Thursday
March 30, 2017

# Posts by mar

Total # Posts: 69

Math Trig
A ladder 15 m long can so be placed that it will reach a point on a wall 10 m above the ground. By tipping it back without moving its feet, it can be made to reach a point on another wall 8 m above the ground. What is the horizontal distance between the walls?
March 2, 2017

chemistry
empirical formula for K 60.0% C 18.5% N 21.5% and P 7.5% I 92.5%
February 20, 2017

History
What were the characteristics of English colonies in the Chesapeake region, the Carolinas, the middle Colonies-Pennsylvania, New York, New Jersey, and Delaware-and New England prior to 1700? "The Restoration in the Colonies," and"The Middle Colonies and Georgia&...
January 26, 2017

science
Carbon+argon= + =
September 2, 2016

algebra
car averages 20 miles per gallon of gas in city driving and 30 miles per gallon in highway driving. At these rates, how many gallons of gas will the car use on a 300-mile trip if 4/5 of the trip is highway driving and the rest is city driving?
August 4, 2016

math
Square of a side x are cut from each corner of an 8 inches * 5 inches rectangle, so that its sides can be folded to make a box with no top. Define a function that can represent the volume of this box.
June 26, 2016

physics
Soft tissue has a linear attenuation coefficient in the range of μ = 0.35 cm−1 at 30 keV and μ = 0.16 cm−1 at 100 keV. For this problem we use μ = 0.21 cm−1, which applies at around 50 keV incident X-ray energy. (a) What fraction of X-ray ...
March 21, 2016

chem
the mass/volume percent of a NaCl solution in which 136 g of NaCl is dissolved in enough water to give a total volume of 4.90 L .
August 1, 2015

math age problem
Three years ago, Jim was half as old as Tom. Three years from now, Jim will be half as old as Michael. If Jim's age now is half as old as Michael's age three years ago, How old are Jim, Tom and Michael at present?
July 3, 2015

Elementary Statistics
determine whether the given is a statistics or parameter. 1.) There are 50 capitol states in the US. Answer: Parameter 2.) Among the flights included in the sample of flights in Data set 15 in Appendix B, 21% arrived late. Answer: Statistics
May 26, 2015

chemistry
600 gallons of 15 M nitric acid were added to a lake. The initial pH of the lake was 5.90 and the final pH was 3.70. What is the volume of the lake?
March 13, 2015

chemistry
How do I find the initial rate of reaction for 4.)? 2NO(g)+Cl2(g) ---> 2NOCl(g) [NO] (mol/L) [Cl2] (mol/L) Initial Rate (mol/L * min) 1.) 0.20 1.) 0.10 1.) 0.63 2.) 0.20 2.) 0.30 2.) 1.92 3.) 0.80 3.) 0.10 3.) 2.58 4.) 0.50 4.) 0.50 4.) ???
February 14, 2015

chemistry
how do I write the rate of the reaction for the following: Cl(g)+O3(g)-> ClO(g)+O2(g)
February 10, 2015

chemistry
ok so 34+273=307 307X1/2=153.5 .693/153.5=.0045 I think its a second order reaction what do I do for that??
February 10, 2015

chemistry
the half-life of the reaction, at 34 degrees celsius and Ppan=13.2 torr, is 164.0hr. Calculate the rate constant for the reaction. confused on what to do here
February 10, 2015

chemistry
The question is: What statements are true for the standard entropy change for the conversion of ozone to oxygen? The choices to pick from are: 1. Molecular factors predict an increase in entropy 2. Stoichiometric factors predict a decrease in entropy. 3. Molecular factors ...
February 4, 2015

chemistry
I'm not really sure what liquid H20 kj/mol is?
February 1, 2015

chemistry
sucrose change of H is -2226.1kj/mol fructose change of H is -1265.6KJ/mol calculate the enthalpy change for the hydrolysis reaction of sucrose. sucrose + H2O(l)-> C6H12O6(s)+Fructose Is it just the products-reactants?? I'm confused.
February 1, 2015

chemistry
Co2(aq)->Co2(g) calculate the free-energy change for this reaction at 25 degrees Celsius.
February 1, 2015

chemistry
The question is: What statements are true for the standard entropy change for the conversion of ozone to oxygen? The choices to pick from are: 1. Molecular factors predict an increase in entropy 2. Stoichiometric factors predict a decrease in entropy. 3. Molecular factors ...
February 1, 2015

chemistry
what statements are true for the standard entropy change for the conversion of ozone to oxygen? Select all the apply? 2 O_3 (g) > 3 O_2 (g) Molecular factors predict an increase in entropy Stoichiometric factors predict a decrease in entropy. Molecular factors predict a ...
February 1, 2015

calculus
so it would not be 50 either but 5?
November 30, 2014

calculus
November 30, 2014

calculus
how did you get the 150? I was thinking it would be 50
November 30, 2014

calculus
The number of U.S. citizens 65 and older from 1990 through 2050 is estimated to be growing at the rate of, R(t)=0.063t^2 -0.48t+3.87, (0 less than or = t less than or = 15) million people/decade, where t is measured in decades and t = 0 corresponds to 1900. Show that the ...
November 30, 2014

physics
A train is moving parallel and adjacent to a highway with a constant speed of 24 m/s. Initially a car is 48 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s ^2 . What is the speed of the car just as it passes the train?
September 14, 2014

physics
A speeder passes a parked police car at a constant speed of 25.8 m/s. At that instant, the police car starts from rest with a uniform acceleration of 2.68 m/s^2. How much time passes before the speeder is overtaken by the police car? Answer in units of s How far does the ...
September 14, 2014

