Wednesday

September 3, 2014

September 3, 2014

Total # Posts: 116

**math- Calc**

a spherical balloon is filled with water. if the water is leaking out at a rate of 2 cm^3/min, find the rate at which the radius is changing when the volume is v=1000cm^3?
*April 22, 2014*

**physics**

A football is thrown from the edge of a cliff from a height of 22 m at a velocity of 18 m/s [39degrees above the horizontal]. A player at the bottom of the cliff is 12 m away from the base of the cliff and runs at a maximum speed of 6.0 m/s to catch the ball. Is it possible ...
*February 23, 2014*

**chemistry**

Say you have two substances, A and B. A has a melting point of 300 degrees Celcius, while B has a melting point of 200 degrees Celcius. If you took a mixed melting point where the ratio of A is higher than B, what would the melting range look like? Would the melting point be ...
*January 25, 2014*

**physics**

A missile is fired horizontally with an initial velocity of 300 m/s from the top of a cliff 200.0 meters high. a. How long does it take the missile to reach the bottom the cliff? b. How far from the base of the cliff does the missile strike the ground?
*December 12, 2013*

**ALGEBRA 1 HELP**

Thank you it help a lot
*December 5, 2013*

**ALGEBRA 1 HELP**

Your hole punch makes holes in your that have diameter of 4^-1 inch. a.Write an expression for the area of one punched hole. Use the formula for the area of a circle A=:r^2. (: is pi sign) b.Your hole punch makes three holes in a page . Write an expression for the total area ...
*December 5, 2013*

**physics**

Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. The lasers produce separate interference patterns on a screen a distance 4.90m away from the slits a)What is the distance Δymax&#...
*October 26, 2013*

**physics**

A baseball is hit at a height of 1.1 m with an unknown initial velocity at 38 ° above the horizontal. It just clears a barrier of height 36.1 m at a horizontal distance of 63.0 m. Find: a) the initial speed;
*October 7, 2013*

**physics**

A baseball is hit at a height of 1.1 m with an unknown initial velocity at 38 ° above the horizontal. It just clears a barrier of height 36.1 m at a horizontal distance of 63.0 m. Find: a) the initial speed;
*October 7, 2013*

**physics**

A ball is thrown at 19 m/s at 41° above the horizontal. Someone located 30 m away along the line3 of the path starts to run just as the ball is thrown. How fast, and in which direction, must the catcher run to catch the ball at the level from which it was thrown? not quite...
*October 6, 2013*

**physics**

A ball is thrown at 19 m/s at 41° above the horizontal. Someone located 30 m away along the line3 of the path starts to run just as the ball is thrown. How fast, and in which direction, must the catcher run to catch the ball at the level from which it was thrown? not quite...
*October 6, 2013*

**Math**

Thanks but i already did them all cause noone was helping
*May 18, 2013*

**Math**

I posted these questions earlier a lot of times but noone answered them and i really need help so can someone help me. i dont want all the answers, can someone just do like the first 2 so i get an example of how to do them. thanks 1. represent each with an ineqaulity a.) time ...
*May 18, 2013*

**Math 4 questions**

I posted these questions earlier but noone answered them and i really need help so can someone help me. 1. represent each with an ineqaulity a.) time spent on the activity can be at most 13 mins b.) the volume of the container must be a minimum of 1.8 L and a max of 2.5 L 2. ...
*May 18, 2013*

**Math help urgent**

I have a few questions that i need help with so can someone pleese help me thanks:) 1. represent each with an ineqaulity a.) time spent on the activity can be at most 13 mins b.) the volume of the container must be a minimum of 1.8 L and a max of 2.5 L 2. in canada by law any ...
*May 18, 2013*

**science**

I can't find the answer. What is it? Thanks again!
*April 5, 2013*

**science**

prokaryotes and eukaryotes
*April 5, 2013*

**science**

how might the shape of the hairlike structures relate to their function? Thanks.
*April 5, 2013*

**chemistry**

The specific heat of a certain type of metal is 0.128 J/(g·°C). What is the final temperature if 305 J of heat is added to 53.3 g of this metal initially at 20.0 °C?
*March 3, 2013*

**TO MS SUE**

no it's not what i was looking for, but thanks anyway
*February 27, 2013*

**TO MS SUE**

Also Ms.Sue can you try and find me food web of the organsims affected my copper because I also need that in my project. A picture woule be great.
*February 27, 2013*

**TO MS SUE**

ms sue I got most of the answers but im stuck on this one, can you just tell me the answer, it will save my time and help me A LOT : what organisms are affected by copper? this is all i need, thanks :)
*February 27, 2013*

