Wednesday

April 1, 2015

April 1, 2015

Total # Posts: 2,923

**chemistry**

How many grams of Na2CO3 are required to completely react with 35.6mL of a 0.315M HCl solution? Na2O3(s) + 2HCl(aq) --> 2NaCl(aq( + CO2(g) + H2O(I)
*July 2, 2011*

**HS Science **

I have 4 questions 1 What is the equation for the acid ionization constant of HI? 2 Give the oxidation numbers of all atoms in NaMnO4 3 An atom changes its oxidation number from -2 to -5. Is it oxidized or reduced? How many electrons did it take to do this? 4 An atom changes ...
*June 30, 2011*

**biochemistry**

Why do you think the proximal and distal histidines are invariant between myoglobin, the alpha subunit and the beta subunit?
*June 30, 2011*

**statistics**

Thank you sooo much!! Also thanks for posting steps and not just an answer.
*June 30, 2011*

**statistics**

The proportion of baby boys born in the United States has historically been 0.512. You choose an SRS of 55 newborn babies and find that 47% are boys. Do ALL calculations to 5 decimal places before rounding. (d) In a random sample of 55 newborn babies, what is the probability ...
*June 30, 2011*

**calculus**

I see that someone else on here had the same problem, I wanted to find the solutions for 5xe^x+1 but its not really an equation.
*June 28, 2011*

**calculus**

If |2x - 1 | > 3 , then which of the following could not be a value of x?
*June 27, 2011*

**Physics**

A 36 kg box hangs from a rope. What is the tension in the rope if the following are true? (a) The box moves up a steady 5.0 m/s? (b) The box has vy = 5.0 m/s and is slowing down up at 5.0 m/s2?
*June 21, 2011*

**Chemistry**

Calculate the amount of energy required for the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 A, and the radius of the selenide ion is 1.98 A. Note that 1 A=10^-10m.
*June 17, 2011*

**Chemistry**

Calculate the amount of energy required for the formation of one mole of MgSe bonds (not lattice energy). The radius of the magnesium ion is 0.65 A, and the radius of the selenide ion is 1.98 A. Note that 1 A=10^-10m.
*June 17, 2011*

**Math**

A ball is thrown with an initial velocity of 10 m/s from a height of 2 meters. At what time does the ball hit the ground?
*June 17, 2011*

**physics **

A car goes at a constant velocity of 15 m/sec for 4 seconds. How far does the car go in that time?
*June 16, 2011*

**Claflin**

A reflecting, spherical Christmas tree ornament has a diameter of 8.0 cm. A child looks at the ornament from a distance of 20 cm. Describe the image she sees. image location in centimeters.
*June 13, 2011*

**physics**

This refers to the shuttle orbir question: my response to answers posted: So would I take the answer from the formula for a circumference of a circle(24900.26337) and divide it by 17,265 to get 1.442239408(~1.44h)? How I got the circumference: 2 x pi x 3963=24900.26337
*June 12, 2011*

**physics**

I also tried 180mi/51.3(t)=3.50877193h. Then i took 80mi/that answer to get 22.8mph. Is that the right approach?
*June 11, 2011*

**physics**

Would the time southbound be if I were to half 5.46? Or, I looked it up that it would take about 1 h 30 min from austin to san antonio. I ended up taking 80mi/1.5h=53mph. If thats not a good way to go about it, how do I figure out the time southbound?
*June 11, 2011*

**physics**

A student wanted to drive from Austin to san Antonio ,80 mi south of Austin on highway I35. Unfortunately he entered in the wrong direction and drove to waco-100 miles north of Austin –before he noticed his error. In waco ,he turned around,drove back to Austin and ...
*June 11, 2011*

**physics**

I took 1.91m x 100cm and got 191cm and then divided it by .000000047s and got 4,063,829,787 cm/s. Is that just about correct?
*June 11, 2011*

**physics**

An electron travels 1.91 m in 4.72x10^-8s. How fast does it travel? Answer in cm/s
*June 11, 2011*

**physics**

I tried 1.44 h, but I got the answer wrong. Can you please tell me what I may be doing incorrectly with the significant figures? thanks
*June 11, 2011*

**physics**

So would I take the answer from the formula for a circumference of a circle(24900.26337) and divide it by 17,265 to get 1.442239408(~1.44h)? How I got the circumference: 2 x pi x 3963=24900.26337
*June 11, 2011*

**physics**

The average speed of an orbiting space shuttle is 20100 mi/h. The shuttle is orbiting about 196 mi above the Earth’s surface. Assume the Earth’s radius is 3963 mi. How long does it take to circle the Earth? Answer in units of h ( hours)
*June 11, 2011*

**physics**

Thanks! I have one more question: how did you get the .717m for the man?
*June 11, 2011*

**physics**

A man jogs at a spee of 1.1 m/s. His dog waits 1.6s and then takes off running at a speed of 3.8 m/s to catch up with the man. How far will they each have traveled when the dog catches up with the man?Answer in units of m
*June 11, 2011*

