Friday

August 28, 2015
Total # Posts: 64

**science**

calculate the osmotic pressure at 18.5 degree celcuis of a suspension containing 30g/L of solid particles. each particle weighs 10^-9g.
*August 5, 2015*

**Algebra 2 (probability)**

Sara has 5 flower pots with a unique flower. The pots are arranged along a line. One day she decided to change their order the condition that no pots that were originally next to each other remain next to each other. Find out the number of possible orders satisfying the ...
*July 26, 2015*

**math**

Several studies have been conduct on the effectiveness and safety of the H1N1 influenza vaccine. One study found that in a group that received the actual medication, the drug was 87% effective. In a group that received a placebo, there was 10% effective rate. If the study used...
*July 14, 2015*

**physics**

A spring scale is calibrated from zero to 20. N. The calibrations extend over a length of 0.10 m. (a) What is the elastic potential energy of the spring in the scale when a weight of 5.0 N hangs from it? (b) What is the elastic potential energy when the spring is fully stretched?
*December 1, 2014*

**mathematics**

-(x-4)(x-1)+5(3x-1)(2x+1) expand and simplify
*March 23, 2014*

**math**

determine the equation of a circle that has its center a (0,0) and passes through each point. a)(6,-3)
*March 16, 2014*

**math **

state the corrdinates of the centre of the circle described by the equation. x^2+y^2=R^2 please help!
*March 16, 2014*

**Phyics**

A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. However, nothing is available with which to measure the length of the rope. Therefore, ...
*November 11, 2013*

**Phyics**

A 1390-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the magnitudes of the (b) ...
*November 10, 2013*

**physics**

a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each other (d)the 2 ...
*September 29, 2013*

**physics**

a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each other (d)the 2 ...
*September 29, 2013*

**chemistry**

If a student attempts to identify an unknown compound by methodused in this experiment. She finds that when she heated a sampleweighing 0.4862 g the mass went down appreciably, to 0.3067 g. Whenthe product was converted to chloride, the mass went up, to 0.3382g. a. Is the ...
*February 27, 2013*

**smitty**

is 8m cubed - 25 prime?
*January 31, 2013*

**crt 205**

final project topic: American Patriotism is Alive and Well
*November 24, 2012*

**Math**

40.80
*August 22, 2012*

**Chemistry**

Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g)<=> CS2 (g) + 4 H2 (g)
*April 15, 2012*

**algebra**

ben bought a car for $20,000 in 2003. The car depreciates at a constant rate of 21% per year . Find the price of the car in the year 2010 . Round to nearest dollar
*March 12, 2012*

**Probability**

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
*February 4, 2012*

**statistics**

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
*February 4, 2012*

**Math**

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
*February 4, 2012*

**Math**

Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
*February 4, 2012*

**Phi103**

What is the truth value of the sentence "P v ~ P"? (Points : 1) True False Cannot be determined Not a sentence 2. One of the disadvantages of using truth tables is (Points : 1) it is difficult to keep the lines straight T's are easy to confuse with F's. they ...
*December 12, 2011*

**math**

would you show me how you solved -110/11
*November 20, 2011*

**math**

Please divide if possible -110/11
*November 20, 2011*

**math**

please simplify 16/9
*November 20, 2011*

**Math**

4/3 x (4/3) If you multiply what would it be please show steps and answer
*November 20, 2011*

**math**

please help me solve by multiplication principle; -x/9=1/16
*November 19, 2011*

**math**

please simplify [5-5(2-4)]
*November 19, 2011*

**math**

when solving using multiplication principle -13x=273 how do i solve plus perform check
*November 19, 2011*

**math**

translate the phase to an alegebraic expression; John has $30.00 before spending N dollars on food how much money remains?
*November 19, 2011*

**math**

please help me solve and explain the answer 96+(-100)+773+(-297)+10+(-251)
*November 19, 2011*

**math**

please solve using the multplication principle -x/9=1/6
*November 19, 2011*

**math**

can you help me to find an equivalant expression without parentheses -(y-25)
*November 19, 2011*

**math**

So is -(y-25) is an equivalant expression without parentheses =25y
*November 19, 2011*

**Math**

how do I find a equivalant expression without parentheses -y(y-25)=
*November 19, 2011*

**Math**

I do not understand please explain for me solve for the indicate letter x=13+x, for x the solution is x =
*November 19, 2011*

