Tuesday
March 31, 2015

Posts by dan


Total # Posts: 937

phi 103
Which of the following may not qualify as a falsifiable claim? Student Answer: Your luck will improve. Your house will be sold tomorrow. Granite is more dense than sand. Smoking may cause heart disease
May 5, 2012

Earth & Space Science
Could someone please tell me what do you do in this class. I'm going to be a senior next year [High School] , & thinking of taking this class. And also if someone could tell me where to find notes for that class. THANK YOU!
May 2, 2012

AP CHEMISTRY
Could someone please tell me where to find the 2008 AP Chemistry Multiple Choice for FREE ONLINE? Thank You in advance!
May 1, 2012

phi 103
A claim is also said to be falsifiable, in that it could turn out actually to be false, and we know how that might be shown. For instance, "There are no wild kangaroos in Georgia" is a falsifiable claim; if we went to Georgia and found some wild kangaroos, we would ...
April 30, 2012

phi 103
I'm sorry, I gave the answer, "Granite is more dense than sand." It was marked as incorrect, I feel this must be an error. Thank you once again!
April 30, 2012

phi 103
Exactly, how I answered the question. Would you say this is answered incorrectly in the text?
April 30, 2012

phi 103
Which of the following may not qualify as a falsifiable claim? Your luck will improve. Your house will be sold tomorrow. Granite is more dense than sand. Smoking may cause heart disease
April 30, 2012

phi 103
Thank you!
April 30, 2012

phi 103
correct, but can always be revised necessarily true meaningless but fun correct and never needing revision
April 30, 2012

phi 103
strongly supported claim in science should be regarded as?
April 30, 2012

phi 103
If the word "should" appears in a sentence, that sentence will always involve an ethical claim
April 30, 2012

Chemistry
I am very confused about how to start this problem: A 29.8 mL sample of 0.354 M methylamine, CH3NH2, is titrated with 0.231 M hydrochloric acid. The pH before the addition of any hydrochloric acid is ?. The Kb of methylamine is 4.2x10^-4
April 28, 2012

Chemistry
How do I do this problem, I am very confused on how to even begin: An aqueous solution contains 0.167 M ascorbic acid (H2C6H6O6) and 0.194 M hydroiodic acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. [C6H6O62-] =? mol/L.
April 28, 2012

AP CHEMISTRY
A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e− -> Cu(s) I2(s) + 2 e− -> 2 I−(aq) The cell is operated at 298 K with [Cu+ ] = 2.7 M and [I− ] = 2.7 M. (a) Determine E for the cell at these concentrations. (b...
April 14, 2012

AP CHEMISTRY
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-] is 1.0 x 10^-2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^-10. (A) Assuming that the hydroxide is 1.0 x 10^-2 M, calculate ...
April 11, 2012

AP CHEMISTRY
For Ni its -0.28V & for Fe its -.440V Is it right?
April 11, 2012

AP CHEMISTRY
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-] is 1.0 x 10^-2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^-10. A. Assuming that the hydroxide is 1.0 x 10^-2 M, calculate ...
April 11, 2012

MATHEMATICS
how did u get those numbers?
April 9, 2012

MATHEMATICS
How do you find the average deviation from these numbers: 290 , 270 , 250 , 300 , & 290. I think their mean is 280
April 9, 2012

MATHEMATICS
A piece of notebook paper is about 0.0032 inch thick. If you begin with a stack consisting of a single sheet and double the stack 25 times, how tall will the stack be in inches? How tall will it be in feet? (Hint: Write and solve an exponential equation to find the height of ...
April 8, 2012

AP CHEMISTRY
A voltaic cell is constructed that is based on the following reaction. Sn2+(aq) + Pb(s) -> Sn(s) + Pb2+(aq) (a) If the concentration of Sn2+ in the cathode half-cell is 1.80 M and the cell generates an emf of +0.219 V, what is the concentration of Pb2+ in the anode half-...
April 6, 2012