**SCIENCE **

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by copper? PLEASE HELP ME ON...
*February 27, 2013*

**SCIENCE URGENT HELP **

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by copper? pLEASE HELP ME ON...
*February 26, 2013*

**Science HELP**

i have the first 2 but not the rsest please help me
*February 26, 2013*

**Science **

what are some health risks of copper to humans? what are the environmental riks of copper? what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the ...
*February 26, 2013*

**Managerial Accounting**

Why is the salary of a production worker capitalized while the salary of a marketing manger expensed?
*February 20, 2013*

**maths**

Let be the center of the circle , and be a point outside of circle . is tangential to at , and intersects at . If and , what is the radius of .
*February 15, 2013*

**TO MS SUE**

oh ok thank you:)
*February 7, 2013*

**TO MS SUE**

REMEMBER WHEN I POSTED THIS QUESTION. 1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m? If paint caosts $29.95 per can and there is a 12% tax. How much would it cost to paint the ...
*February 7, 2013*

**Math**

OOPS oh so is this how you do it:: 29.95 x 3= 89.85x 1.12 = $100.632 i just have one question: where did the 1.12 come from?
*February 6, 2013*

**Math**

Hold it! im going to try this myself but i want someone to check if i did it right: 5.2 x 5.2 = 27.04 11 x 3= 33 You would need 3 cans of paint. 27.04 x 3 = 81.12 ok now im stuck... how do you do this part::If paint caosts $29.95 per can and there is a 12% tax. How much would ...
*February 6, 2013*

**Math**

1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m? If paint caosts $29.95 per can and there is a 12% tax. How much would it cost to paint the ceiling?
*February 6, 2013*

**physics**

A soccer player kicks the ball toward a goal that is 18.0 m in front of him. The ball leaves his foot at a speed of 19.3 m/s and an angle of 27.0 ° above the ground. Find the speed of the ball when the goalie catches it in front of the net.
*February 6, 2013*

**physics**

An airplane with a speed of 80.9 m/s is climbing upward at an angle of 64.5 ° with respect to the horizontal. When the plane's altitude is 795 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...
*February 6, 2013*

**physics**

A rocket is fired at a speed of 91.0 m/s from ground level, at an angle of 49.0 ° above the horizontal. The rocket is fired toward an 21.4-m high wall, which is located 25.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its ...
*February 6, 2013*

**physics**

An eagle is flying horizontally at 5.8 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?
*February 6, 2013*

**physics**

A tennis ball is struck and departs from the racket horizontally with a speed of 26.9 m/s. The ball hits the court at a horizontal distance of 18.1 from the racket. How far above the court is the tennis ball when it leaves the racket?
*February 6, 2013*

**Math HELP PLEASE**

1.My family went to starbucks. My daughter and myself ordered drinks that were the same price. My son's drink was 5.00 dollars more than my drink. The total bill was $18.50. How much was each drink? 2.There were candies on the table. Andy grabbed 50% of the total candies, ...
*January 12, 2013*

**american history 1865 to present**

social and political structure of the colonies and other pertinent factors
*December 16, 2012*

**math**

Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)
*November 26, 2012*

**Chemistry**

fgdf
*September 27, 2012*

**IB Math Studies**

I saw a similar post earlier. I also want to see who has better memory out of men and women. I was thinking of testing ability to remember a series of simple objects or number sequences. Could I use chi-squared, HOW could I use it? Any other sophisticated processes? thanks.
*September 18, 2012*

**Garde 12 Calc **

Determine the work done by force f=[1,4] in newtons for an object moving along the vector d =[6,3] Okay i found the vector equation and then the parametric and now i have no clue what do please help :)
*June 18, 2012*

**physics**

Two boys on skates push off from each other. The 40 kg boy moves to the left at 10 m/s. If the other boy moves to the right at 8 m/s, what is his mass?
*June 13, 2012*

**physics**

An object experiences an impulse, moves and attains a momentum of 200 kg m/s. If its mass is 50 kg, what is its velocity?
*June 13, 2012*

**physics**

a spacecraft is traveling in space fa from any planets or stars. How much force is required to maintainthe spacecraft's speed?
*June 13, 2012*

**ALGEBRA**

Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)
*May 6, 2012*

**health accounting**

explains the relationship between finance and accounting, and how they operate to determine financial viability within a health care organization.
*January 25, 2012*

**Chemistry**

How about from top to bottom?
*November 14, 2011*

**math**

whats the amount due today on 8000.00 at 7% from june 23. 2008
*November 9, 2011*

**Math**

Two faucets can fill a tank in 1 hour and 20 minutes. The first faucet takes more than two hours longer to fill the same tank when functioning without the second tap. How long does it take to fill each one separately? Explain your solution
*October 22, 2011*