**math**

Please explain this exercise and give answer y = 13+x, for x
*November 19, 2011*

**Math**

please help me to solve this problem -2 x(-7)x (-9)
*November 19, 2011*

**math**

-94+(-19)
*November 17, 2011*

**math**

44 more thatn Q algebraic expression
*November 17, 2011*

**math**

228.29056
*August 8, 2011*

**Math**

we need to fence off a rectangular section of land in order to make some huge play pens. All four sides will be fenced and there will also be 2 parallel fence lines inside the perimeter in order to make 3 identical fields. If we have 2600 meters of fencing, we need to ...
*February 24, 2011*

**math**

put these in order from least to greatest. 0.145,0.15,0.155,0.1 1/12,0.12,1/20,0.20,1/6,0.6,0.06,0.16 Can someone please help me somehow a tip would be more useful than the answer though
*November 17, 2010*

**Analytical Chemistry**

advantages and diaadvantages of potentiometris titration
*June 10, 2010*

**math**

An advertisement states that 8 thermometers cost 12.42 minus a 3% disc. Dr. wants to order a dozen to take advantage of the savings sales tax is 5%. What would the cost be? I divided 8 into 12.42 wich gives you 1.55 per thermometer 1.55 x 12 thermometers = 18.60 18.60+93 cent ...
*May 9, 2010*

**math**

How did you come up with (1.02)
*May 9, 2010*

**math**

John's account of 98.50 has been delinquent for 3 months. After 90 days office charges a 2% service charge, compounded monthly that is added to future bills. What would be the amount owed after 9 months? My math is 98.50 x 0.02 = 1.97 1.97 x 12 months = 23.64. Take 3 ...
*May 9, 2010*

**math**

supplies on invoice are 4 bottles alcohol @ 2.25 each = 9.00 3 thermometers @ 1.95 each = 5.85 6 boxes cotton @ .29 each = 1.74 6 bottles mouthwash @ .89 = 5.34 11 crtns cotton swabs @ .39 each = 4.29 3 hypo needles @ .39 each = 1.17 Dr. receives 3% disc, and sales tax is 6%. ...
*May 9, 2010*

**crt 205**

American Patriotism is Alive and Well
*August 9, 2009*

**Microeconomics: Budjet Constraint**

To be more clear, (20,0) to (7,0)
*August 6, 2009*

**Microeconomics: Budjet Constraint**

Sorry I should have said that fractional sushi rolls and cans of soda are possible. What I was thinking was, with soda on the vertical axis and sushi on the horizontal axis, we have a horizontal line at $7 on the vertical axis. So basically a straight line down at (20,0) till ...
*August 6, 2009*

**Microeconomics: Budjet Constraint**

You have decided to eat sushi for lunch and have a grand total of $20 to spend. Whatever money you have left over from buying sushi rolls will be spent on cans of soda to get you through the rest of the day. Your problem is to choose the best combination of sushi rolls and ...
*August 6, 2009*

**biology**

Whats "SA to V ratio"?
*December 1, 2008*

**biology**

1. Explain the problems that growth causes for cell 2. Describe how cell division solves the problem of cell growth
*December 1, 2008*

**Physics**

The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 3.50 105 Pa, and the horizontal divisions represent 2.00 10-3 m3. Determine the work done (including algebraic sign) in each segment of the path. (a) A ...
*April 20, 2008*

**Physics**

An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air? Ideal gas formula is...
*April 20, 2008*

**Physics**

An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and temperature raised to 30.5°C, what will be the pressure of the gas? Pa I used the formula n= (pv)/...
*April 20, 2008*

**Physics**

A jogger's internal energy changes because he performs 6.80 105 J of work and gives off 4.9 105 J of heat. However, to cause the same change in his internal energy while walking, he must do 8.10 105 J of work. Determine the magnitude of the heat given off while walking. J
*April 18, 2008*

**Physics**

An engine has an efficiency of 61% and produces 7900 J of work. Determine each of the following. (a) the input heat J (b) the rejected heat J
*April 18, 2008*

**Physics**

A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. -------------------------------------------------------------------------------- (a) How does the magnitude of the ...
*April 11, 2008*

**Physics**

that's what I have been working and keep coming up with either two answers 9.29 or 9.29 * 10 ^10 and the computer is telling me its wrong I don't know what else to do. Maybe I'm computing the number wrong.
*April 11, 2008*

**Physics**

A ruler is accurate when the temperature is 25°C. When the temperature drops to -16°C, the ruler shrinks and no longer measures distances accurately. However, the ruler can be made to read correctly if a force of magnitude 1.2 103 N is applied to each end so as to ...
*April 11, 2008*

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