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September 2, 2014

Posts by John


Total # Posts: 6,219

AP PHYSICS HELP
Thanx!!!!
December 10, 2012

AP PHYSICS HELP
A 1.47 x 10^6 kg steel hull has a base that is 2.5 x 10^3 m^2 in area. If it is placed in sea water (density= 1025 kg/m^3), how deep does the hull sink?
December 10, 2012

science
Consider a single electron in a 1dimensional box with size a, What is the expected position <x> of the electron at the second excited state? What is the expected value of linear momentum at the ground state ?
December 8, 2012

Life Science
Name one plant and one animal that previously lived in Antarctica, but are now extinct throughout the entire world.
December 7, 2012

Reading
Can anyone help me with 12?
December 7, 2012

Math
When (5x^6+10x^5+2x^4+19x^3+2x^2+1)^10000 is multiplied out, what is the coefficient of x^4?
December 6, 2012

math
idk
December 5, 2012

math
anser it
December 3, 2012

math
What is the degree of the polynomial -2?
December 3, 2012

college physics
191.1
December 3, 2012

Physics
A skateboarder enters a ramp at 5 m/s, skates down it and exits at 14 m/s. What was the Height of the ramp? A. 8.7 m B. 85.5 m C. -1.2 m D. 3m E. 1.2 m Pls show work !
December 3, 2012

Physics
The work required to bend a steel beam with a spring constant of 10^6 n/m is 5 j. If it is treated like a perfect spring, what is the displacement of the beam? A. 3.2 mm b. .03 m C. 2.5m D. 0.026 m e. 0 Pls show work thank u!
December 3, 2012

Physics
A block with a mass of 2.5 kg on a frictionless track collides and sticks to a stationary block with a mass of 1.75 kg and the two more together at a velocity of 3.5 m/s. What was the velocity of the first block? A. 2.5 m/s B. 7.5 m/s C. 6.0 m/s D. 0.6 m/s E. 0 m/s pls show ...
December 3, 2012

Chemistry
What volume (in mL) of 0.45 M Na2SO4 solution is needed to precipitate all the barium, as BaSO4(s), from 14.5 mL of 0.15 M Ba(NO3)2 solution? Ba(NO3)2(aq) + Na2SO4(aq)= BaSO4(s) + 2 NaNO3(aq)
December 2, 2012

Chemistry
Never mind. I got it
December 2, 2012

Chemistry
How many grams of CuCl2 are required to prepare 1270. g of a 1.75% (by mass) CuCl2 solution?
December 2, 2012

Chemistry
What's the linear density of body center cubic (0,1,1)of Molybdenum
November 29, 2012

chemistry
How would you prepare the following solution? a)2% NaCL(w/v) b).35M glucose C)0.12M CaCl2 For b I got glucose 0.35=wt/180=63gm/L, but not sure if I'm doing it right.
November 29, 2012

Physics 1
A catapult 100 m long launches a 3.0 x 10^4 kg jet from the deck of a carrier. Starting at rest, the plane takes off with a speed of 80 m/s. Find: a)The acceleration, b) the average force, c) the work done, d) time to accelerate , e) the power developed.
November 28, 2012

Pre-calculus
what does sqrt mean?
November 27, 2012

Pre-calculus
You are given a 12"x18" piece of construction paper. You are to cut a square out of each corner in order to create a 3-dimensional open-top box. What size squares would you need to cut in order to maximize the volume of the box?
November 27, 2012

physics
tyvm :)
November 27, 2012

physics
Air consists of molecules of several types, with an average molar mass of 28.95 g. An adult who inhales 0.6 L of air at sea level takes in about how many molecules? (The density of air is 1.229 kg/m^3, and the molar mass of air is 28.95 g/mol.)
November 27, 2012

math
4x+3=15
November 26, 2012

math
write a situation with a algebraic exprassion that can reprsened x+3
November 26, 2012

Science
A car speeds over the top of a hill. If the radius of curvature of the hill at the top is 14.27 m, how fast can the car be traveling and maintain constant contact with the ground?
November 26, 2012

