Saturday

December 20, 2014

December 20, 2014

Total # Posts: 168

**physics**

A cannonball of mass 3.67 kg is shot from a cannon at an angle of 39.51° relative to the horizontal and with an initial speed of 56.41 m/s. As the cannonball reaches the highest point of its trajectory, what is the gain in its potential energy relative to the point from ...
*February 20, 2011*

**math**

how to find the mean for reading 3 hours in 5 days
*February 8, 2011*

**Math**

Harry went to collect eggs from four chicken coops. At the first coop he collected the eggs and put them in the basket.at the next coop,he doubled what he had.At the third coop, he collected 6 more but dropped and broke two on his way to the fourth coop. At the fourth coop, he...
*January 23, 2011*

**physics/chem**

what is the relationship between density and specific heat capacity? and why? i thought when density increase specific heat increase but it says that it is inversely proportional. thank you
*December 1, 2010*

**Precalculus**

how would you solve this equation? please help! (x/2)LOG 7 = LOG 5 - xLOG 5
*November 15, 2010*

**4th grade math**

589
*October 29, 2010*

**physics**

Two blocks of masses m1 and m2 approach each other on a horizontal table with the same constant speed, v0, as measured by a laboratory observer. The blocks undergo a perfectly elastic collision, and it is observed that m1 stops but m2 moves opposite its original motion with ...
*October 5, 2010*

**algebra**

I have no idea how to do this problem. Find the product: z squared plus 7z-8 z sqaured-8z ------------------- X __________ z squared-64 z-1
*October 2, 2010*

**Math**

a grocery clerk nstacks three rows of can of fruit for a display, each of the top two rows has 2 fewer cans than the row beneath it, there are 30 cans altogether, how many cans are in each row?
*September 21, 2010*

**Geometry**

31 x 5
*September 21, 2010*

**Math**

How do I write an equation or an inequality for this: the product of a number z and 12 is 60
*September 21, 2010*

**history**

what factors most influenced colonial development and why?
*September 9, 2010*

**Math **

A donkey and a mule were carrying sacks of apples. The donkey groaned so the mule said to him: "Why are you complaining? If you gave me one sack, I would have twice as many as you; if I gave you one of my sacks, then we would have equal loads." How many sacks was ...
*September 5, 2010*

**chemistry**

Why will the pH of pure water at 25 degree celcius be equal to 7.0 ?
*April 11, 2010*

**chemistry**

Why will the pH of pure water at 25 degree celcius be equal to 7.0 ?
*April 11, 2010*

**chemistry**

Why will the pH of pure water at 25 degree celcius be equal to 7.0 ?
*April 11, 2010*

**physics**

What is a capacitor used for in a current other than just collecting energy?
*February 6, 2010*

**science**

Ugh. I dont know, I have this question for a science exam revieww! HELPPP.
*January 5, 2010*

**Phys**

The masses and coordinates of three spheres are as follows: 18 kg, x = 1.50 m, y = 1.50 m; 40 kg, x = -1.50 m, y = -1.50 m; 64 kg, x = 0.00 m, y= -0.25 m. What is the magnitude of the gravitational force on a 14 kg sphere located at the origin due to the other spheres?
*November 15, 2009*

**math**

Me and my mom are having an agrument about how to solve this problem. 27 / (5+4) * 19= she says the answer is 57 and I say the answer is 6 with a remainder of 9..can you please tell me who is right. Thank you.
*October 21, 2009*

**english**

I need help labeling complements in my sentences. I am not sure if I am doing this correctly or not. Could you please check to see if I have the following parts of speech labeled correctly? I must identify the subject, verb and complements. I must determinit if the complement ...
*September 6, 2009*

**physics**

What is a vibration? What is the relationship between period and frequency?
*August 15, 2009*

**English/Grammar Pronouns**

Summer Assignment: Would you say Do you know who will replace Erica and _I_ next week? Which word would you put in place if I is the wrong pronoun? me or myself, maybe?
*July 29, 2009*

**English/Grammar**

I have an English 10 Summer Assignment about grammar and such. One of the questions is: In the following sentence, which words are verbs? Melissa was worried about her job interview. a. was, worried b. worried c. worried, about I know that it's not c., and I don't ...
*July 29, 2009*

