Thursday

July 24, 2014

July 24, 2014

Total # Posts: 74

**analytical chemistry**

You are asked to make a 0.3M CaCl2 solution in a flask that can hold 200 ml. How would you do it?

**analytical chemistry**

How much NaOH (in grams) would there be in 0.25 litre of a 0.3M solution?

**physices**

an object is falling freely from rest of height of 65m above the ground what is the height of the object from the ground in meter when it reaches velocity of 20m/s?

**physics 1**

a helicopter is flying at an altitude of 1000 m above the ground, with a horizontal velocity of 50 m/s, how far from the rally point should the relief package be dropped?

**chemistry**

20mL ethanol(density=o.789g/mol) is dissolved in sufficient water to produce a 200mL solution. the density of the solution is 0.982g/mL. what is the molarity?

**Math**

What the next number should be? 6 18 20 10 30 32 16

**english**

Proper use of apostrophe in sentence: Oklahoma's dust storms in the 1930's blew away tons of soil. Correct?

**Algebra II**

The weight of a body varies inversely as the square of its distance from the center of the earth. If the radius of the earth is 4000 mi, how much would a 200 lb man weigh 1000 mi above the surface of the earth?

**math**

If you run 1 mile on Monday and then double everyday how many miles will you run by friday?

**Math**

Joe picked leaves, he has 3 kinds. He has 2 times as many elm leaves as maple leaves, and 5 times as many oak leaves as maple. He has 32 leaves. How many of each kind does Joe have?

**calculus**

pls integrate and differentiate e^x^2 and x/y square root of x^2+y^2 in terms of x.

**Research skills**

Place the following call numbers in the proper order based on the Dewey Classification A. 530 C68s 1985 B. 530.1 A12f 1976 C. 530.028 M52c D. 530 A82u 1988 E. 530.0274 C52e

**physics**

Sam is 180cm tall. He stands 60 cm in front of a tall plane mirror.How tall is Sam's image

**Chemistry**

Toluene, C6H5CH3, is a liquid similar to benzene, C6H6. It is the starting material for other substances, including trinitrotoluene (TNT). the molality of toluene in a solution that contains 26.2 g of toluene and 132 g of benzene. Calculate the molar fraction of toluene and be...

**Chemistry**

Toluene, C6H5CH3, is a liquid similar to benzene, C6H6. It is the starting material for other substances, including trinitrotoluene (TNT). Find the molality of toluene in a solution that contains 26.2 g of toluene and 132 g of benzene.

**Chemistry**

An aqueous solution is 0.257 m NaOH. What are the boiling point and freezing point of this solution?

**chemistry**

Calculate the vapor pressure lowering of water when 5.67 g of glucose, C6H12O6, is dissolved in 25.2 g of water at 25 ºC. The vapor pressure of water at 25º C is 23.8 mmHg. What is the vapor pressure of the solution?

**Statistics**

The distribution of scores on a test is mound-shaped and symmetric with a mean score of 78. If 68% of the scores fall between 72 and 84, which of the following is most likely to be the standard deviation of the distribution? 3, 1, 4, 6?

**algebra**

The diameter of an electric cable is normally distributed, with a mean of 0.8 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.81 inch

**statistics**

. An automobile is selling a new model car with an advertised in‐city mileage of 27 MPG. As with most car models, there is no associated measure of variability (variance, SD, etc.) included with the advertised MPG. You write the manufacturer and request details on variab...

**chemistry**

Luckily I can ask for more help tomorrow...lol Is the formula different for "how would you make 40mL of 30%ETOH starting with 75% ETOH and water" different (because it's all liquid vs. solid and liquid?) txs

**chemistry**

the question actually reads "how would you MAKE .25L of a 0025M solution of NaCL starting with solid NaCL and water? 2nd Q: ends with starting with 2.0M NaCL? Based on a lab that we haven't even had yet.....lost. txs

**chemistry**

Convert .25 L of a .025 M solution of NaCL starting with solid NaCI and water

**algebra**

: If Bobby fives Jane three pens, they have the same number of pens. But if Jane gives Bobby three pens,he will have three times as many pens. How many pens does each student have?

