# Questions Asked onNovember 1, 2010

1. ## chemistry

What volume of HCl gas is produced by the reaction of 2.4 liters of H2 gas with 1.5 liters of Cl2 gas? (Volumes are at the same T and P.) 1. 3.0 liters 2. 4.8 liters 3. 0.75 liters 4. 2.4 liters 5. 1.5 liters

2. ## Chemistry

If 4.0 L of a 4.8 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?

3. ## Physics

A 150-g block on the end of a spring with a spring constant of 35N/m is pulled aside 25 cm and released from rest. In the electrical analog the maximum charge on the capacitor is 0.25 C. The maximum current in the LC circuit is:

4. ## physics

A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet (uniform acceleration)

5. ## Chemistry

A chemist wants to make 4.5 L of a 0.310 M CaCl2 solution what mass of CaCl2 (in g) should the chemist use

6. ## PHYSICS

The observation deck of tall skyscraper 370 m above the street. Determine the time required for a penny to free fall from the deck to the street below.

7. ## physics

What displacement must be added to a 50cm displacement in the +x-direction to give a resultant displacement of 85cm at 25 degrees

8. ## Physics

An Alaskan rescue plane drops a package of emergency rations to a stranded party of explorers. The plane is traveling horizontally at 40.0 m/s at a height of 100 m above the ground. a) How far horizontally from the dropping point does the package strike

9. ## Physics

A spring has a spring stiffness constant, k, of 420 N/m . 1. How much must this spring be stretched to store 30 J of potential energy?

10. ## Chemistry- college

The standard enthalpies of formation of ions in aqueous solutions are obtained by arbitrarily assigning a value of zero to H ions;that is, delta H(f) [H+(aq)]=0 A.for this reaction: calculate delta H(f) for the Cl- ions. HCl(g) ==H2O==>H+(aq)+Cl-(aq) delta

11. ## Physics

A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before it reaches its peak.

12. ## physics

The average human has a density of 940 kg/m3 after inhaling and 1028 kg/m3 after exhaling. (a) Without making any swimming movements, what percentage of the human body would be above the surface in the Dead Sea (a lake with a water density of about 1230

13. ## AP Biology

I have two questions: 1. Why are action potentials usually conducted in only one direction along an axon? A. The axon hillock has a higher membrane potential than the terminals of the axon. B. The brief refractory period prevents reopening of voltage-gated

14. ## calculus

With x people on board, a South African airline makes a profit of (1104 − 3 x) rands per person for a specific flight. A. How many people would the airline prefer to have on board? Answer: x= B. What is the maximum number of passengers that can board

15. ## chemistry

Two gases are contained in gas bulbs connected by a valve. Gas A is present in a 56 L bulb at a pressure of 213 torr. Gas B exerts a pressure of 683 torr in a 74 L bulb. What is the partial pressure of gas B after they equilibrate once the valve has been

16. ## Physics

As you approach the I-90 exit in your uncle's little red sports car convertible, you happen to notice a cat crossing the road. Not that you have any particular love of cats (especially this one, whose snooty disposition seems to beckon for a game of

17. ## physics

What would be the weight of 22.0kg dog at the equator on Saturn's surface? (Saturn's mass equals 5.69 X 10^26kg, Saturn's equatorial radius equals 6.03 X 10^7m, Earths mass equals 5.97 X 10^24)

18. ## physics

A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) What is the magnitude of the gravitational acceleration of the satellite?

68. ## ALgebra

the difference of two numbers is 37. the larger is one more than four times the smaller. what are the numbers?

69. ## Chemistry

Magnesium forms both an oxide and a nitride when burned in air. Discuss the formation of magnesium oxide and magnesium nitride when magnesium atoms react with oxygen and nitrogen atoms.

