# Posts by Bill

Total # Posts: 872

chemistry
The state of texas covers approxmiately 268,58 squared mi. During a hail storm the entire state is covered in 1billion meters of hail.(average radius of 1.4292cm)assume the hail falls so that the gaps of air are limited to 26% of the volume. As the state begins to warm, the ...

Physics
Awesome, thanks Elena!

Physics
Calculate the force on an electron (qe = -1.6 x 10^-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10^-6 m from a proton c.) in Earth's gravitational field at the surface of Earth

Physics
oops accidentally posted twice... sorry.

Physics
Calculate the force on an electron (qe = -1.6 x 10-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10-6 m from a proton c.) in Earth's gravitational field at the surface of Earth

math
An object travelling in a straight line away from a motion sensor at a constant rate moves from 4 m away to 16 m away between t = 1 s and t = 6 s. Describe the segment corresponding to this walk on the speed versus time graph.

math
(2,-7) is a point on the graph of y=f(x) . Find the corresponding point on the graph of y= 3f(5(x-1)+1 .

chemistry
A sample of a saturated hydrocarbon is placed in a 1.0L vessel at 107oC. The pressure of the sample at these conditions is .40 atm. A stoichiometrically equivalent amount of oxygen is added to the vessel and the mixture is combusted. Following combustion, the pressure in the ...

chemistry
it isn't showing your response in the earlier post!

chemistry
A 20.0 gram sample is a mixture of sodium phosphate ,sodium mono-hydrogen phosphate,sodium dihydrogen phosphate and sodium chloride. The sample is dissolved in 100.0 ml of deionized water and titrated with 1.5 M hydrochloric acid. The initial pH of the solution is pH= 12.9. ...

chemistry
A 20.0 gram sample is a mixture of sodium phosphate ,sodium mono-hydrogen phosphate,sodium dihydrogen phosphate and sodium chloride. The sample is dissolved in 100.0 ml of deionized water and titrated with 1.5 M hydrochloric acid. The initial pH of the solution is pH= 12.9. ...

Honors Chemistry
This is a few of my final review questions. I basically just need to know the steps for each one because my teacher doesn't explain them very well. I would really appreciate some help.

Honors Chemistry
1. .0025 M tartaric acid completely reacts with .0030 M of Al bicarbonate if .913 l of CO2 forms at 298 Kelvin with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molecules of .0035 M hydriodic acid reacts with 25 grams of magnesium bicarbonate how much carbon dioxide ...

math
m=4;(3,2)

math
Managers should consider ethical aspects of their decisions because:

chemistry
heeeeellppppppp

algebra
x^2 +4x +9y^2 -36y +4=0

math
v=lwh

math
1. x^2 + y^2 = 20 x+y=6 2. y=x^2-2x+1 y-3=x How would I go about solving these?

chemistry
need formula to this. Carbon monoxide reacts with oxygen to produce carbon dioxide. If 3.0 Liters of carbon monoxide at STP, how many liters of oxygen are required to run the reaction

physics - college
i think their is a mistake, the answer is incorrect

physics - college
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...

physics - college
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...

chemistry
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium sulfate is added, a ...

chemistry
The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium sulfate is added, a ...

english

Math
Tonya took out a loan to help pay for her house. She borrowed \$50,000 for 15 years at a yearly simple interest rate of 5%. How much interest will she end up paying the bank?

biology
Its A, Mario is wrong

Algebra
If you have a rectangle and increase the length by 20% while decreasing the with by 20% what is the change equated at?

calculus
Find the first derivative for, (e^(x)+ e^(-x))^2

Math
MATH MATH AND MORE MATH

Physics
Because of the Earth's rotation, a plumb bob does not hang exactly along a line directed to the center of the Earth. How much does the plumb bob deviate from a radial line at 35.1° north latitude? Assume the Earth is spherical.

calculus
how did you find f(x)? i didn't know how to do it??

calculus
umm..i don't really know i i didn't know how to do it.. i don't even think i need that part anyway.....and i checked my work and it was x=4 not -4

calculus
Consider a differentiable functionf having domain all positive real numbers, and for which it is known that f'(x)=(4-x)^-3 for x.0 a. find the x-coordinate of the critical point f. DEtermine whether the point is a relative maximum or minomum, or neither for the fxn f. ...

statistics
Five independent samples, each of size n, are to be drawn from a normal distribution where sigma is known. For each sample, the interval (y-bar - 0.96 * sigma/sqrt(n), y-bar + 1.06 *sigma/sqrt(n)) will be constructed. What is the probability that at least four of the intervals...