**physics**

Two ants race across a table 70 cm long. One travels at 5.7 cm/s and the other at 3.99999 cm/s. When the first one crosses the finish line,how far behind is the second one? Answer in units of cm
*June 11, 2011*

**physics**

I multiplied 68.1 X 5.099043638x10^14=3.472448717x10^16 to get the ocean area. Then to get the average depth i took 1.21mix1609m=1946.89. Then i multiplied the ocean area and volume i got to equal 6.760475683x10^19. To get the mass, I took that answer and multiplied it to 1000...
*June 11, 2011*

**physics**

Assuming that 68.1% of the Earth's surface is covered with water at average depth of 1.21 mi. ,estimate the mass of the water on Earth. One mile is 1.609 km and the radius of the earth is 6.37 x 10^6 m. Answer in units of kg
*June 11, 2011*

**Chemistry**

How many grams of Mg are needed to react completely with 3.80 L of a 2.50 M HF solution? Mg + 2HF MgF2 + H2
*June 9, 2011*

**Elementary Statistics**

42/(39+42)= 51.85%
*June 8, 2011*

**Advanced Calculus 2**

Construct an example of two Riemann integrable functions whose composition is not Riemann integrable.
*June 8, 2011*

**Science**

Sorry! I meant what different types if energy!
*June 5, 2011*

**Science**

What are the different types of motion? I always get those mixed up and my older sister says that we will be studying that next year. Thanks for the help!
*June 5, 2011*

**Health**

thank u for answering, but can u please answer my two questions that I had asked?
*June 4, 2011*

**Health**

wht about crack cocaine and u never said that cocaine could be injected on the other post
*June 4, 2011*

**Health**

I did, so none of them can be injected or wht?
*June 4, 2011*

**Health**

Is Cocaine swallowed, smoked, snorted, or injected? Is Crack Cocaine swallowed, smoked, or injected?
*June 4, 2011*

**Health**

ik i did but idk
*June 4, 2011*

**Health**

which one is a picture of a person smoking Cocaine not Crack Cocaine
*June 4, 2011*

**Health**

Ms. Sue I need help finding a Picture of someone smoking Cocaine can u find a picture for me please?
*June 4, 2011*

**Health**

ok, so is cocaine swallowed, smoked, snorted, injected or what? AND THEN IS Crack Cocaine swallowed, smoked, snorted, injected or wht?
*June 4, 2011*

**Health**

I can't find the answer to my two questions.. What are the answers, Ms. Sue?
*June 4, 2011*

**Health**

Is Cocaine swallowed, smoked, snorted, injected? Is Crack Cocaine swallowed, smoked, snorted, injected?
*June 4, 2011*

**math**

A cat owner wants to put equal amounts of food into dishes. If she has 3as a hole number. 2 over 3 as a fraction unces of cat food how many ounces will each food dish get
*June 1, 2011*

**american history**

encomienda
*May 31, 2011*

**Math**

Find m<2 m<2 is 9x - 32
*May 30, 2011*

**Juwayria Highscholl**

An obsever is looking out to sea from the top of a building that is 30 m above sea leavel. He observera ship at an angle of depression of 10. How far is the ship from the foot of the bulding?
*May 28, 2011*

**Accounting 100**

Who can be harmed when a company changes its accounting methods too often?
*May 26, 2011*

**Pre algebra **

At the wintergrove amusement park you can purchase a season discount pass for 75$ that will allow a 10$ admission to the park all season. If you do not purchase a season discount pass, then the park admission is 35$. Determine the number of times you must visit the park with a...
*May 25, 2011*

**Pre algebra**

The width of a triangle is x-3 and the length is 2x-1. Write and solve an equation to find the perimeter and area of the rectangle if the measures of its length and width are in a 1:3 proportion
*May 25, 2011*

**Pre algebra**

Simplify 10w+6+3w
*May 25, 2011*

**Pre algebra**

Simplify (3c•7)•2
*May 25, 2011*

**Pre algebra**

simplify (0+9k)+k
*May 25, 2011*

**Pre algebra**

6k+10-4k-2k
*May 25, 2011*

**Pre-algebra**

9n+5-9-9n
*May 25, 2011*

**Pre-algebra**

Simplify the expression (8•5)•1
*May 25, 2011*

**Pre-algebra**

Simplify the expression 12q•0•q
*May 25, 2011*

**Geometry - plz help**

h=x b1=21cm b2=20cm area=225.5cm2 h=2(225.2)/(21cm+20cm)
*May 25, 2011*

**Pre algebra**

Kayla has a 41% grade average. On an exam that is worth 20% of her grade she gets a 100%. What is her grade now?
*May 25, 2011*

**Math**

Kayla has a 41% grade average. Then sha takes an exam that is for 20% of her grade and gets an 100%. What is her grade now?
*May 25, 2011*

**US history**

What actions did William Carney take that he became the first black recipient of the congressional medal of honor?
*May 24, 2011*