MATH PLEESE HELP ITS URGENT
A is 11 by 11 B is 11 by 13 c is 13 by 13 total area is 433 m2 area of B is 143 m2 total perimeter is 96 m
November 26, 2012

Chemistry
How many moles of CO2 would be expected to be produced from 0.00639 moles of sodium carbonate?
November 26, 2012

physics
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 195-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal acceleration of ...
November 25, 2012

question about making reference
i'm completely lost. the only thing i found helpful is this. "For multiple articles by the same author, or authors listed in the same order, list the entries in chronological order, from earliest to most recent." still i dont have any idea.
November 25, 2012

question about making reference
forgot to add. i'm using APA style
November 25, 2012

question about making reference
what is the right way to cite this? all the info comes from 1 book but different pages. Martin Kantor (2003). Distancing: Avoidant Personality disorder. Road West, Westport: Praeger publishers. Pp. 13-14. Martin Kantor (2003). Distancing: Avoidant Personality disorder. Road ...
November 25, 2012

chemistry
75g of FeCL3 are dissolved in 700 mL of solution, what is the concentration of Fe3+ ions? what is the concentration of Cl- ions?
November 25, 2012

physics
A duck has a mass of 2.70 kg. As the duck paddles, a force of 0.130 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.210 N in a direction of 52.0 ° south of east. When these forces begin to act, the velocity of the duck is 0....
November 25, 2012

physics
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.46 x 105 m/s to a final velocity of 2.25 x 106 m/s while traveling a distance of 0.0803 m. The ...
November 25, 2012

physics
An airplane has a mass of 3.41 × 104 kg and takes off under the influence of a constant net force of 2.57 × 104 N. What is the net force that acts on the plane's 78.8-kg pilot?
November 25, 2012

English and grammar
i need someone to check my work but i cant just copy it and paste it here. i need to send it via e-mail. please give me your email add and ill send it to you. thanks
November 25, 2012

alebra
9,040,000,000
November 24, 2012

maths
differentiate x^2ex^2 W.R TO X
November 24, 2012

English and Grammar
I choose to do research on Avoidant personality disorder or APD because a friend of is suffering from APD and I’m having trouble how to approach him. My friend’s name is Jim. He told me that he started to feel the symptoms when he was in his teen age years. Jim told ...
November 23, 2012

English and Grammar
first draft of my report and i need help in improving this. i didnt made up all the information here all comes from a book. Dissociative identity disorder is defined in the DSM-IV-TR as the presence of two or more personality identities that repeatedly take control of one’...
November 23, 2012

Algebra II
so x would = 3?
November 20, 2012

Algebra II
Find the x-value at which y=2x+5/x-3 is undefined.
November 20, 2012

Algebra II - Word Problem
A convenience store clerk can wait on 6 customers per minute. If customers arrive at an average rate of x people per minute, the time T spent in line is: T=1/6-x, where 0<x<6 Find the waiting time if an average of 4.75 people arrive each minute.
November 20, 2012

math
those are 0 in the question not θ
November 20, 2012

math
P: Solve each to four decimal places (x real and 0 in degrees) 5 cos x - 2 = 0, 0<orequalto x < 2pi
November 20, 2012

Chemistry114
The air in a cylinder with a piston has a volume 220 ml and pressure of 650 mm hg. If the pressure inside the cylinder increase to 1.2 atm. what is the final volume of the cylinder? Complete the following data table.
November 19, 2012

Statistics
Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
November 18, 2012

Statistics
If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35
November 18, 2012

Chem
. Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. A. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3? Show your solution. B. Discuss at least three potentially ...
November 17, 2012

Chemistry
Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
November 17, 2012

chemistry
If 45 colonies grew on the filter and 1 mL of a 10-5 dilution of the sample was filtered, how many coliform bacteria were in 100 mL of the original sample?
November 16, 2012

math
Paul's Pizzeria sells 45 cheese pizzas and 20 pepperoni pizzas each week. What is the ratio of cheese pizzas to pepperoni pizzas sold each week by Paul's Pizzeria?
November 16, 2012