**Physics help!!**

Assume: A 78 g basketball is launched at an angle of 56.8◦ and a distance of 10.4 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as described above. ...
*October 20, 2011*

**Science**

We made t-pentyl Chloride in Lab today using HCl and t-pentyl alcohol. I know t-pentyl chloride is not soluble in water, but I'm still not sure the answer to some of my post lab questions. I've answered a few, but I have 3 that still confuse me. We performed a water ...
*October 12, 2011*

**Physics**

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 35.4 m/s. At the same time, it has a horizontal velocity of 57.2 m/s. At what speed does the vehicle move along its descent path? At what angle with the vertical is its path?
*October 9, 2011*

**Physics**

A truck travels beneath an airplane that is moving 120 km/h at an angle of 24◦ to the ground. How fast must the truck travel to stay beneath the airplane?
*October 9, 2011*

**Physics**

An airplane ﬂies 137 km due west from city A to city B and then 412 km in the direction of 46.5◦ north of west from city B to city C. What is the distance between city A and city C? Relative to city A, in what direction is city C? Answer with respect to due east, ...
*October 9, 2011*

**Physics**

A person walks 28.2◦ north of east for 3.33 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk?
*October 8, 2011*

**Chemistry**

Helium gas is added to a 2.00 L container at 23 degrees Celsius containing Neon and Argon with a pressure of 725.3 mm Hg, what is the mass of Nitrogen added if the pressure is increased by 50%.
*September 18, 2011*

**Chemistry**

A 185.325 g sample of a compound of carbon, nitrgoen and hydrogen is burned completely. Calculate the empirical formula if 225.0 g of water and 230.0 g of NO2 is formed. In another experiment the sample was found to have a density of 10.9 g/L at 1.20 atm and 25.0 degrees ...
*September 18, 2011*

**Chemistry**

Nickel metal reacted with oxygen: Ni (s) + O2 (g) --> Ni2O3 (s). 95.00g of Nickel is reacted with 2.000L oxygen at 10.56 atm and 30.00 degrees Celsius. At the end of the reaction the pressure was reduced to 7.56 atm at the same temperature and volume. How many grams of ...
*September 18, 2011*

**Chemistry**

A piece of Na metal undergoes a complete reaction with H2O (l0 to produce sodium hydroxide and hydrogen. If 24.0 g of Na in a 3.50 L container is reacted with an excess amount of water at 25 degrees Celsius, calculate the total pressure (in atm) in the 3.50 L container when ...
*September 18, 2011*

**Chemistry**

Need help solving this problem. A 0.188g sample of unknown metal, X (s), produced 71.4ml of hydrogen gas when reacted with HCl according to the equation: X(s)+2HCl(aq)--> XCl2(aq)+H2(g) The gas was collected over water at 23 degrees C. The levels of water inside and outside...
*September 5, 2011*

**math**

Calculate the consumers' surplus at the indicated unit price p for the demand equation. HINT [See Example 1.] (Round your answer to the nearest cent.) p = 150 − q; p = 30
*July 15, 2011*

**calculus**

Calculate the left Riemann sum for the given function over the given interval, using the given value of n. (When rounding, round answers to four decimal places.) f(x) = e^−x over [−6, 6], n = 6
*July 12, 2011*

**Algebra**

Find the 20th digit of 1.8984375E-20
*June 23, 2011*

**college algebra**

I don't understand the steps for doing synthetic division in college algebra
*June 21, 2011*

**aiu**

Using the internet, the library, and your textbook, compare and contrast the rights of employees and the responsibilities of employers in the United States and Europe. Are the laws, customs, and cultures different? If Mary chooses to file a formal complaint with a government ...
*May 11, 2011*

**poem**

How do the differences and/or similarities between speech and poetic form affect the experience "In Memoriam"
*May 8, 2011*

**math**

find x for a triangle that has 100 degrees and 47 degrees.
*April 18, 2011*

**Physics**

Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness of the sail for which...
*March 10, 2011*

**Chemistry**

If a sample of oxygen-15 has an activity of 8000 becquerels, how many minutes will elapse before it reaches an activity of 500 becquerels?
*February 24, 2011*

**Mathematics**

The difference between the x-coordinates of two points on the parabola y^2=4ax is fixed at 2k. Find the equation that describes the position(xp, py)of the point of intersection P of the tangents at the two points. The equation is in the form yp^2=f(xp). Hence show that 4axp<...
*December 18, 2010*