70. ## algebra

two investments were made totaling $15,000. for a certain year these investments yielded$1432 in simple interest. part of the $15,000 was invested at 9% and part at 10%. find the amount invested at each rate. a total of$1150 was invested, part of it at

71. ## Richter scale question

An earthquake registers 6.1 on the richter scale. What is the rating on an earthquake twice as powerful? I know: M=I/Io Then what do you do?

72. ## Physics

A ball is launched horizontally from the top of a 320 m high building. For the first 7 seconds of flight, make a table of the vertical position from the ground versus time similar to the one below using Excel Time (sec) Vertical Position (m) 0 320 1 2

73. ## Algebra II

I have a question- The range of y = 1/(x-5) is All real Numbers True or False I think it is false because it should be all real numbers except y shouldn't equal 0. Is that correct or don't I understand it-Please explain if I'm wrong. Thanks

74. ## chem.

CH3COOH + C5H12O -> C7H14O2 + H2O If the yield for the reaction is 45%, how many grams of the product are formed when 3.58 g of acetic acid are reacted with 4.75 grams of isopentyl alcohol? Millimoles of acetic acid= 59.6667 Millimoles of isopentyl

75. ## english

Which of the following topics relate directly to a work's authenticity? 1)believability of characters 2)the appeal of a certain guitar riff 3)sincerity expressed in a love song 4)the likely appeal to all teenagers 5)the way the setting matches the mood of

76. ## physics

A car is traveling at 45.0 mi/h on a horizontal highway. (a) If the coefficient of static friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? ____ m (b) What is the stopping distance when the

77. ## Chemistry

For Carbon dioxide, for a volume of 500 mL and temperature of 100 degrees celcius, calculate the pressures using the ideal gas law and the van der Waals equation. Explain any dicrepancies in the calculated values. Ideal Gas Equation: Van Der Waals Equation

78. ## Math: Calculus

A fence is to be built to enclose a rectangular area of 230 square feet. The fence along three sides is to be made of material that costs 5 dollars per foot, and the material for the fourth side costs 15 dollars per foot. Find the dimensions of the

79. ## Physics 11

How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!

80. ## chemistry

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) →B(g). The following data are obtained for [ A ] as the reaction proceeds: Time (s) 1 10 20 30 40 Moles of A 0.124 0.110 0.088 0.073 0.054 how do i solve

Suppose that the graph of force vs. time for a very unusual spring has only straight lines. The cart hits the spring at t = 3.00 s, so force F = 0 up to that point. Then, after t = 3.00 s, the force increases linearly until it reaches a maximum at Fmax =

82. ## chem

complete this reaction 2 NaNO3 + ht →

83. ## physics

Suppose I have a circular metal disk spinning at a constant angular velocity. Now imagine near to, but not in contact with the first disk, I have an identical metal disk spinning at the same angular velocity but in the opposite direction (ie. W1 = -w2) and

84. ## PHYSICS ---HELP!

Consider a hoola-hoop of radius R and it is spinning about its symmetry axis at a constant angular velocity. Now, I double its mass and halve its angular velocity. What is the new angular momentum in terms of the initial angular momentum?

85. ## lee senior

what is -2x+y=-4

86. ## chem 30

how do you find solubility of Pb(NO3)2, PbCl2, PbCrO4, and PbS

87. ## equation of exp function

What equation has the following features: It has the x-axis as an asymptote and it passes through (0, -1), (-1,-3) and (-2,-9)?