**physics**

To show your friends how strong you are, you start pushing a big container with mass 50 kg along a long, flat highway. While you are pushing the container in a horizontal direction with an average force 350 N, it moves with acceleration 1 m/s/s. After 5 seconds of pushing you...

**math**

find the sum of the square of -3 1 over 3 and the cube 3 over 2..

**math**

find the sum of the square of -3 1/1 and cube of 3/2

**Math**

Danny gave Rose $28 less than she already had. She now has $120. that means Rosario originally had how much????

**Finance**

How much is a 9 month CD worth that started out at $1,000.00 at 4.40% worth after 15 years

**History**

b is wrong

**chemistry**

(a) (i) Draw the abbreviated structural formula, in truncated form, of the compound that would be produced from the reaction of one molecule of glycerol with one molecule each of A, B and C .Circle and name the new functional group(s) produced. What type of reaction is represe...

**science**

Newton’s law of gravity is used with great success in most everyday situations, and indeed, in planning planetary space missions such as the Rosetta probe. However, Einstein’s theory of general relativity and a theory of quantum gravity are needed to describe the obs...

**alegbra**

The diameter of an electric cable is normally distributed, with a mean of 0.8 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.81 inch

**science**

The total power output of the Sun is about 3.8 × 1026 W, and the power-producing core has a radius of about 1.4 × 105 km (about 20% of the full radius of the Sun). Using these figures and your knowledge of the energy release in the proton– proton chain estimat...

**science**

The brightest galaxy in the Bootes cluster of galaxies is found to have a redshift of 0.13. (Assume the speed of light, c, is 3.0 × 10 8 m s−1.) (i) Assuming the Hubble constant, H0, is 70 km s−1 Mpc−1 to two significant figures, calculate the distance ...

**biology**

In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). The mechanism for inheritance of the sex chromosomes is exactly the same as for X and Y sex chromosomes in other species. In chickens the character of ‘barred’ or...

**biology**

A poultry farmer hopes to profit from the current craze for keeping egg laying chickens as pets and wishes to increase his stock of interesting and unusual breeds. (a) The farmer crossed a pure-breeding white chicken with a pure-breeding black chicken and found that 100% of th...

**business calculus**

For the function f(x) = 1/(x2+14x-42) there are two vertical asymptotes. Determine the x-coordinate of each one

**Physics**

A hydrometer is an instrument for measuring the specific gravity of a liquid. For example, producers of maple syrup use the hydrometer to find how much sugar is in the collected sap. Markings along a stem are calibrated to indicate the specific gravity for the level at which t...

**7th grade**

i need help in Math with Fractions can i have some pointer to remember it. P.s. Thank you guys if u can help

**Physics**

20 C

**physics**

a current-carrying wire is oriented at right angles to a uniform magnetic field. if the lenght of the wire is 0.50m and it experiences a force at 0.90n while carrying a current of 4.0a. what is the strength of the magnetic field?

**5th grade**

what is 1/5 of 10

**Physics**

This may seem tricky but the key to realize is that electric forces and gravitational forces = 0. In this case Mg=Eq since the charge floats in the electric field. there the equation = E=mg/q and that'll be your answer. (You can solve the math).

**Physics**

This may seem tricky but the key to realize is that electric forces and gravitational forces = 0. In this case Mg=Eq since the charge floats in the electric field. there the equation = E=mg/q and that'll be your answer. (You can solve the math).

**English**

I think condescending is a very nice choice. The author is not just being critical; he belittles the spies. They are not in the same league as James Bond; the author judges them with derision: "not only out of date; they were also out of their depth."

**English**

B is correct. The comma rule says to set an appositive off with a comma. Deep thinking is indeed in apposition.

**eng. lll analogies**

Prologue is before the story Epilogue is after the story Preface is before the novel Appendix comes at the end.

**Math**

The mean height of 20 boys and 14 girls is 161 cm. If the mean height of the 14 girls is 151 cm, calculate the mean height of the 20 boys.