AP Chemistry
Thank You

AP Chemistry
In the titration of 77.5 mL of 1.0 M methylamine, CH3NH2 (Kb = 4.4 10-4), with 0.38 M HCl, calculate the pH under the following conditions. (a) after 50.0 mL of 0.38 M HCl has been added (b) at the stoichiometric point

AP Chemistry
Thank you very much.

AP Chemistry
Consider 67.0 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 4.500. What volume of water must be added to make the pH = 5.000?

On finding the proper correct answer. It's easier too First read test booklet. The answers will most of the time will be there.( Note I was only checking meanings ver's difinations with booklet & Google Online for proper choice.) Business Management as far being ...

accounting
E4-19 On December 31, the adjusted trial balance of Oslo Employment Agency shows the following selected data. Accounts Receivable \$24,000 Commission Revenue \$92,000 Interest Expense 7,800 Interest Payable 1,500 Analysis shows that adjusting entries were made to (1) accrue \$4,...

Science
which of the following effects would also occur at the end of an Ice Age 1.) an increase in volcanic activity near the equator. 2.) a global rise in the sea level. 3.) a worldwide extinction of the reptiles. 4.)a shorte length of the day. 5.)a complete rearrangement of the ...

english
Did anyone ever get these ?

AP Chem
At a particular temperature, Kp = 0.25 for the following reaction. N2O4(g) 2 NO2(g) (a) A flask containing only N2O4 at an initial pressure of 5.3 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. (b) A flask containing only NO2 at ...

AP Chem
At a particular temperature, K = 1.00 102 for the following reaction. H2(g) + I2(g) 2 HI(g) In an experiment, 1.23 mol H2, 1.23 mol I2, and 1.23 mol HI are introduced into a 1.00 L container. Calculate the concentrations of all species when equilibrium is reached.

AP Chem
At a particular temperature, K = 3.75 for the following reaction. SO2(g) + NO2(g) SO3(g) + NO(g) If all four gases had initial concentrations of 0.580 M, calculate the equilibrium concentrations of the gases.

AP Chem
At a certain temperature, 4.0 mol NH3 is introduced into a 2.0 L container, and the NH3 partially dissociates by the reaction. 2 NH3(g) N2(g) + 3 H2(g) At equilibrium, 2.0 mol NH3 remains. What is the value of K for this reaction?

AP Chem
The following reaction has Kp = 109 at 25°C. 2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.

math
Today only a table is sold at a 28% discount. the sale price is now 666. what was the price yesterday?

Pysics
60*10=600m/s/s

Question
You take the SAT in 11th grade....

algebra
9/22

algebra
popcorn

Calculus
At 4 PM ship A is 40 miles due South Ship B. Ship A is sailing due South at a rate of 20 knots while ship B is sailing due East at a rate of 25 knots. Find the rate of change of the distance between the ships at 3 PM and at 5 PM. At what time were the ships closest together...

AP Chemistry
A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.6 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6X 10-5.

AP Chemistry
Will a precipitate form when 100.0 mL of a 7.5 10-4 M Mg(NO3)2 is added to 100.0 mL of 5.8 10-4 M NaOH? (Hint: Ksp for Mg(OH)2 = 8.9 10-12) Give the value of Q, to support your answer.

AP Chemistry
The solubility of solid Ce(IO3)3 in a 0.20 M KIO3 solution is 4.4 10-8 mol/L. Calculate Ksp.

AP Chem
The Ksp for silver sulfate (Ag2SO4) is 1.2 10-5. Calculate the solubility of silver sulfate in each of the following. 0.30 M K2SO4

What are the three elements of customer service, and how are they important to CRM?. * CRM is (customer relationship management)*

physics
What is the total force on the bottom of a swimming pool 20.5 m by 8.0 m whose uniform depth is 2.1 m?

gov.
ep

algebra
if mary takes 3 hours to mow a lawn and sally takes 5 hours how long will it take them to mow it together

Chemistry
The combustion of 0.1583 g benzoic acid increases the temperature of a bomb calorimeter by 2.93°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) A 0.1710 g sample of vanillin (C8H8O3) is then burned in ...

Chemistry
Consider the following reaction. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(l) ÄH = -891 kJ Calculate the enthalpy change for each of the following cases. 1.00 103 L methane gas at 719 torr and 26°C is burned in excess oxygen.