88. ## statistics

Does the 99 percent confidence interval include the value suggested by the NCAA? Interpret this result.

suppose a cart of mass m = 969 g is initial moving at speed v0 = 5.17 m/s. It strikes a spring attached to a fixed wall, comes to a stop, and bounces back at speed vf = 4.48 m/s. Assume the track is frictionless. a) Find the magnitude of the impulse

90. ## chemistry

Can someone just get me started on this im not sure of how to go about solving this. The heat of vaporization of carbon disulfide, CS2, at 25° C is 27.2 kJ/mol. 1.00 mol of carbon disulfide vapor condenses to liquid at 25° C. The entropy of this vapor at

how many boxes can you find that will hold two times as many cubes as a 2 by 3 by4 box.record each of the dimensions

92. ## PHYSICS

NEED HELP ON THE ANSWER OF THIS PROBLEM THE EFFICIENCY OF THE PULLEY DECREASES WITH A COEFFICIENT OF FRICTION OF 2.0 THE EFFICIENCY OF THE PULLEY IS 60% WHAT WOULD YOU EXPECT THE EFFICIENCY TO BE IF THE COEFFICIENT OF FRICTION INCREASED TO 0.3

93. ## MATH

instrctions:graph each linear equation .tell whether it represents a function. 1.) x+y=4 HELP QUICK PLEEZE!!!!!!!!!!!!!!!!!!!!!

94. ## fraction

complete the following by using the cancellation technique 3/4 x 2/4 x 6/9

95. ## Physics

A father (mF = 83 kg) and his daughter (mD= 43 kg) stand on a flat frozen lake of negligible friction. They hold a 13 m long rope stretched between them. The father and daughter then pull the rope to bring them together. If the father is initially standing

96. ## arithmetic

is 1/8 in the simpelest form

97. ## Maths

What is the answer to the following using sicentific calculator 64-1/6

why is the gap between the rich and the poor growing according to Robert Reich in "What happned to the American Social Compact"?

99. ## help me physics

suppose the cart has mass m = 203 g, and it strikes the clay at speed vo = 5.24 m/s and comes to a dead stop. Assume the track is frictionless, and the clay is crushed inward by 1.83 cm. a)Find the magnitude of the impulse exerted by the clay on the cart.

100. ## Chemistry

1. What is the pH of the solution created by combining 0.50 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? 2. What are the pH values if you take into account that the 8.00 mL of 0.10 M Acid was first

101. ## Finance

Simtek currently pays a $2.50 dividend (D0) per share. Next year’s dividend is expected to be$3 per share. Aft er next year, dividends are expected to increase at a 9 percent annual rate for three years and a 6 percent annual rate thereaft er. a. What

102. ## Physics

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 23.4 N, the weight of each magnet is 2.67 N, and the magnetic force on

103. ## science need help!

i am doing questions and i just want to say i need help the question says ____________ affects how much moisture is in the air i don't get it

104. ## English

1. I am going to do volunteer work at a cultural center. 2. I am going to do volunteer work at a community center. 3. I am going to do volunteer work at a community cultural center. (Are they all the same? Which one do we have to use?) 4. I am going to do

105. ## enlish

hi i would like to now how to writte more pharagraphs that is what i need help thanks,

106. ## college

A spaceship lands on the planet whose radius is 5 times that of planet earth and whose mass is 25 times that of planet earth. Find the apparent weight of the astronaut on the second planet if the astronaut weighs 150lbs on planet earth

107. ## eCONOMICS

Explain how an economist could use the slope of the yield curve to analyze the probability that a recession will occur and why the spread may matter.

108. ## AP Chem

Pretend you are a nuclear scientist and try to answer this bonus question. Uranium -235 (235U) is used as a fuel in nuclear power plants. However, natural uranium contains mostly U -238 (238U) and very little uranium -235. Therefore, it is necessary that

109. ## English

How does the Scarlet letter A affect Hester Prynne's personality and her thinking concerning the position of women in society?

110. ## physics

A bicycle accelerates from 0.0 m/s to 18 m/s in 4.4 s. What distance does it travel?

111. ## Stats

If a confidence interval for the mean is 24.8 < ì < 29.6. What is the margin of error?

112. ## Physics

A 66 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 14 m, and falls a total of 34m. 1. Calculate the spring stiffness constant of the bungee cord, assuming Hooke's law applies. 2. Calculate the maximum

113. ## Physics

Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration?

114. ## Pre Calc.

