope of -1.01 x 10^4 K. Calculate the activation energy for the reaction. i don't know how to solve it???

algebra
If a pizza is 15.00 and the cost is 55.00 labor is 4.00 what is the equation to determine revenue?

social studies
1) how did the fact that fur trading companieswere econimic imperialists affect the development of westerm Canada? 2) how did the arrival of settlers in the West affect the fur trade? 3) describe the role played by Native peoples in the fur trade. 4) describe the role played ...

Computer Science
a)385 data loss incidents took place b)110 million people were affected by personal data loss incidents c)3% of all data loss incidents were caused by hard copy theft/loss d)20% of all data loss incidents were caused by portable media theft/loss e)15% of data loss incidents ...

computer science
What are the differences between VPN and private network?

geometry

Science/language arts
I need a poem that I need about lithosphere

Geometry
In a triangle labeled ABC with the following coordinates A(-3,2) B (0,4) C (2,-1) What is the image of each vertex? Give answer as an ordered pair.

Geometry
In a triangle labeled ABC with the following coordinates A(-3,2) B (0,4) C (2,-1) What is the image of each vertex? Give answer as an ordered pair.

Algebra 2
One of the the zeros of the functions F(x)= x^4+2x^3-13x^2-38x-24 is x=-3, find the other zeros of the function.

geometry

precal
are there solutions to x^3+27i=0 is so what are they?

precal help
Find a Parabola with Vertex (3,1) Focus (4,1) Find the vertex of 4y^2+4y-16x+13=0 Find the center of an ellipse 9x^2+4y^2-36x-24y-36=0 Find an ellipse with minor axis of 8 and vertices at (-9,3),(7,3)

PRECAL

PRECAL
Find a Parabola with Vertex (3,1) Focus (4,1) Find the vertex of 4y^2+4y-16x+13=0 Find the center of an ellipse 9x^2+4y^2-36x-24y-36=0 Find an ellipse with minor axis of 8 and vertices at (-9,3),(7,3)

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