# Posts by Anna

Total # Posts: 2,686

Biology
I can't figure out these brain teasers: i.e.point act char er ILL GET IT

Calculus
I'm supposed to find the average value of the function over the given interval. f(x) = sin(nx), interval from 0 to pi/n, where n is a positive integer. I know the average value formula, and I know that the integral of that function would be (-1/n)cos(nx), but I keep ...

Geography
What is the easternmost nation of southern Europe?

math
what is the unit rates for a store that had 30 customers in 12 min.

Chemistry
A solution contains 0.55 g of dissolved Sn 4+ ions. How many grams of Na2CO3 must be added to the solution to completely precipitate all of the dissolved Sn4+?

AP Chem
okay so i think i did this question correct but i get a little confused with equivalence point. If there is 25 ml of a .300M solution of HNO2...when i set up my ICF table, does that mean there is 7.5 mmol of HNO2 and OH- in the equation HN02 + 0H --> NO2 + H20 since it is ...

AP Chem
Consider 25.0 ml of .300 MHNO2 that is titrated with .500 M Find ph at eq pt

AP Chem
1.513g of monoprotic acid (HX) is dissolved in water, and the volume is 250.0 ml after the dissolving. The solution was then titrated 38.12g of .100 M NaOH to reach the end point of the titration. What is the molecular weight of HX?

chemistry
what are metals and non metals that are found in the human body and their function?

chemistry
what are the applications of the silicon atom with its isotopes of 28,29,and 30?

chemistry
give at least 3 atoms with its isotopes and its application?

Chemistry
What mass of Helium will occupy 2 times the volume of 10.0 grams of Neon if both gases are measured at STP?

Chemistry
A gas mixture contains 4.00 grams of O2 and 4.00 grams of He. If the total pressure of the gas sample is 4.67 atm, what is the partial pressure of each component?

Algebra 2
You would divide everything by 3 leaving you with f-1(x)= x/3 - 4

Analytical Chemistry
How many millimoles and molecules of solute are in 500 ml of a solution that is 5.41 ppm KMnO4?

math
A hypothesis test is conducted with respect to the mean weight (in ounces) of potato chip bags form a certain manufacturer. The hypotheses are: H0:  = 0.8 and Ha:  ≠ 0.8. Which confidence level would support the conclusion that there is insufficient ...

math
two negatives make a positive

math
12

math
36

chemistry
55.85 g/mol

statistics
The power of a significance test for a particular value of the parameter is computed to be 0.93. Which statement below is true? a) The probability of committing a Type I error is 0.07. b) The probability of committing a Type I error is 0.93. c) The probability of committing a ...

statistics
An SRS of size n is taken from a large population whose distribution of income is extremely right-skewed and the mean income is calculated. Which of the following statements is false? a) When n > 30, the sampling distribution of is approximately normal. b) When n increases...

Physics
A metal plate has a charge density of 85uc/cm^2 : Calculate the electric field strength at 14 cm above the plate

chemistry
Is it okay taking caffeine then ascorbic acid?

physics
I'm guessing skater 3, since they have the most mass and speed. Try plugging them into its formula

child day care
You’ve decided to operate a day care home. Which one of the following factors is the most important in helping you make your decision? A. Your family is willing to share their living space with the children in the program. B. Your home seems to be large enough. C. You ...

Physics
Find the speed of sound (in m/s) at -35°C at 1 atm pressure in dry air.

Chemistry- intermolecular forces
When a benzoate ion goes through solvation, what is the intermolecular force involved? Is is hydrogen bonding?

math
the cost of travelling by bus is Rs10 for the first km and RS 3 for every additional km. how much must be paid for a journey of 20 km?

art history
what was the most important contributing factor to the rise of cities?

art history
how did monasticism and feudalism differ? give two examples

algebra
1/z+8/1/z-2

algebra

algebra
An investor invested a total of of \$2500 in two mutual funds. One fund earned a 7% profit while the other earned a 4% profit. If the investor's total profit was \$14, how much was invested in each mutual fund?

algebra
r^3+216/r+6=

algebra
f(x)=v^2+13/v^2-4v-32 Find all numbers that are not in the domain of the function. Then give the domain in set notation.

Physics
If you look at yourself in a shiny Christmas tree ball with a diameter of 9.0 cm when your face is 38.0 cm away from it, where is your image? (Your answer should be positive if the image is in front of the ball's surface, and negative if the image is behind it.)

algebra
A person needs to prepare 130 pounds of blended coffee beans for \$5.27 per pound. He plans to do this by blending together a high-quality bean costing \$6.50 per pound and a cheaper bean at \$2.50 per pound. To the nearest pound, find how much high-quality coffee bean and how ...

Microbiology
Why do you suppose Streptomyces griseus produces an enzyme that inactivates streptomycin? Why is this enzyme produced early in metabolism?