Use limits to describe the behavior of the rational function near the indicated asymptote f(x)=3/x-4

115. ## chemistry

Balance the following redox reactions assuming a basic solution. Show all the steps. a. MnO2(s) -> MnO4^-2 + H2 (g) b. H2O2 (aq) + Cl2O7 (g) -> ClO2- (aq) + O2 (g) How can you balance these if for example in part a., there is no H on the left side... can I

116. ## math 116

a. Write an equation in the “y = mx + b” format for the canal that runs through the Toaster Company property. Solve for “m” and “b” in the “y = mx + b” formula. The canal crosses the x-axis at -16 and crosses the y-axis at 3. See the chart

You have recently been hired as a new manager hired into a failing division in a company. The product line is outdated and losing market share, inter-departmental communication is adversarial, and competition for corporate funding is fierce. How are you, a

118. ## Science

how do you find the degrees for a pie graph (ex) 1st 19 2nd 15 3rd 20 4th 15 5th 22 6th 15 ??? plz help!

119. ## Physics

A 10 kg ball moving due west at 2m/sec collided with a 4kg ball that is moving due east at 3m/sec. you determine that immediately after the collision the 10 kg ball is moving due west at .57 m/sec. a) this probably is a totally elastic collision b) this

120. ## physics

A long, straight metal rod has a radius of 4.50 cm and a charge per unit length of 30.0 nC/m. Find the electric field at the following distances from the axis of the rod, where distances are measured perpendicular to the rod. a)3.00 cm b)13.5 cm c)120 cm

276. ## Physics

If it requires 7.0 of work to stretch a particular spring by 2.1 from its equilibrium length, how much more work will be required to stretch it an additional 3.7?

277. ## Physcis -wavelets and wavefronts

Describe how the wavelets that form in the wavefront apparently vanish behind it?

278. ## Physics - Sound Energy propagation

Sound, a form of energy can be modeled by using two distinctly different approaches. a) Describe the propagation of sound energy through air by discussing the motion of individual particles. Include possible mathematical equations that might apply. Ans:

279. ## Math

Fireworks are fired at an angle of 82degrees with the horizontal. They are expected to explode about 100 m in the air, 4.8 secs after they are fired. What is the initial velocity of a shell fired from ground level. I think I have to find the vertical and

280. ## chemistry

What are ways of disposing concentrated sulpheric acid?

281. ## ethics

How did slavery influence the evolution of both Back and White America today?

282. ## algebra

find all real zeros and their multiplicity of the polynomial function f(x)=5(x-4)squared(x+2

283. ## hum 105

a scholarly article that discusses some aspect of the Female Divine in contemporary culture. (This might range anywhere from discussions on goddesses in advertising found in an article on marketing to discussions of feminine principles in contemporary

284. ## psychology

An example of ______________ would be if you argue that most behaviors are a product of your environment and your friend argues that behaviors are a result of heredity

285. ## Physics HELP!!!

In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.0529·10−9m when it is in the n=1 state. What is its electric potential energy?

286. ## Numerical method - numerical integration

Evaluate the following integration: I(f) = integral sign from 0 to 20 of e^(-x) dx 1. Analytically 2. Rectangle method with h= 10,5,4,2,1. 3. Mid-point method with h= 10,5,4,2,1. 4. Trapezoidal method with h= 10,5,4,2,1. 5. Simpson's method with h=

287. ## geometry

The radius of a circle is 34 meters long,and a chord of the circle is 60 meters long.how far is the chord from the center of the circle?

288. ## math

Have 2 questions: 1. Factor Trinomial competely x^2 + 8x + 53 (reads as x squared plus 8x plus 53) I am thinking it is prime. 2. Solve 4x^2 + 23x - 30=0 (reads 4x squared plus 23x minus 30 equals zero

289. ## ALgebra

the sum of two numbers is 87 & their difference is 35. find the numbers.

