Tuesday

July 7, 2015

July 7, 2015

Total # Posts: 933

**physics**

A uniform electric field of magnitude 339 N/C is directed along the +y-axis. A 6.00 µC charge moves from the origin to the point (x, y) = (-40 cm, -33 cm).What is the change in potential energy associated with this charge ?
*March 28, 2012*

**math**

yes, excellent, that is correct, as well as the answer
*March 28, 2012*

**algebra**

1st part 69m @ X+5mph 2nd part 23m @ X so,69m/x+5 + 23m/x = 2hours 69/x+5 + 23/x = 2 LCD ==> 69(x)+ 23(x+5)= 2x(x+5) 69x+23x+115=2x^2+10x 92x+115=2x^2+10x 0=2x^2-82x-115 wont factor, use quadratic formula x=(-b}ã(b^2-4ac))/2a x=-(-82)}ã...
*March 28, 2012*

**Geometry**

volume of a sphere (4/3)(3.14)Radius cubed, so, 4/3*3.14*6*6*6 = 904 cubic feet of water, but, you only want it "half" full 904*1/2=452.39 cu. ft. of water
*March 28, 2012*

**trig**

100cos10=x 100sin10=y <x,y>
*March 19, 2012*

**stuck**

wouldnt it just be 16.0m/s + 5.36m/s. Because the car had to be traveling faster than the other to push it? I might be wrong though so don't think mine is perfect. What class is this for?
*March 15, 2012*

**physics**

A ball on the end of a string is revolving at a uniform rate in a vertical circle of radius 98.8 cm. If its speed is 4.60 m/s, and its mass is 0.345 kg, calculate the tension (in newtons) in the string when the ball is at the bottom of the path.
*March 12, 2012*

**walter**

A positive charge of 1.5x10^-8 C experiences a force of 0.025 N to the left in an electric field. What are the magnitude and direction of the field?
*March 8, 2012*

**physics**

A 0.180 kg baseball, traveling 32.0 m/s, strikes the catcher's mitt, which recoils 13.0 cm in bringing the ball to rest. What was the average force (in newtons) applied by the ball to the mitt?
*March 7, 2012*

**math**

A customer is buying a $100 drill and two $15 drill bit sets. The customer uses a gift card worth $50 to pay for a portion of their bill. How much cash will the customer pay (before taxes)?
*February 27, 2012*

**Economics**

poop
*February 22, 2012*

**AP CHEMISTRY**

thanx very much!!!!!
*February 15, 2012*

**Geometry**

the answer is B. length of jane's garden is double the length of simon's garden
*February 15, 2012*

**chemistry**

A 141-mg sample was placed on a watch glass that weighed 9.203 g. What is the weight if the watch glass and sample in grams?
*February 2, 2012*

**Math**

Subtract: 7 gal 2 qt 1 pt – 5 gal 3 qt ½ pt I'm stuck plz help.
*January 26, 2012*

**Physics**

A water bed that is 1.5 m wide and 2.5 m long weighs 1055 N. Assuming the entire lower surface of the bed is in contact with the floor, what is the pressure the bed exerts on the floor? (Round to the first decimal point and don't forget units.
*December 19, 2011*

**Physics**

A cube of wood with a density of 0.780 g/cm3 is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood? (ρw = 1.00 g/cm3) a. 5.00 N b. 6.40 N c. 7.65 N d. 7.65 x 10^3 N
*December 19, 2011*

**math**

a 41 inch ribbon was cut into five shorter ribbons of equal length how long was each shorter ribbon
*December 7, 2011*

**chemistry**

magnesium nitrate decompses in water and releases ammonia gas. If 355ml of ammonia is produced at STP, whit is the mass of Magnesim nitrate that reacted. Equation is Mg3N2+6H2O=3Mg(OH)2+2NH3
*December 1, 2011*

**chemistry**

The radius of an atom is about 10,000 times as large as its nucleus. If the atom were enlarged such that the radius of its nucleus was 1 inch, what would be the radius of the atom in meters? I need the formula to follow so that I can solve this problem.
*December 1, 2011*

**Math**

2%, am i right?
*November 2, 2011*

**Math**

The annual interest rate on an investment is 8%. What is the quarterly rate? (a) 1% (b)12% (c) 16% (d)2% (e)3% Can someone help me figure out the formula for finding out the quarterly rate?
*November 2, 2011*