Statistics
Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
November 16, 2012

Statistics
If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35
November 16, 2012

math
Sin(2x)=2sin(x)cos(x) find the exact value in radians with 2sin^2(x)+sin^2(x)=0, i really do not get this question or even how to do this ive been trying to figure it out but cant
November 16, 2012

math
Sin(2x)=2sin(x)cos(x) find the exact value in radians with 2sin^2(x)+sin^2(x)=0, i really do not get this question or even how to do this ive been trying to figure it out but cant
November 16, 2012

physics
When archer pulls an arrow back in his bow.He is storing potential energy in his bow What avg force must the archer exert if he pulls the string back a distance of 30 cm?
November 15, 2012

english(quotes)
The identity you stand up for can enslave you and close you to the rest of the world. -Murathan Mungan What does this quote mean?
November 15, 2012

Algebra II - Word Problem
If a car is traveling downhill at 45 miles per hour on dry pavement, then the braking distance B is B = 45/(0.4+m), where m<0 is the slope of the road. Find the slope of the road if the braking distance is 125 feet.
November 15, 2012

Algebra II - Word Problem
I'm guessing it's 48 seconds, but not sure... Thanks!
November 15, 2012

Algebra II - Word Problem
A convenience store clerk can wait on 6 customers per minute. If customers arrive at an average rate of x people per minute, the time T spent in line is T = 1/(6-x), where 0<x<6 Find the waiting time if an average of 4.75 people arrive each minute.
November 15, 2012

physics
NEVERMIND I GOT IT
November 15, 2012

physics
A body of mass m is attracted to a 11 kg mass 31.2cm away with a force magnitude of 6.42 x 10^-8 Find m? I am having trouble with the algebra getting m by it self just show me the steps if you can
November 15, 2012

Chemistry
37.5 x .152 / 25
November 15, 2012

Algebra II
A runner completes a 16 mile trip, running 8 miles uphill and 8 miles downhill in a total of 4 hours, if his uphill speed is 3 mph slower than his downhill speed, find his downhill speed.
November 15, 2012

Statistics
One event A is _________________ of another event B if the probabilty of event A has occurred given event B is the same as the probability that A will occur with no knowledge of B. disjoint mutually exclusive dependent independent
November 15, 2012

Statistics
If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35
November 15, 2012

math
Yes Kate is right. ur sexy too jk
November 14, 2012

Science
Chl has an absorbance peak at 435nm (Soret band) and a peak at 665nm (Qytransition). Calculate the energy gap (in Joules) between the ground and excited states of these two transitions.
November 14, 2012

Physics
An advertising firm has contacted your engineering firm to create a new advertisement for a local ice-cream stand. The owner of this stand wants to add rotating solid cones (painted to look like ice-cream cones, of course) to catch the eye of travelers. Each cone will rotate ...
November 13, 2012

Finance
United Technology Corporation (UTC) has $40 million of convertible bonds outstanding (40,000 bonds at $1,000 par value) with a coupon rate of 11 percent. Interest rates are currently 8 percent for bond of equal risk. The bonds have 15 years left to maturity. The bonds may be ...
November 13, 2012

physics
A 43.3 kg girl is standing on a 125 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless sup- porting surface. The girl begins to walk along the plank at a constant speed of 1.87 m/s to the right relative to the plank. What ...
November 12, 2012

physics
A 43.3 kg girl is standing on a 125 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless sup- porting surface. The girl begins to walk along the plank at a constant speed of 1.87 m/s to the right relative to the plank. What ...
November 12, 2012

physics
A(n) 775 N man stands in the middle of a frozen pond of radius 11.2 m. He is un- able to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.3 kg physics textbook horizontally toward the north shore, ...
November 12, 2012

Statistics
Which of the following statements about the correlation coefficient r are true? I. It is not affected by changes in the measurement units of the variables. II. It is not affected by which variable is called x and which is called y. III. It is not affected by extreme values. I ...
November 12, 2012