Civics

Civics
Is a trial of impeachment held with or without a jury? How about treaties? And murder?

math
what might you have if you don't feel well?

Algebra
A boat's crew rowed 7.5 downstream,with the current, in 1.5 hours. The return trip upstream against the current,covered the same distance,but took 2.5 hours. Find the crew's rate in still water and the rate of the current.

The oceans are so large that many people believe the oceans can absorb vast amounts of pollution without harm. Analyze the error in this concept, and explain how ocean pollution can affect human food supplies?

Physics
(a) A 2.20 cm high insect is 1.24 m from a 135 mm focal-length lens. What is the image distance? mm How high is the image? cm What type is it? (Select all that apply.) The image is upright. The image is inverted. The image is behind the lens. The image is in front of the lens...

counseling
Each student will write a paper on a specific DSM disorder (e.g., not anxiety disorders, but a specific aspect of a specific anxiety disorder. I am not sure what the instructor is wanting I want to do a paper on Attention Deficit Hyperactive Disorder (ADHD) but not sure what ...

Physics
Figure a is a partial graph of the position function x(t) for a simple harmonic oscillator with an angular frequency of 1.75 rad/s; figure b is a partial graph of the corresponding velocity function v(t). The vertical axis scales are set by xs = 2.50 cm and vs = 2.50 cm/s. ...

Physics
A physical pendulum consists of 3.8 m long sticks joined together as shown in Fig. 15-41. What is the pendulum's period of oscillation about a pin inserted through point A at the center of the horizontal stick? Who can help me with this problem?

Physics
A physical pendulum consists of 3.8 m long sticks joined together as shown in Fig. 15-41. What is the pendulum's period of oscillation about a pin inserted through point A at the center of the horizontal stick? Who can help me with this problem?

Physics
The 3.80 kg cube in Fig. 15-45 has edge lengths d = 5.50 cm and is mounted on an axle through its center. A spring (k = 1300 N/m) connects the cube's upper corner to a rigid wall. Initially the spring is at its rest length. If the cube is rotated 2.00° and released, ...

Physics
The 3.80 kg cube in Fig. 15-45 has edge lengths d = 5.50 cm and is mounted on an axle through its center. A spring (k = 1300 N/m) connects the cube's upper corner to a rigid wall. Initially the spring is at its rest length. If the cube is rotated 2.00° and released, ...

Living environment(please check thank YOU Ms.Sue)
ok its alright thank you for trying

Living environment(please check thank YOU Ms.Sue)
Cause: When hydrochloric acid backs up into the esophagus Effect: called Acid Reflux Cause: As a result of the acidic ph in the stomach Effect: help break down food Cause: As the epigolottis covers the larynx, Effect: I NEED HELP WITH THIS Cause: when reverse peristalsis ...

PHYSICS
As the distance of the object from the lens increases,what happens to the image size?

reed
Thank you :)

science
What is the effect as the epiglottis covers the larynx?

1-true 2-false 3-not enough info Transplanting genetic material into bacteria is a simple task- 2 Under certain conditions, bacteria reproduce at a rapid rate-3 The continued use of insulin from animals many cause harmful side effects in some people- 1 The bacteria used in ...

liviing environment
i need to write the number 1-true 2-false 3-not enough info

liviing environment
Transplanting genetic material into bacteria is a a simple task?

Chemistry
Draw a titration curce of 25.0 mL of 0.100 M aluminum ion (pKa=5.14) with 0.100 M NaOH. I am familiar with the process of drawing titration curves, however, I have never done an example with an ion (aluminum ion) rather than an actual acid. If anyone can please tell me how to ...

english 11
Tiffany is correct I got 100% on it.

science
The wavelength of a wave is 20cm.fifteen of these waves move past a point per second.calculate da frequency

physics
whoever already answered this question was very, very incorrect. your formulas may be, but your own calculations don't even come out to the numbers you have.

Chemistry
A sample of gas at 47 C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107 C and 0.789 atm?

Physics
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle è above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m its speed is v = 2.90 m/s, ...

Physics
A block rests on a horizontal, frictionless surface. A string is attached to the block, and is pulled with a force of 45.0 N at an angle è above the horizontal, as shown in Figure 7-23. After the block is pulled through a distance of 1.50 m its speed is v = 2.90 m/s, ...

ENglish
why does it make sense for us to form a parody of Romeo and Juliet?

microbiology
all coliforms ferment glucose but none of the media used for this test includes glucose why is glucose not used

Global History
what are the cultural diffusions between japan and korea

Economics
Can you tell me please if my answer is right to the following question? The question: present Adam Smith's theory of value and limitations. 1. Labor cost: he supported that everyone must produce his own goods using own labor and exchange the surplus with other goods. In ...