**math**

You may find it simpler to rotate the curve and the line a quarter turn anti-clockwise around the origin. This gives y = x^2/4 and y = 1/2x + 2 They intersect at x = -2 and 4. Find the definite integral over the interval (-2, 4) of 1/2x + 2 - x^2/4. This gives 9 units
*December 15, 2010*

**Chemistry**

What is the pH when 25 mL of .20 M CH3COOH has been titrated with 35 mL of .10 M NaOH?
*November 29, 2010*

**chemistry**

if i have a molar concentration of acetic acid.046 mol/L how do i get the calculated molar mass of acetic acid
*November 18, 2010*

**8th grade math**

5%
*November 14, 2010*

**3rd grade**

10+10+0+0=20
*November 8, 2010*

**2nd grade**

7 mintutes. LABEL YOUR ANWSER
*November 4, 2010*

**College Geology Homework**

Suppose you have a sample of potassium feldspar from a rhyolite and you measure the ratio of atoms of 40Ar to 40K of 0.024 to 1, or for every 10000 atoms of 40K you find 240 atoms of 40Ar. For this problem, consider the decline of 40K from an initial value to the measured ...
*October 20, 2010*

**calculus**

Since the two tangents are mutually perpendicular and intersect on the y-axis they have gradients 1 and -1 The gradient function is y = 6x Hence x = 1/6, -1/6 So y = 1/12 both times So the coordinate of the intercept can be calculated using the equation of the tangents: Equate...
*October 3, 2010*

**algebra with pizazz pg 40 riddle**

-5-(15y-1)=2(7y-16)-y
*September 26, 2010*

**Calculus**

The absolute value of x is always positive; so is the square. So the shape will remain invariant under this transformation, and so will be its position.
*September 19, 2010*

**Social studies**

History of social studies in britain
*August 11, 2010*

**math**

REWRITE .25 AS A REDUCED FRACTION
*June 6, 2010*

**Chemistry**

what is the balanced equation of: Combination reaction: Li2O(s)+H2O(l)-->(?) I know what a combination reaction is but I don't know how to do it when it is complex like this one.
*April 20, 2010*

**geometry**

4#OUT OF 9#=ORDER? 4#OUT OF9#=ANY ORDER? EXM:1234?
*April 15, 2010*

**10th grade**

write the correct abbreviation for each metric init 1)kilogram 2)meter 3)Gram 4)milliliter 5)Millimeter 6)liter 7)kilometer 8)centimeter 9)Milligram
*April 4, 2010*

**Chemistry**

Determine the mass of antimony produced when 0.46g of antimony (III) oxide reacts with carbon.... (cont.)? ....occording to the following equation Sb2O3+3C ---> 2Sb+3CO please help me im soo lost, thank you!
*April 3, 2010*

**chemistry**

How many grams of gaseous required? If 0.260 mol of solid C and 20.0 g of solid TiO2 are reacted stoichiometrically according to the balanced equation, how many grams of gaseous Cl2 are required? 3TiO2(s) + 4C(s) + 6Cl2(g) → 3TiCl4(l) + 2CO2(g) + 2CO(g)
*February 17, 2010*

**English**

Is this a good thesis statement for an essay? If not, how should it be? In To Kill a Mockingbird, the auther Harper Lee chooses the protagonist Scout to be the narraotr of her novel because she is young, innocent and the narration is written in her adult perspective.
*November 22, 2009*

**calculus**

Equilateral triangle symmetrical about the y-axis means that the two sides which are the tangents have gradients -√3 and +√3. y' = -2x So the points of contact of the tangent to the parabola are (-√3/2, 9/4) and (√3/2, 9/4). Hence we can calculate ...
*September 23, 2009*

**Math**

1 2/4 + 1/3 =
*August 31, 2009*

**SCIENCE!!**

I love u guys for this
*January 28, 2009*

**algebra**

7n + the squareroot of n =18
*January 1, 2009*

**Maths/Physics**

From what I understand of this question if you keep breaking it in half you get: 4, 8, 16, 32, 64 etc. Which is 2^n+1 I'm just not sure where to go from there...
*November 18, 2008*

**Maths/Physics**

Is it possible to share a four fingered Kit Kat equally between 5 people if you can only break any one piece in half? Prove whether it is possible or impossible.
*November 18, 2008*

**chemistry**

What is the chemical composition of ozone, carbon dioxide, salt and water
*November 17, 2008*

**Business-Economics**

Describe any current or past news events related to wage inequality in the steel industry
*June 12, 2008*

**economics**

in general the role of board of directors is to: a) direct the day-to-day activities of the firm b) represent investor interests in management of the firm c) insure that the firm operates legally d)provide staff assistance to the CEO in strategic matters
*April 30, 2008*