Statistics
Suppose a study finds that the correlation coefficient relating family income and SAT scores is r = +0.98. Which of the following are proper conclusions? I. Poverty causes low SAT scores II. Wealth causes high SAT scores III. There is a very strong association between family ...
November 12, 2012

math
Q) (Speed) Ahmed drives from Abu Dhabi to Dubai. The journey takes him 1 hour 30min and the distance covered is 130km. What is the average speed at which he was travelling (rounded to the nearest 1km/hr)?
November 12, 2012

science
What is meant by depassivation of reinforcement? State the two main chemical attacks that lead to depassivation
November 11, 2012

Physics
A file cabinet weighing 1500 N is at rest on the floor. The coefficient of static friction between the floor and the cabinet is 0.5. What is the minimum force required to make the file cabinet move horizontally
November 10, 2012

science
Abiotic factors
November 10, 2012

math
how do you go about doing place value puzzles .can you show me an example please(hundredths place,thousandths place,ones place and tenths place
November 9, 2012

physis
45
November 9, 2012

Math
113.50 ? 114.50 ? 115.00
November 8, 2012

physics
A shopper in a supermarket pushes a loaded 32 kg cart with a horizontal force of 15 N. The acceleration of gravity is 9.81 m/s2 . a) Disregarding friction, how far will the cart move in 3.3 s, starting from rest? Answer in units of m
November 8, 2012

Organic chemistry
Help me find my percent yield for my witting reaction experiment.... The weight of my final product was: 0.13 I put 0.40 g of benzyltriphenylphosphonium chloride, 0.23 g of 9-anthraldehyde and 1.0ml DMF and 0.5ml of aqueous sodium hydroxide into the flask at the start of the ...
November 8, 2012

Chemistry
Help me find my percent yield for my witting reaction experiment.... The weight of my final product was: 0.13 I put 0.40 g of benzyltriphenylphosphonium chloride, 0.23 g of 9-anthraldehyde and 1.0ml DMF and 0.5ml of aqueous sodium hydroxide into the flask at the start of the ...
November 8, 2012

Organic Chemistry
chlorobutane, chloride ion is weaker leaving group
November 8, 2012

Statistics
Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the correlation is +0.57 It ...
November 8, 2012

Statistics
New York and Pennsylvania have progressive toll roads. Upon entering the toll road the driver receives a ticket marking the location and time of entrance. Upon exiting the mileage is computed and the driver pays the toll. Which of the following would you expect to be true ...
November 8, 2012

science
Assume an average human cell has a cell cycle of 20 hours. Calculate how many cells there would be after 80 hours.
November 7, 2012

social studies
what resources did early native american used
November 7, 2012

Physics
A freight train has a mass of 1.7 × 10^7 kg. If the locomotive can exert a constant pull of 5.2 × 10^5 N, how long would it take to increase the speed of the train from rest to 74.6 km/h? Disregard friction. Answer in units of s
November 7, 2012

fractions from least to greatest
can you list 3/4, 3/5, and 5/6 from least to greatest
November 7, 2012

History,Art
Yes I have, I need to provide information about her and her life but I need to know her name.
November 7, 2012

History,Art
I need to find a picture of 2 paintings: Crimson Rambler by Philip Hale and Automat by Edward Hopper. I also need some assistance with this assignment involving these two paintings. I have to outline a story I would write about the woman in the paintings(I'm supposed to ...
November 7, 2012

Pre Calc
How to prove tan4x = 1-8 sin squared of cos squared of x
November 6, 2012

chemistry
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0230 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca2 (aq) can be separated from the Ag (aq) by selective precipitation?
November 5, 2012

grammar
SSS means a compound subject and PPP means a compound predicate if i am right .(1) Blue flages and green rushes grew along the river.I underline blue flags and green rushes once,and grew along bthe river. twice.(2)I underline the flat creek bed once and was made of warm, soft ...
November 5, 2012

grammar
can you underline the complete subject and the complete predicate of these sentences.show by stating (SSS)and(PPP)also.(1)Blue flags and green rushes grew along the river.(2)The flat creek bed was made of warm ,soft mud. (3)Laura hopped and splashed in the cool creek.(4)The ...
November 5, 2012

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