PHYSICS
thanx!!
April 3, 2012

PHYSICS
Is it 32.57 cm?
April 3, 2012

PHYSICS
Allegra's favorite ride at the Barrel-O-Fun Amusement Park is the Flying Umbrella, which is lifted by a hydraulic jack. The operator activates the ride by applying a forcce of 72 N to a 3.0-cm-wide cylindrical piston, which holds the 20000. N ride off the ground. What is ...
April 3, 2012

Accounting
Presented below are selected financial statement items for Rowe Corporation for December 31, 2012. Inventory $55,000 Cash paid to purchase equipment $30,000 Cash paid to suppliers 154,000 Equipment 40,000 Buildings 400,000 Revenues 200,000 Common stock 20,000 Cash received ...
April 2, 2012

Chemistry
At 1 atm, how much energy is required to heat 39.0 g of H2O(s) at –22.0 °C to H2O(g) at 163.0 °C?
March 28, 2012

AP CHEMISTRY
The Kb for ammonia (NH3) at 25°C is 1.8* 10-5. By using the value of Kb, calculate ΔG° for the equilibrium
March 23, 2012

calculus
If the sun rises at 6 AM and is directly overhead at 12 noon, estimate the time (hour and minutes) when a 34-foot tree will have a 24-foot shadow.
March 23, 2012

AP CHEMISTRY
i still don't get the right answer i have like 1.54*10-14
March 20, 2012

AP CHEMISTRY
So do i plug in 270C in kelvin as my temp in the first formula???
March 20, 2012

AP CHEMISTRY
Consider the reaction. PbCO3(s)<--> PbO(s) + CO2(g). calculate the equilibrium pressure of CO2 in the system at the following temperatures.(IN atm) (a) 270°C (b) 480°C ..... delta Hf(KJ/mol).. d.Gf(KJ/mol).. S(J/mol-K) PbCO3(s)..-699.1 .. -625.5 .. 131.0 PbO(s...
March 20, 2012

AP CHEMISTRY
I really need this please!!!!!!! : write the equilibrium-constant expression and calculate the value of the equilibrium constant for each of the following reactions at 298 K. (a) NaHCO3(s)<--> NaOH(s) + CO2(g) Answer: Keq = PCO2 (b)Value of the Equilibrium Constant: ...
March 19, 2012

AP CHEMISTRY
I really need this please!!!!!!! : write the equilibrium-constant expression and calculate the value of the equilibrium constant for each of the following reactions at 298 K. (a) NaHCO3(s)<--> NaOH(s) + CO2(g) Answer: Keq = PCO2 (b)Value of the Equilibrium Constant: ...
March 19, 2012

Geometry
THINK IT'S: 2x^2-8x=0 2x(x-4)=0 x=0 or x= 4
March 19, 2012

AP CHEMISTRY
i added info in the last question in AP CHEMISTRY
March 19, 2012

AP CHEMISTRY
........ deltaHf(KJ/mol)...... d.Gf(KJ/mol)..... d.S(J/mol-K) NaHCO3(s) -947.7...... -851.8 ......... 102.1 NaOH(s).. -425.6 ...... -379.5 ........ 64.46 CO2(g) .. -393.5 ...... -394.4 ........ 213.6 Hope that helps
March 19, 2012

AP CHEMISTRY
write the equilibrium-constant expression and calculate the value of the equilibrium constant for each of the following reactions at 298 K. (a) NaHCO3(s)<--> NaOH(s) + CO2(g) Answer: Keq = PCO2 (b)Value of the Equilibrium Constant: Please help me find B
March 19, 2012

math
the lateral area of a pyramid that has a base 6 and height 8?
March 14, 2012

geometry
wat is lateral area if base is 6 and the right angle is 8
March 14, 2012

PHI103
strongly supported claim in science should be regarded as? necessarily true correct, but can always be revised
March 11, 2012

PHI103
@Ms Sue Thanks you make perfectly good sense. You "should" give yourself a pat on the back!
March 11, 2012

trig
If sec theta = radical 5, what is the exact value of cos theta
March 11, 2012

trig
If sec theta = radical 5, what is the exact value of cos theta
March 11, 2012

Chemistry
Calculate the equivalent mass of each of the following acids. a) HC2H3O2 b) KHCO3 c) H2SO3
March 8, 2012