**math**

Aldo invested his savings in two investment funds. The $24, 000that he invested in Fund A returned a 1% profit. The amount that he invested in Fund B returned a 5% profit. How much did he invest in Fund B, if both funds together returned a 2% profit?
*October 26, 2011*

**Science Math**

7. Calculate the difference in the lung volumes of a male athlete who is 62 inches tall and a female athlete who is 56 inches tall. Show your work. (2 points)
*October 14, 2011*

**anaheim**

a glacier moves with a speed of 54m/s. how many years wold it take for the glacier to move 0.65 km? assume there are 365 days in a year
*October 14, 2011*

**cost accounting**

D A
*October 14, 2011*

**EXP 105 Personal Dimensions of Education**

Write two to three paragraphs briefly summarizing the theory and discussing at least two of the “Seven Intelligences” that apply most closely to you, providing examples to illustrate your point.
*October 10, 2011*

**Science**

I am making an essay about the conditions of our water resources and the issues concerning our water. What is a good title for the essay?
*October 10, 2011*

**Physics**

An unmarked police car traveling a constant 80 is passed by a speeder traveling 145 .Precisely 2.50 after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 1.80 , how much time passes before the police car overtakes the ...
*October 4, 2011*

**geometry**

Point T bisects RS. If R(-2,-5) and S(-14,-21), find the coordinates of point T.
*September 29, 2011*

**Physics 12th grade**

A farm tractor is pulling 2 pieces of equipment east, with each piece of equipment 25 north and south of the x axis. If it takes 50,000 N of force on each chain to keep the equipment moving, then what is the total force of the tractor in the x direction?
*September 26, 2011*

**Math**

For 31 hours of work you are paid $ 361.15. How much would you receive for 33 hours of work? (a) $ 372.80 (b) $ 384.45 (c) $ 42.65 (d) $ 11.65 (e) $ 384.54
*September 15, 2011*

**Math**

Choices are: (a) decimal (b) sum (c) vertically (d) horizontally (e) concentrically
*September 15, 2011*

**Math**

Like fractional notation, __________ notation is used to denote a part of a whole.
*September 15, 2011*

**Math**

When multiplying decimals, the decimal point in the product is placed so that the number of decimal places in the product is equal to the __________ of the number of decimal places in the factors. (a) product (b) sum (c) vertically (d) horizontally (e) and
*September 14, 2011*

**Math**

When writing decimals in words, write " __________ " for the decimal spot. (a) decimal (b) sum (c) vertically (d) horizontally (e) and
*September 14, 2011*

**Math**

Brand A grape juice sells at one pint for $1.65 and Brand B sells at 14 ounces for $ 1.44 . Which brand has the lower unit price? (one pint is equal to 16 ounces ) (a) Brand A (b) Brand B
*September 14, 2011*

**Math**

K thanks
*September 14, 2011*

**Math**

Sandy Sanders has an hourly wage of $ 15.00 and is paid time and one half for all overtime after 40 hours. Calculate Sandy’s gross pay for the week of August 13 for which she worked the following number of hours. Sunday: Monday: 8.5 Tuesday: 9.5 Wednesday: 6.25 Thursday: ...
*September 14, 2011*

**Math**

Ok thanks
*September 14, 2011*

**Math**

The list price of an item is $ 78.99 and the net price is $ 56.67 . Determine the amount of discount.
*September 14, 2011*

**Math**

Ok thanks
*September 13, 2011*

**Math**

The value of 25 coins, consisting of dimes and quarters, is $ 3.55. How many dimes are in the collection?
*September 13, 2011*

**Math**

Ok thanks
*September 13, 2011*

**Math**

John withdrew $ 500 out of his bank savings account. He spent $ 50 on a radio, and 3 / 5 of what remained on gifts for his friends. How much money did John spend on gifts for his friends?
*September 13, 2011*

**Math**

The value of 25 coins, consisting of dimes and quarters, is $ 3.55. How many dimes are in the collection?
*September 13, 2011*

**Math**

Round 0.000453 to the nearest thousandth.
*September 13, 2011*

**Math**

At 4 p.m., what part of a day has elapsed?
*September 13, 2011*

**Math**

Mrs. Hansen has 84 yards of material available to make school uniforms. Each uniform requires 3 / 4 yard of material. How many uniforms can be made?
*September 13, 2011*