Economics - Edit question
Is my answer correct? The question: present Adam Smith's theory of value and limitations. My answer: Adam Smith supported three different views of theory of value 1. Labor cost: he supported that everyone must produce his own goods using own labor and exchange the surplus ...

chemistry
Cocaine is a non-electrolyte that has a molecular weight of 303.4 g/mole. How many grams must be dissolved in 25.0 mL of Chloroform (density = 1.484 g/mL) to raise its boiling point to 65.5 Celsius? The boiling point of pure Chloroform is 61.2 Celsius. Kb Chloroform = 3.62 ...

Chemistry
How do you calculate delta T for H2O?

chemistry
does this equal the same amount of moles of HO2CCO2H?

chemistry
weight of watch glass+funnel= 121.573g weight of watch glass+funnel+CaC2O4H2O=122.044 g how many moles of CaC2O4H2O were isolated during the experiment? related equations: HO2CCO2H + OH- -> -O2CCO2- + H2O Ca2+ + -O2CCO2- + H2O ->CaC2O4*H2O

English
What opportunities does the online community offer that the actual community doesn't?

English
Okay thank you. I do not need it anymore though.

English
Where do you find the editor of a certain article of a website? Where can you find the name of the organizatin that associated with the site??

Does anyone know any specific businesses who use the online community for business deals through online video chats, with those around the world, instead of face to face in the actual community?

Algebra
A ranger spots a forest fire while on a 45-meter observation tower. The angle of depression from the tower to the fire is 12 degrees. To the nearest meter, how far is the fire from the base of the tower? IS THE ANSWER 212 meters

Algebra
(x^9)^0(x^7)^2

Algebra
(x^9)^0(x^7)2

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 78 N the acceleration of the box is 0.46 m/s2; when you increase the force to 86 N the acceleration is 0.76 m/s2. (a) Find the mass of the box. (b) Find the ...

trig
If csc theta is equals to negative and theta is in the 3rd quadrant? a.find the other trigonometric function? b.find the value ofthe angle?

Living Environment
Explain why proteins are polymers but lipids are not.

English(Romeo and Juliet)
Capulet asks Nurse where Juliet has gone in the beginning of Act IV, scene 2. The Nurse indicates that she went to Friar Lawrence for confession purposes. Capulet responds by saying, "Well, he may chance to do some good in her. A peevish self-willed harlotry it is." ...

Living Environment
Can you find the latest Living Environment regents ?

English(Romeo and Juliet)
I need help with Romeo and Juliet Do you think it's appropriate to risk your life to be with another? Why do you think Juliet resorts to this? Explain In other words, what influences her decision?

Physics
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?

Statistics
A study was conducted to investigate relationships between different types of standard test scores. On the Graduate Record Examination verbal test, 18 women had a mean of 538.82 and a standard deviation of 114.16, and 12 men had a mean of 525.23 and a standard deviation of 97....

science
Runner A is initially 5.0 km west of a flagpole and is running with a constant velocity of 4.5 km/h due east. Runner B is initially 7.0 km east of the flagpole and is running with a constant velocity of 6.5 km/h due west. How far are the runners from the flagpole when their ...

Algebra1
Mrs.Culowski traveled 24.0 kilometers north and then 10.0 kilometers east. How far was she from her starting point? use pytheorn Theorm i need help seting up the problem?

Math Help
The length of an object in feet is equal to 3 times its length in yards. The length of a waterslide is 48 feet. Write and solve a multiplication equation to find the length of the waterslide in yards.

Biology
In human body, substances from blood filter through a membrane into renal tubule (kidney). What does an increase in the driving pressure correspond to?

Science
E = mc2 is a formula that shows, in mathematical terms, the relationship between energy and mass. In this formula, E is energy, m is mass, and c is the speed of light. The number 2 to the upper right of the c means that c is squared, or multiplied by itself.

Biology
What will happen to human red blood cells (crenate, lyse, or no change) if they are placed in the following solutions? 20% NaCl solution

Calculus-Related Rates
Three elementry kids are at a field day hula hoop contest. They were the last one standing of the heated competition. They have been hula hooping for 10minutes. Student1 (S1) is at point (6,5); Student2 (S2) is at point (6,1) while student 3(S3) is at (1,1). Finally, the gym ...

physics
A car stops for a red ligth. The light turns green and the car moves for 3 seconds at a steadily increasing speed. During this time, it travels 20 meters. The car then travels at a constant speed for another 3 seconds for a distance of 30 meters. Finally, when approaching ...

Physics!!!
A small sphere of mass m = 6.40 g and charge q1 = 30.3 nC is attached to the end of a string and hangs vertically as in the figure. A second charge of equal mass and charge q2 = −58.0 nC is located below the first charge a distance d = 2.00 cm below the first charge as ...

physics
a 2kg pendulum swings at the bottom of a 1m rope. hen the pendulum is at the bottom of the swing, it is traveling at 2 m/s. determine the tension of the rope