**Math**

A small factory employs 7 experienced and 5 inexperienced workers. The mean monthly wage of these 12 workers is $700. Given that the mean monthly wage of 5 inexperienced workers is $602, calculate the mean wage of the 7 experienced workers.

**Math**

How do I find the Mean, Median and Mode from a frequency table?

**Math**

thanks for helping.

**Math**

How do i solve the following by factorization: 1) 7.7^2-2.3^2 2) 43*56+43*44 I know how to do these manually but not by factorization.

**Physics**

Compare magnetic and electrostatic forces. In what ways are they a) similar, b) different

**Chemistry**

What is the difference between organic acids and mineral acids?

**Math**

How to convert: cm to mm m to cm m to mm m to km km to m

**Physics**

Anyone can help me solve 2 of those problems A man lifts a box of books that weigh 185N. The box is lifted 0.80m. How much work does the student do on the box? A thermometer can measure temperature to the nearest enth of a degree. Which of the following readings gives the temp...

**Physics**

I need help with these three questions, thanks 1)The man lifts a box that weght 185N. The box is lifted 0.80m. How much work does the man do on the box? 2) 0.180kg ball falls 2.5m How much work does the force of gravity do on the ball? a)44J b) .45J c) 1.76J d)4.4J e) None of ...

**Physics**

I need help with these three questions, thanks 1)The man lifts a box that weght 185N. The box is lifted 0.80m. How much work does the man do on the box? 2) 0.180kg ball falls 2.5m How much work does the force of gravity do on the ball? a)44J b) .45J c) 1.76J d)4.4J e) None of ...

**Physics**

I need help with these two uestions, thanks 1)The man lifts a box that weght 185N. The box is lifted 0.80m. How much work does the man do on the box? 2) 0.180kg ball falls 2.5m How much work does the force of gravity do on the ball? a)44J b) .45J c) 1.76J d)4.4J e) None of the...

**4th grade**

Classify th triangle by its sides and then by its angles.

**Pre Calculus**

Write an explicit formula... 3,4/3,1,6/7,7/9 Can someone help me out?

**French**

Can someone tell me if these sentences are all grammatically correct? Merci! elle serait contente de nous conduire au magasin le 8 avril. Nous pouvons y emmener deux personnes.

**Statistics**

I need to do a project for ap stats. It can be anything im interested in, and i have to perform some tests and all that I need some ideas!! Somthing that would be interesting..

**Shakespeare**

Thanks for the help! The more I looked at it, the more confused I became!!

**Shakespeare**

I need help with the meter in Shakespeare's Sonnet 87. I know usually his are iambic pentameter, but with eleven syllables in each line I can't make that work. HELP.

**government**

you can run a search on google

**Vocabulary**

Everyone's busy

**Vocabulary**

Does anyone have the same Vocabulary book I do? It's about 3/4 the size of a textbook, with a orange cover with a blue pencil on it. If so, could someone please tell what the words are for Unit 3? Thank you!

**PHYSICS**

A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 2.65 m and mass 6.84 kg, find the torque the person must exert on the ladder to give it an angular acceleration of 0.301 rad/s2 We tried T = mr^2(alpha), but that was wrong. We a...

**PHYSICS**

The drawing shows a large cube (mass = 34 kg) being accelerated across a horizontal frictionless surface by a horizontal force P. A small cube (mass = 3.3 kg) is in contact with the front surface of the large cube and will slide downward unless P is sufficiently large. The coe...

**English**

Could someone tell me if the punctuation in this sentence is correct? We received a tour of the offices after which, we met in the conference room where Dick and Jane joined the group. Could someone tell me if the punctuation in this sentence is correct? We received a tour of ...

**English // The Scarlet Letter, Help!**

Dimmesdale to ease guilt: 1. Holds night vigils -- punnishing the body for the good of the soul. He goes without sleep. 2. He fasts 3. He keeps a bloody scourge in his closet and beats himself. .

**home economics**

what is the philsophy of home economics education? Wouldn't this vary with time, culture, and many other factors? And from school to school? I remember in the 1950's at the University...most subjects were taboo for women to take, such as engineering, business, math. Fo...

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