**Math - Linear algebra**

Thank you, that was the answer I got too, but in a slightly different method, but I want to learn for how you figure this out, with this problem. I feel like you just you the same method but I am having a little problem with this one: "Suppose you want to make $5 using ...
*September 11, 2011*

**Math - Linear algebra**

Cats cost $1, dogs cost $15, and mice cost only $0.25. I want a herd of 100 animals, and I have $100, so being a cat lover, it's tempting to get only cats and mice. But I also want a dog, and my cat(s) want mice to "play" with, so the numbers of dogs, cats and ...
*September 11, 2011*

**Calculus**

If cos2 theta = 1/3 and 0 is less than or equal to 2 theta and 2 theta is less than equal to pi, find cos theta
*September 7, 2011*

**teacher aide language and other barriers**

to be a teacher aide in an esl classroom you should ? (a)have an ear for language(my answer) (b)recieve certifacation in esl instruction if possible (c)speak at least one other language besides english (d)have prior teacher aide experience in regular classroom
*August 26, 2011*

**Statistics**

The notion of statistical significance is frequently used in business to distinguish between true and spurious between-group differences (such as a difference between the response rates to two different promotions). Hence, when the difference between the baseline (no ...
*August 20, 2011*

**MATH**

cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I ask this question...
*July 15, 2011*

**MATH**

ok so I'm learning to solve problems like cos(x)=2 and sin(x)=5 I've wrapped my head around the process required to do so and I must say my brain is like @_@ mosh right now. Whenever I ask this question I never get a direct answer. I understand it's important to be...
*July 13, 2011*

**Law and Ethics**

Hi, I'm a incoming freshmen to a university. Over the summer I obtained the book that we would be using for a course. I have spent several hundred hours of self research and self teaching reading the whole entire book and solving every single problem in the book. It's ...
*July 12, 2011*

**MATHS**

Prove that one over one squared plus one over two squared plus one over three squared....... plus one over 1000 squared is smaller than two. Details please.
*July 9, 2011*

**Computer Science - MATLAB**

I guess it was skipped One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence...
*July 8, 2011*

**Computer Science - MATLAB**

One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a user input and ...
*July 8, 2011*

**help**

would he have to put it english
*July 6, 2011*

**help**

hi wanted to know if you guys could help my friend.the only thing is he justs writes in spanish
*July 6, 2011*

**QUESTION ABOUT JISHKA**

Do you guys have a tutor that specialized in computer science? I would expect that you guys would but I just wanted to make sure. I was wondering if any of the tutors knows the MATLAB programing language?
*July 6, 2011*

**Law**

for my CSE 1010 course I solved every single problem in my text book. Sense it's a electronic file I could easily publish it to the internet. My only concern is copyrights behind all of it. All work in the file is all my work, except for a few exceptions when I had to ask ...
*July 5, 2011*

**Law and Ethics**

Hi I have a question about law, like for civics and stuff... My neighbors foreclosed their house and completely destroyed their credit but saved a ton of money. I have recently got written permission from my neighbors to take some of their possessions inside that they left ...
*June 23, 2011*

**Chem**

Find [OH-] of 0.325 M (NH4)2SO4 and 0.490 M NH3
*June 21, 2011*

**chemistry**

which has a greater entropy: 300mL of hydrogen gas or 300mL of liquid hydrogen ?
*June 12, 2011*

**chemistry**

What is the IUPAC name for the following molecules: 1. CH3CH2N(CH2CH2CH3)CH2CH3 2. CH3CH2N(CH3)CH2CH3 I tried N,N-diethylpropanamine for the first one and N-methyl-3,4-ethanamine for the second one, but my instructor said they were wrong. If anyone could help me, that would be...
*May 28, 2011*

**Life orientation**

Yes
*May 22, 2011*

**Physics Calculation**

The weight of an apple near the surface of the earth is 1N. What is the weight of Earth in the gravitational field of the apple?
*May 14, 2011*

**physics**

i need to build a roller coaster, we can't use tubing to carry the ball so any ideas on what to use for the track? i was thinking no. 6 copper wire? i need to have 2 hills and a loop. how does this sound? 28" drop into a teardrop loop 12" high and back up hill #2...
*May 13, 2011*

**science**

i need to build a roller coaster but we can use tubing?? what can i use for a track
*May 13, 2011*