US HISTORY
I need to end an essay on prohibition era and these are my subtopics: crimes, laws, and prohibition movements
March 7, 2012

US HISTORY
is there a limited amount on how much alcohol an industry can produce???
March 7, 2012

Chemistry
Mastering chemistry homework? Haha. E^(zero)cell= Cathode-Anode E^(zero)cell= 0.82V-.22V= 0.6V Delta G= -n*F*E^(zero)cell Delta G= -4*96485*0.6 Delta G= -231.564 J or -232 kJ
March 5, 2012

General Chemistry 1
Gaseous hydrocarbons, which contain only carbon and hydrogen, are good fuels because they burn in air to generate large amounts of heat. A sample of hydrocarbon with mass 1.48 g exerts a pressure of 1.32 atm in bulb with volume 967 mL at 21.5 oC. Molar Mass of this hydrocarbon...
March 4, 2012

AP CHEMISTRY
A 1.00-L solution saturated at 25°C with lead(II) iodide contains 0.54 g of PbI2. Calculate the solubility-product constant for this salt at 25°C.
March 3, 2012

Chemistry
pH = pKa + log([A-]/[HA])
March 2, 2012

World History! help please :)
It connects the black Sea to the Sea of Marmara. so your answer is accurate
March 2, 2012

AP CHEMISTRY
thanx
March 1, 2012

AP CHEMISTRY
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH. A) benzoic acid (C6H5COOH) Ka= 6.3*10^-5 for it
March 1, 2012

ALGEBRA II
factor (2x^2 - 48)
February 29, 2012

Trig
A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be angle x = 31° and angle y = 49°, as shown in the figure. (Round your answers to two decimal places.) Find the distance of the plane from point A. Find ...
February 29, 2012

ALGEBRA II
George jogged downhill at 6mi/hr and then jogged back up at at 4mi/hr. If the total jogging time was 1.25 hours, how far did he jog in all?
February 29, 2012

ALGEBRA II
does b=2???
February 29, 2012

ALGEBRA II
(3b-2)/(b+1) = (4)- (b+2)/(b-1) The (b+2)/(b-1) is separate from the 4. the 4 isn't included in the division
February 29, 2012

logic application
I need help on figuring why this is the answer. 4,5,9. i see how it all adds up.. but i am stuck on the over all reasoning
February 29, 2012

US HISTORY
clincher sentence on prohibition era. I want the reader to feel that they want to read more
February 28, 2012

US HISTORY
Could someone help me conclude an essay on prohibition. I am writing: even though there were laws and movements for prohibition, it actually didn't work. PLEASE HELPPP!!!
February 28, 2012

US HISTORY
could u tell how?? please
February 28, 2012

US HISTORY
is the temperance movement still in affect today?
February 28, 2012

US HISTORY
THANX !!!
February 28, 2012

US HISTORY
Anyone have a good informational website on temperance movement during the prohibition era.
February 28, 2012

ENGLISH 10
how the organized crimes expanded and the importance of it
February 28, 2012

ENGLISH 10
I need a thesis statement on the crimes of prohibition era
February 28, 2012

Numerical Methods
Derive the following formulas using Taylor series and then establish the error terms for each. f'(x) approx= (1/2*h)[4f(x+h)-3f(x)-f(x+2h)] f'(x) approx= (1/4*h)[f(x+2h)-f(x-2h)]
February 26, 2012

AP CHEMISTRY
U guys r no helpp!!!!!!!!!!!!! booooooooooooooooooooooooooooooooooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
February 25, 2012

AP CHEMISTRY
Write the formula for each of the following compounds, being sure to use brackets to indicate the coordination sphere. 1) bis(bipyridyl)cadmium(II) chloride 2)potassium tetrabromo(ortho-phenanthroline)- cobaltate(III)
February 25, 2012

law
• What is the role of police in society? What would happen if the role of the police were lessened as it applies to the theory and practice of community policing?
February 24, 2012

US HISTORY
What other laws were passed during the prohibition era. (EXCLUDING the 18Th amendment and Volstead act) THANX
February 22, 2012

US HISTORY
what laws were passed because of temperance movement. Or what did the government do because of the temperance movement (Prohibition era). Thanks!
February 22, 2012