**anatomy**

What is the kcalorie value of a meal supplying 110g of carbs, 25g of protein, 20g of fat, and 5g of alcohol? Please help show work
*April 21, 2009*

**college, Microeconomics**

Yes those are the answers I got too! I just wanted to see if I was right.. Thanks
*April 13, 2009*

**college, Microeconomics**

(Daddy Warbucks employs workers in his perfectly competitive factory. Mr. Smith employs workers in his monopolistic factory as the only producer of the thing you really want. Given the following information, determine how many workers each firm will employ: The weekly salary ...
*April 13, 2009*

**chemistry**

Chemical reaction formulas of: 1.)Fe + H2SO4 2.)FeS + H2SO4 3.)CS2 + S
*February 22, 2009*

**chemistry**

What happens if you heat jic and iron together? what happens if you heat jic and iron sulphide together/
*February 8, 2009*

**algebra with pizzazzi**

Do Elephants know how to gamble
*December 5, 2008*

**AP Chem**

what is the hybridization of ClF3? and BrF3
*November 4, 2008*

**Chemistry**

The question makes no sense to me either and I have ask the teacher to clarify what it is he is asking. The DMSP stands for dimethylsulfoniopropionate. Marine algae produce this product.
*October 28, 2008*

**Chemistry**

What is the approximate depth integrated particulate DMSP quantity (in micromolar m-2) to 30 m? The DMSP at 30 m is approximately 11 nM.
*October 28, 2008*

**Biology A**

Charged molecules pass through the cell membrane through _______________.
*October 23, 2008*

**Biology A**

opps i meant an amoeba
*October 23, 2008*

**Biology A**

The process in which am amoeba engulfs its pray and takes it in is known as _________.
*October 23, 2008*

**Biology A**

In a ______________ __________________ the concentration of the solutes outside and inside the cell are equal.
*October 23, 2008*

**science**

In 1960 physicist Theodore Maiman constructed the first working laser.This design was improved upon Bell Telephone Laboratories in 1961.Since then lasers has been found to have a wide variety of applications.Identify one application of laser technology and explain how this ...
*October 12, 2008*

**math**

How can I solve this problem. A restaurant has 7 booths and 20 table. Write tth ratio of booths to tables as a fraction. Responses
*September 24, 2008*

**history**

How many words can you make with the letters from the word Constitution?
*September 17, 2008*

**chemistry**

5x10^-6mol N/L * 10^4 L 5x10^-2 mol N
*September 9, 2008*

**chemistry**

i forgot to include that there is 10^4 L of water. i have tried to work it out and came up with 5x10^-2mol N
*September 9, 2008*

**chemistry**

if the concentration of NO3- in the water is uniformly 5 microMolar, how many moles of N are there per square meter?
*September 9, 2008*

**English**

I have to write a one-page essay for my English class. Could you correct my essay and give a feedback? Thank you. Why is Dali so popular? – 1 page Salvador Dali quickly succeeded as an artist while he was alive, unlike other painters. His surrealistic works have religious...
*September 1, 2008*

**Critical thinking**

In your environment, what everyday items are treated aesthetically? For instance, a roll of plain white toilet paper is simply functional, but one decorated with floral patterns is more aesthetic. Consider your impressions of a hotel when the toilet paper end is folded by ...
*August 31, 2008*

**psychology - new! your thoughts**

This was very hepful. Thanks!!
*May 6, 2008*

**math**

what is the derivative of the integral of cos(x^4)+t dt from -2 to sin(x)
*April 29, 2008*

**math**

how do you find the answer to (2t-1)^3 dt on the integral from x^2 to x^3
*April 29, 2008*

**physics**

0.155 kg of water at 86.0oC is poured into an insulated cup containing 0.224 kg of ice initially at 0oC. How many kg of liquid will there be when the system reaches thermal equilibrium?
*April 23, 2008*

**physics**

A physicist, upon awaking one morning to find his stove out of order, decides to boil the water for his wife's coffee by shaking it in a thermos flask. Suppose that he uses 520 cm3 of tap water at 56oF, that the water falls 1.35 ft each shake, and that the physicist ...
*April 23, 2008*