290. ## Statistics

What type of data must you collect to conduct a t-test? Why?

291. ## algebra

write the partial fraction decomposition of the rational expression ax over x squared -x-2 or ax ____________ xsquared-x-2

292. ## chemistry

33) A first-order reaction has a rate constant of 0.33 min-1. It takes __________ min for the reactant concentration to decrease from 0.13 M to 0.088 M. A) 1.4 B) 0.13 C) 1.2 D) 0.85 E) 0.51 how can i set this up?

293. ## Economics

Indicate the effect that each of the following conditions will have on a company's average variable cost (AVC) and average total cost (ATC) curves: a. The movement of a company's administrative offices from New York City to New Jersey where rent costs are

294. ## chemistry

Can someone please explain this question to me, i am not sure if i am right but i think the answer is 2? How many of the following elements have 2 unpaired electrons in the ground state? how many of the following elements have 2 unpaired electrons in the

295. ## algebra

state the domain of the function. identify all intercepts and find vertical and horizontal asymtodes. f(x)=x-2 over x+1 or x-2 f(x)= ___ x+1

296. ## Physics

A 2.03 kg mass is observed to accelerate at 8.82 m/s2 in a direction 28.8° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object?

297. ## Chemistry

For the reaction shown, compute the theoretical yield of the product (in grams) Ti(s)+2Fe(g) = TiF2(s) 6.0 g Ti, 6.0g F2

298. ## University of phoenix mat116

use multiplying by 1 to find expression equivalent to 16/17 with denominator of 102d

299. ## physics

A freight train has a mass of 5 x 107 kg. If the locomotive can exert a constant pull of 12 x 105 N, how long would it take to increase the speed of the train from rest to 85 km/h

300. ## Physics

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 23.4 N, the weight of each magnet is 2.67 N, and the magnetic force on

301. ## chemistry

the dissociation of molecular iodine into iodine atoms is represented as: I2 =2I Suppose that .0256 mole of I2 was placed in a 2.30 L flask at 1000K. what is the intial concentration of the I2 before any reaction occurs?

302. ## physicss

What average force is required to stop an 1100 kg car in 9.1 s if it is traveling at 83 km/h?

303. ## help quick pleeze

WITHOUT GRAPHING tell whether each point is on the graph of y=-4x-1. (1/2,-1)

Why are so many niches available on recently devastated islands such as Galapago's island?

305. ## English

1. In Korean culture, the half-moon is a symbol of growth. 2. In Korean culture, the half moon is a symbol of growth. (Are both OK? What about the use of a hyphen between 'half' and 'moon'? And what is the use of 'the' before 'half moon'?))

306. ## math

for every left-handed person there are about 4 right-handed persons. If there are 30 studentsa in a class write and solve a proportion to predict the number of students who are right-handed.

307. ## Chemistry

At equilibrium, [S(CH2CH2Cl)2] = 350 M, [SCl2]=.325M, and [C2H4] =.273 M for the reaction below. SCl2 + 2C2H4 = S(CH2CH2Cl)2 What is the Kc?

308. ## English

1. Wine is made from grapes. 2. Grapes are made into wine. (Both are the same, right/) 3. The bridge is made of stone. 4. The bridge is made out of stone. 5. The bridge is made from stone. 6. The bridge is made with stone. (Which ones are grammatical from

309. ## MATH

6X100

1. What are the primary roles of media delivering news to the public?

311. ## government

Candidate-centered politics is least characterized by a heavy reliance on

312. ## SCI230 UOP

Can someone give me an idea on how my outline should look? I have a checkpoint due tomorrow titled: Article Critique Outline. I chose the topic: Thousands of Undiscovered Plant Species Face Extinction. Guidelines: - Introduction to paper and chosen topic -

313. ## Chemistry

Write the equilibrium constant expression for the reaction: 2NO +2H2 =N2+2H2O Kc=?