US HISTORY
thank u
February 22, 2012

US HISTORY
Where did Prohibition Strongly take place and what were the major developments
February 22, 2012

US HISTORY
How Does prohibition era affect today life
February 22, 2012

french
thank you
February 21, 2012

french
Please can you check the following, thankyou. je vais acheter tu vas acheter il/elle acheter nous allons acheter vous allez acheter ils/elles vont acheter je acheterai tu acheteras il/elle achetera nous acheterons vous acheterez ils/elles acheteront i have to do the same for ...
February 21, 2012

statistics
I don't know
February 18, 2012

physics
The car has a mass of 1200kg Calculate the kinetic of the car when it travels at a speed of 12 m/s.
February 16, 2012

math
In the 17th century, there were more than 800,000 inhabitants of Paris. At the time, it was believed that no one had more than 200,000 hairs on their head. Assuming these numbers are correct and that everyone has at least 1 hair on their head, show that there had to be two ...
February 10, 2012

physics
our objects are situated along the y axis as follows: a 1.94 kg object is at +3.27 m, a 2.76 kg object is at +2.18 m, a 2.78 kg object is at the origin, and a 3.99 kg object is at -0.360 m. Where is the center of gravity of this system?
February 6, 2012

physics
You pick up a board of length 2.60 m and mass 13.00 kg. To do this, you exert a force upward with your left hand a distance LL=0.754 m from the left end of the board and you need to exert a force with your right hand a distance LR=0.264 m from the left end of the board. Assume...
February 6, 2012

Chem
How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
February 4, 2012

math
i need to find the answer for 964837 x 465
January 25, 2012

stats
A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 69?
January 23, 2012

statistics
A researcher wishes to estimate the mean height of women aged between 60 and 65 in the US. She desires a margin of error of 0.2 inches. Past studies suggest that a population standard deviation deviation of 3.2 inches is reasonable. Estimate the minimum sample size needed to ...
January 23, 2012

math
63
January 15, 2012

physics
CHICKEN NUGGETS = GOLDEN TAR
January 14, 2012

physics
What is the pressure at the bottom of a river (12 m deep) if the air pressure over the river is 98.23 kPa? The density of the river water is 988 kg/m3.
December 15, 2011

physics
What is the pressure at the bottom of a river (12 m deep) if the air pressure over the river is 98.23 kPa? The density of the river water is 988 kg/m3.
December 15, 2011

Spanishanother question
5. También yo recibí/he recibido muchos regalos de mi familia.
December 15, 2011

physics
One dimension. In Fig. 13-32, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and particle B has mass 4.00 mA. A third particle C, of mass 80.0 mA, is to be placed on the x axis and near particles A and B. In terms of distance d, at ...
December 6, 2011

physics
One dimension. In Fig. 13-32, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and particle B has mass 4.00 mA. A third particle C, of mass 80.0 mA, is to be placed on the x axis and near particles A and B. In terms of distance d, at ...
December 6, 2011

Physics
You have a 2.4 m high platform that is level on top. A spring launcher is located on the top so that it launches objects horizontally. You want to launch a 0.70 kg ball so that it hits at target on the ground 6.0 m away from the base. If the spring constant is 500 N/m, what ...
November 17, 2011

algebra
if the lengths of a triangle are y, y-1 and 7 what is the length of the longest side if the perimeter is 65
November 15, 2011

Physics
What is the angular momentum (in kg*m*m/s) of a 790 gram symmetrical rotating bar which is 2.85 m long and spinning at 245 rpm about the center of the bar?
November 14, 2011

organic chemistry
Could you use NaOH to separate acetylsalicylic acid (aspirin) and acetaminophen (Tylenol) by acid-base extraction?
November 13, 2011

spanish
I have to translate this to indirect style is this correct? Original:Pero cien años después, las personas negras todavía no son libres. Cien años después, la vida de las personas negras sigue todavía tristemente atenazada por los ...
November 7, 2011

Physics
A 72.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe", a track that is one-quarter of a circle with a radius of 4.65 m. What speed (in m/s) does he need at the bottom assuming that the local acceleration due to gravity is 9.80 m/s2?
November 2, 2011

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