Chemistry
Consider the dissolution of CaCl2. CaCl2(s) Ca2+(aq) + 2 Cl-(aq) ÄH = -81.5 kJ A 12.4 g sample of CaCl2 is dissolved in 100. g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and ...

Chemistry
A 5.00-g sample of aluminum pellets (specific heat capacity = 0.89 J/°C · g) and a 10.00-g sample of iron pellets (specific heat capacity = 0.45 J/°C · g) are heated to 100.0°C. The mixture of hot iron and aluminum is then dropped into 91.9 g of water...

chemistry
-4.1 KJ

chemistry
The enthalpy of neutralization for the reaction of a strong acid with a strong base is -56 kJ/mol of water produced. How much energy will be released when 185.0 mL of 0.400 M HCl is mixed with 152.5 mL of 0.500 M NaOH?

physics
If it requires 5.5 J of work to stretch a particular spring by 2.0 cm from its equilibrium length, how much more work will be required to stretch it an additional 4.1 cm?

algebra
Multiply , then simplify 5 sqrt:75 - 7 sqrt:3

algebra
solve (x+17)(x-6)(x+14)>0

math
In the bac of an old cupboard you discover a note signed by a pirate famous for his bizarre sense of humor and love of logical puzzles. In the note he wrote that he had hidden treasure somewhere on the property. He listed five true statements and challenged the reader to use ...

Chemistry
How much by mass of Urea (NH2)2CO is required for a 32.5% solution in one litre of water.

Math/Economics
Suppose that a firm has only one variable input, labor, and firm output is zero when labor is zero. When the firm hires 6 workers it produces 90 units of output. Fixed cost of production are \$6 and the variable cost per unit of labor is \$10. The marginal product of the seventh...

Math/Economics
Suppose that a firm has only one variable input, labor, and firm output is zero when labor is zero. When the firm hires 6 workers it produces 90 units of output. Fixed cost of production are \$6 and the variable cost per unit of labor is \$10. The marginal product of the seventh...

Physics
16.28

math
farmer fred had chickens and cows on his farm. he knows that together there are 108 legs and 30 heads. how many of each type of animal does he have?

Principles of finance
a bond has the following terms, Principal amount-\$1000,Semi-annually \$50, Maturity 10 Years, what is the bonds price if comparable debt yields 12%

Physics
A stone is dropped from a high altitude and 3 s later another stone is projected downward with a speed of 150 ft/s. When and where will the second stone overtake the first? Ans. (a) 5.70 s (b) 520 ft

science
A 0.25 kg length of aluminum wire is warmed 10.0 degrees by an electric current. How much heat was generated by the current?

College CHEM
Name for Sn(BrO3)

geometry
X=6

physics
A commuting student leaves home and drives to school at an average speed of 41.0 km/h. After 24.0 min she realizes that she has forgotten her homework and returns home to get it at the same average speed. It takes 9.0 min to find the report, after which the trip to school 41.0...

English
Revise the following sentences to remove all pronoun errors. 41. When a police officer fires his gun, he must fill out a lot of paperwork. 42. When a teacher writes an exam, they think about what aspects of student learning they want to test.

Math
The closing price for XYZ Company's common stock is uniformly distributed between \$10 and \$20 per share. What is the probability that the stock price will be greater than \$17? What is the probability that the stock price will be between \$12.50 and \$16?

american government
no idea

Physics
except for in your equation for the velocity; use the radius of the circle there

Physics
Use the length of the string for "r".

chemistry
Well, My mom use to say "stupid is , stupid does".. I m getting there. Perhaps, this will help..say, you have O3, AsH3 , H2Se, how would you about explaining whether each of these acts like a Lewis acid, Lewis base or either.? Draing the lewis dot seems to imply that...

chemistry
Ok ..how do I know if they can or cannot accept an electron pair? Are these exception to the octet rule?Can you show sturture and explaination.

chemistry
can O3, AsH3 and H2Se act as a lewis acid? please explain.

chemistry
can O3, AsH3 and H2Se act as a lewis acid? please explain.

geometry
two smaller prisms have heights 2' and 10'. If the volume of the smaller prism is 32 cubic feet, find the volume of the larger prism.

Algebra
2 years and 6 months

Statistics
0.246?

math
thank you so much.

math
i need help with just one question, and if i get it, ill be able to do the rest. Okay so its saying let height of a box be 4x+1, width be x-3, and length be 2x. Find the volume. So what do i do? how do i start solving this? its polynomials

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