**physics**

In a certain experiment, it is necessary to be able to move a small radioactive source at selected, extremely slow speeds. This is accomplished by fastening the source to one end of an aluminum rod and heating the central section of the rod in a controlled way. If the ...
*April 23, 2008*

**physics**

The system shown in the Figure is in equilibrium. The mass of block 1 is 2.2 kg and the mass of block 2 is 3.5 kg. String 1 makes an angle = 28o with the vertical and string 2 is exactly horizontal. what is the angle between the string that connects the masses and the string ...
*April 10, 2008*

**physics**

For the step ladder shown in the Figure, sides and are each ft long and hinged at . is a -ft long tie rod, installed halfway up the ladder. A -kg man climbs ft along the ladder. Assuming that the floor is frictionless and neglecting the weight of the ladder, find the tension ...
*April 10, 2008*

**chemistry**

How do I predict the formula for the ionic compounds when I combine? Cr(+3) and chlorate Na(+1) and carbonate K(+1) andsulfate
*March 12, 2008*

**chemistry**

How do I predict the formula for the ionic compounds when I combine? Cr(+3) and chlorate Na(+1) and carbonate K(+1) andsulfate
*March 11, 2008*

**final problem for checking**

x^3-x^2-6x greater than or equal to 0 x(x-3)(x+2)greater than or equal to 0 I figured that I have to factor first. Where do I go from here?
*October 6, 2007*

**need an answer checked - algebra**

Given a quadratic equation y = ax^2 + bx + c, (i) What is the effect of changing the value of the number c on the parabola? In other word, if two parabolas have the same coefficients a, and b, but different values for c, how will their graphs differ? My answer: If you have ...
*October 6, 2007*

**need an answer checked - algebra**

Given a quadratic equation y = ax^2 + bx + c, (i) What is the effect of changing the value of the number c on the parabola? In other word, if two parabolas have the same coefficients a, and b, but different values for c, how will their graphs differ? My answer: If you have ...
*October 6, 2007*

**algebra function**

Area of a window. A window is in the shape of a square of side s, with a semicircle of diameter s above it. Write a function that expresses the total area of the window as a function of s.
*October 6, 2007*

**Algebra answer for checking**

relation or function? x^2 = 1 + y^2 This is a function because relations cannot be an equation right?
*October 5, 2007*

**Algebra**

Find two positive real numbers that differ by 1 and have a product of 1.
*October 1, 2007*

**SCIENCE**

WHY IS THE SKY BLACK AT NIGHT?
*September 6, 2007*

**Math**

X = 200
*September 6, 2007*

**math**

1. COMBINE THE FRACTIONS ON TOP 2. COMBINE THE FRACTIONS ON BOTTOM BY COMBINE I MEAN ADD THEM TOGETHER THEN YOU WILL HAVE A FRACTION OVER A FRACTION TAKE THE BOTTOM FRACTION TURN IT UPSIDE DOWN AND MULTIPLY THE TOP FRACTION BY THE UPSIDE VERSION OF THE BOTTOM
*September 6, 2007*

**Algebra**

1. SUBTRACT 6x FROM BOTH SIDES X^2 - 6x = 0 2. NOW FACTOR OUT AN 'X' X(X - 6) = 0 3. SO X = 0 OR 6
*September 6, 2007*

**u.s. history**

what were the similarities and differences of the reform movements of the early 1800??? This site may help you find the similarities and differences. http://home.earthlink.net/~gfeldmeth/lec.reform.html This is a general overview of reform. http://www.sparknotes.com/testprep/...
*May 16, 2007*

**Biology**

What are code pieces of nucleic acids? (this is for a crossword puzzle and strangely polypeptides does not fit!) the spaces are: _ _ _ _ e _ _ _ _ _ _ What are the varients of a gene? (it's not diversity like I thought it should be) the spaces are _ i _ _ _ _ _ What are ...
*March 23, 2007*

**math**

what is an inequality? http://en.wikipedia.org/wiki/Inequality
*March 19, 2007*