**Grammar**

Hailey hurt her leg... Bad or badly
*May 24, 2011*

**Grammar**

What is the difference between accept and except?
*May 24, 2011*

**U.S. History**

During the civil war, name three reasons each why the north's money value went down and why the south's money went even more down than the north
*May 24, 2011*

**Science**

The part of a cell that protects it from its environment is the...?
*May 24, 2011*

**U.S. History**

This isnt homework but I found out that I am related to kit Carson (great great great great great great uncle) I wanted to know more about him. Any information? Thanks a lot!
*May 24, 2011*

**8th grade science**

What is the reprodution in bacteria, prokaryotic cells, called? A. Mitosis, B. Binary fission, C. Interphase, or D. Fusion. Thank you for helping! I need this because it's for my 9 weeks exam study guide which counts for a whole lot of my grade. Thanks!
*May 24, 2011*

**Math(scientific notation)**

1)9.32E-7 + 1.32E+4 = 2)1.32E+4 + 1.04E+5/6.47E+4= 3) 9.93E+6/(9.32E-7)(1.32E+4)= I keep getting a different answer from the answer my teacher provided.
*May 24, 2011*

**Human growth and development**

Order from least effective to most effective against pregnancy. Condoms, abstinence, sponges, birth control.
*May 23, 2011*

**Pre-algebra HELP ME PLEASE**

A triangle has side lengths of (x+4), (4x-8), and (2x+8) units. If the perimeter of the triangle is at least 88units, what is the minimum length of each side of the triangle?
*May 23, 2011*

**math**

8 divided by 4=2 2•5=10 hope this helped!
*May 23, 2011*

**Pre-algebra (DESPRATE NEED OF HELP!)**

A triangle has side lengths of (x+4), (4x-8), and (2x+8) units. If the perimeter of the triangle is at least 88 units, what is the minimum length of each side of the triangle?
*May 23, 2011*

**Biology(HELP ME!!!)**

An average person blinks their eyes about 20 times per minute. Estimate the number of times a person will blink in 1 year.
*May 23, 2011*

**Pre-algebra**

7(3g-9)>6(5g-6)
*May 23, 2011*

**Pre-algebra**

8(2j-6)>2(4j-4)
*May 23, 2011*

**Pre-algebra**

3(4b+8)<132
*May 23, 2011*

**Pre-algebra**

-5(c+15)<75
*May 23, 2011*

**Pre-algebra**

-12(g+8)>24
*May 23, 2011*

**Pre-algebra**

6(p-8)>78
*May 23, 2011*

**Pre-algebra**

8(m+5)>-32
*May 23, 2011*

**Pre-algebra**

-9(f-6)<117
*May 23, 2011*

**physical science**

False, not ALL units of energy are vectors. Most of them are though
*May 23, 2011*

**physical science**

True
*May 23, 2011*

**calculus**

Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded above by the line y= sqrt 2, below by the curve y=secxtanx, and on the left by the y-axis. Rotate the region about the line y=sqrt 2. i also need to...
*May 23, 2011*

**2nd Grade Math**

You have 7 peices of bread. You take all of them and cut them in half. Then, you take the bread agian to make more halves which makes quarters of the bread
*May 23, 2011*

**Us history**

What is the Wilmot proviso?
*May 23, 2011*

**Grammar**

Alot or a lot?
*May 23, 2011*

**Pre-algebra**

8(4s-7)<6(2s+4)
*May 23, 2011*

**Pre-algebra**

-5(3e-2)<-2(6e+7)
*May 23, 2011*

**Pre-algebra**

-3(2b+4)>4(b+7)
*May 23, 2011*

**Pre-algebra**

48>3(w+7)
*May 23, 2011*

**Pre-algebra**

-12(c-6)<120
*May 23, 2011*

**Pre-algebra**

7(v+5)>56
*May 23, 2011*

**I really need help with biology!!**

1. cardiac 2. you wind up to pitch 3. is unlikely to incur bacterial infection 5. glucagon
*May 20, 2011*

**Social Studies**

i have a social studies project i just have a couple questions maybe you could help me with ?
*May 16, 2011*

**Statistics**

500.12
*May 15, 2011*

**Math**

if someone is born on Nov 01, 1998 how old are they in may 2011 or in 2011? shouldn't they be 13 but in my answer book the answer is 12. how come? im confued?
*May 14, 2011*

**Statistics**

If one card is randomly selected, what is the probability that the card selected is neither an ace nor a jack?
*May 14, 2011*

**Statistics**

A small gelateria has ten flavors of ice cream. They also have four toppings: crushed graham crackers, fresh strawberries, jimmies, and whipped cream. How many two-scoop sundaes can be made if the two scoops are different flavors and only one toppig can be selected?
*May 13, 2011*

**Statistics**

70% of Americans file their taxes electronically. For a group of 30 American adults who were selected at random, what is the probability that exactly 10 of them do not file their taxes electronically.
*May 13, 2011*

**statistics**

70% of Amerians file their taxes electronically. For a group of 12 American adults who were selected at random, what is the probability that at least five of them file their taxes electronically?
*May 13, 2011*

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