314. ## English

1. Rice cake soup is made from sliced long rice cakes. 2. Rice cake soup is made of sliced long rice cakes. 3. Rice cake soup is made with sliced long rice cakes. (Which one is grammatical? Please notice the use of prepositions.)

315. ## Physics

Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration?

316. ## english

This teen romance doesn't have a single authentic moment, from its canned tragedy setup . . . to its power-ballad finale . . ." wich one would it be? authenticity? universality? aesthetics?

317. ## chem

What would be the reaction between Mn2+ and NH3? is it Mn(NH3)? and would this solution react with HNO3, considering it would already have NO3 in it?

371. ## college algebra HELP

The population of a city was 166 thousand at the begining of 2004. The exponential growth rate was 1.5% per year. Use the formula P(t)=P[o]e^(kt) where P[o] is the population in 2004 and k is the exponential growth rate. a) predict the population in 2016,

372. ## science

what is sparting?

373. ## Math

Latoya has 3/4 of a bag of popcorn. If she eats half of the popcorn at a movie, ho much does she have left?

374. ## chemistry

What is the purpose statement for the lab comparation titrations?

375. ## physics

What is the approximate mass of air in a living room 6.0 m times 3.9 m times 2.7 m?

I don't get how to do this. I'm so lost please help me. Determine the equation of the parabola with roots 2+√3 and 2-√3, and is passing through the point (2,5) this is what i did but its the wrong answer: y= a[x + (2+√3)] [x+(2-√3)] 5= a[2 +

377. ## statistics

if the mean of a set of data is 23.00 and 10.00 has a z-score of -1.30, then the standard deviation must be?

378. ## Physics

A swimming pool 16.0 m by 9.1 m and uniform depth is 2.0 m. What will be the pressure against the side of the pool near the bottom?

379. ## Algebra

To convert from centimeters to inches, multiply the number of centimeters by 2.5. True or False?

380. ## english

compare and contrasrt natty bumppo in the prarie and john in the Hospital SKetches.

381. ## Chemistry

Explain why the calculated value for the (1) enthalpy of combustion for propane using bond energies (bond breaking and bond formation)might not be in close agreement to the values calculated using (2) Hess Law and the values calculated using the (3)

382. ## HIT 105 research paper

I am doing a paper on HIPAA and I need to cite my work. Have the paper finished but I am having problems citing my work. Could someone help me please?

383. ## social studies

Into what ocean do most of South America's rivers flow?

384. ## Algebra

factor completely 3y^2-27

385. ## curriculum content

which is the oldest art? A.Dram-theater B. photography C. Dance D. music

Can somebody help me solve this problem? Simplify and evaluate the expression for y = 0, z = -1.5. -0.8z +0.005z(-0.001y - 3.1 + (-1.5z + 3))

387. ## Networking

I was wondering if when I posted my paper, everyone would help me proof it and help me find references, I've done most of it by memory, and what I would do situations, but I need references. If you would that'd be awesome

388. ## English

Thank you very much for your help. I still ha a few doubts on a few sentences.I hope you can have a look at them, too 1)Tess has heard about Mickey by her friend Storm. Mickey is broke. He’s got a job as a dish washer. He works every evening after school

389. ## Comm

Write five sentences about the role of education in successful financial planning in the spaces on the following page. Correctly use a different verb tense in each sentence.

390. ## geometry

how many lines of symitery does a delts shape have

391. ## ap calc bc

hello! what is the derivative e^4 ???? thank you!

392. ## economics

how would a citizen whoose income is in the top one percent talk about scarcity and trade offs?

393. ## Global science

Exponential growth is stopped when______equals. there are no choices and I don't hve an answer. I am learning about Growth and population.My science book is called Global science Earth/ environmental systems science by Kendall Hunt publishing company. It

do you have to use unit signs when creating a number model? like \$, cans, marbles ect...

how do seed banks preserve seeds for future generations?