**chemistry**

SiH3- planar or pyramidal geometric shape?
*May 8, 2011*

**College Chemistry**

H2C=C=CH2 molecule is linear, what are they hybridization states of the carbon atoms? draw diagrams to show sigma and pi bonds.
*May 8, 2011*

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day ...
*April 28, 2011*

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day ...
*April 28, 2011*

**Chemistry**

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Do I ...
*April 27, 2011*

**Chemistry**

Please give me the formula for measuring turbidity. I already know about the wikipedia defintion and explanation. Thanks
*April 27, 2011*

**Chemistry**

Thanks, but I already knew about this.
*April 27, 2011*

**Chemistry**

What is the formula for measuring turbidity?
*April 27, 2011*

**Earth Science**

My experiment was to measure the float of a tongue depressor down a river. The mins it took the tongue depressor to float from point A to B and the depth of the river on those days. The meter represnt how depth/wide that point of the river was on that day. This is the raw data...
*April 25, 2011*

**Earth Science**

How do I ocnvert meters into cubic meters? For example: measuring areas and velocity I come up with this: area 1.55m x 27.47 = 42.74 velocity 21.9/172 seconds = 0.123 area x velocity = 5.22381 How do I convert 5.22381 into cms?
*April 24, 2011*

**Earth Science**

Ms. Sue, I coverted the minutes into seconds and here is what I got: April 4 172 April 5 160 April 6 126 April 11 77 April 12 59 April 13 70
*April 24, 2011*

**Earth Science**

This is the raw data we got from the river: The mins it took the tongue depressor to float from point a to b and the depth of the river on those days. Using area x velocity, I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters April ...
*April 24, 2011*

**Earth Science**

It is 2 minutes a 52 seconds.
*April 24, 2011*

**Earth Science**

I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.
*April 24, 2011*

**Physics**

i think the answer is big breasts
*April 15, 2011*

**Math**

compound and interest Using the below values please calculate the amount accumulated (future value) *Initial principal=$2000 *Interest Rate=9% *Number of years 7 *Monthly compounding
*April 13, 2011*

**history**

What does concessions mean in the following paragraph? What were the concessions? The leader of the Czech Nazi Party, Konrad Henlein, was urged by Hitler to demand that the Czech government make concessions to the Sudeten Germans. Henlein kept the pressure on the Czechs by ...
*April 12, 2011*

**Chemistry**

I'm actually not sure how to do any of it.
*April 3, 2011*

**Chemistry**

A 50.0 mL sample of 0.12 M formic acid, HCOOH, a weak monoprotic acid, is titrated with 0.12 M NaOH. Calculate the pH at the following points in the titration. Ka of HCOOH = 1.8 multiplied by 10-4. What is the pH when 50.0 mL NaOH is added 60.0 mL NaOH is added 70.0 mL NaOH is...
*April 3, 2011*

**Chemistry**

A 50.0 mL sample of 0.23 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, is titrated with 0.14 M KOH. Ka of CH3CH2COOH = 1.4 multiplied by 10-5. What is the pH at equivalence point?
*April 3, 2011*

**Chemistry**

thanks!
*April 3, 2011*

**Chemistry**

The Ka values of H3PO4 are shown below. Ka1 7.5 multiplied by 10-3 Ka2 6.2 multiplied by 10-8 Ka3 4.8 multiplied by 10-13 What is the pH of a 0.14 M solution of Na2HPO4?
*April 3, 2011*

**Chemistry**

A 22.3 mL sample of a weak monoprotic acid, HX, requires 50.0 mL of 0.040 M NaOH to reach the equivalence point. After the addition of 30.0 mL of NaOH, the pH is 5.30. What is the Ka of HX?
*April 3, 2011*

**Chemistry**

A solution is prepared by dissolving 130 g of NaNO3 in 100 g of water at 80°C. The solution is cooled to 0°C. How many grams of compound remain in solution? How many grams of solid are formed?
*April 3, 2011*

**Algebra**

What is the remainder when the sum of the first 102 counting numbers is divided by 5250?
*April 2, 2011*

**home economics**

thank you
*April 1, 2011*

**home economics**

I have to make a cold dessert. I am thinking of making a trifle. I am not sure whether we will be able to heat the custard, can I use cold custard? Or is there something else I could use instead of custard. Any help would be good. Many thanks.
*April 1, 2011*