Science
Leigh is right everybody I just got a 100%
May 10, 2014

Math
dependent variable
November 1, 2013

English
Can anyone help me figure out what's wrong with this sentence? "The lighthouse is further away than it first appeared."
October 2, 2013

statistics
Assume that you are preparing a report on MM207 statistics students at Kaplan University to present to the Kaplan Board of Trustees. Prepare an appropriate graphical representation for each of the following variables. a) The different majors of students taking MM207. b) The ...
May 28, 2013

Physics
Ten meters away from a long straight wire, the field is 10-4 (10 to the negative four) Tesla. What current flows through the wire? I know the answer is 5.0kA but I am not sure what formula to use.
March 12, 2013

Quantum Physics
a) What quantum state do you have to input in order to get output |00⟩ ? b) What quantum state do you have to input in order to get output |11⟩ ?
March 11, 2013

Mechanics
A hunter aims directly at a target on the same level of 120m away. a.) If the bullet leaves the gun at a speed of 250m/s, by how much will it miss the target? b.) At what angle should the gun be aimed so the target will be hit?
February 7, 2013

physics
Amass of 0.5 kg is whirled at 120 rpm in a horizontal circle at the end of a string 2 meters long. Neglecting the force due gravity, find: (a) the angular velocity (b) the centripetal acceleration.
August 17, 2012

Accounting
Identify whether each description best applies to a periodic or a perpetual inventory system. a. Provides more timely information to managers. b. Requires an adjusting entry to record inventory shrinkage. c. Markedly increased in frequency and popularity in business within the...
April 11, 2012

accounting
Discuss the ethics of what Amy is doing. Are there any consequences to her actions? How does the store account for Amy’s returns?
April 10, 2012

accounting
What items appear in financial statements of merchandising companies that do not appear in the financial statements of service companies? Why is there a difference?
April 10, 2012

Accounting
What is the difference between cash basis and accrual basis accounting? Why do accrual-basis financial statements provide more useful information than cash-basis financial statements? Describe when each method (cash basis and accrual basis accounting) would be appropriate to ...
March 26, 2012

Current political issues in the US
It would be very much helpful if you specify those issues you mentioned (: Thanks!
November 16, 2011

Current political issues in the US
Could any one help me name some current political issues here in the US? Thanks in advance!
November 16, 2011

NEWTON'S LAWS (FORCES)
Two boxes, A and B, are connected to each end of a light vertical rope, as shown in the following figure. A constant upward force 78.0N is applied to box A . Starting from rest, box B descends 12.3 m in 3.80s . The tension in the rope connecting the two boxes is 30.0 N What is...
October 8, 2011

physics
Two boxes, A and B, are connected to each end of a light vertical rope, as shown in the following figure. A constant upward force 78.0N is applied to box A . Starting from rest, box B descends 12.3 m in 3.80s . The tension in the rope connecting the two boxes is 30.0 N What is...
October 8, 2011

Math - Possible or Potential rational zeros
2x^5+9x^3+3x^2-6
June 1, 2011

acc 280
P3-1 A Tony Masasi started his own consulting firm, Masasi Company, Inc., on June 1, 2008. The trial balance at June 30 is shown on page 129. MASASI COMPANY, INC. Trial Balance June 30, 2008 Account Number Debit Credit 101 Cash \$7,150 112 Accounts Receivable 6,000 126 Supplies...
March 29, 2011

acc 280
E3-3 Conan Industries collected \$100,000 from customers in 2008. Of the amount collected, \$25,000 was from revenue earned on account in 2007. In addition, Conan earned \$40,000 of revenue in 2008, which will not be collected until 2009. Conan Industries also paid \$70,000 for ...
March 29, 2011

math
there are 80 fourth graders in school of these, 35 were boys. what fractional part of the fourth graders were girls
March 23, 2011

math
there are 80 fourth graders in school of these, 35 were boys. what fractional part of the fourth graders were girls
March 23, 2011

Chemistry
We're learning about single displacement reactions. What happens when Mg + Zn two nitrate reacts? And when Al + Zn two nitrate reacts? Are there colour changes or precipitates formed?
March 17, 2011

Economics
animation
March 6, 2011

Physics
Apparently you must use sine instead of cosine. Im still on a mission to find out why though.
March 3, 2011

finance
What major benefits do corporations and investors enjoy because of the existence of organized security exchanges?
March 1, 2011

PHYSICS
A 69.0 firefighter climbs a flight of stairs 22.0 high. How much work is required?
February 13, 2011

Math
what's the 32.2ft/s^2
February 6, 2011

algebra
A line passes through (7, –6) and (8, –5).
December 1, 2010

math
A group of goats&duck s hav a total of 99 heads n legs among thm. Ther r twice as many ducks as ther r goats. How many r ther of ech?
November 19, 2010

PHYSICS
An object of mass M = 1,284 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50 degrees with the horizontal. What is the magnitude of the force that is exerted by the inclined surface on the object? (I'm using 1.284*9.81*...
October 14, 2010

math0301
How do i translate this phrase into algebric expression and how do i label. Twice the difference of a number and eight
September 16, 2010

algebra
Please help, very lost Evaluate the exponential function for three positive values of x, three negative values of x, and at x=0. Show your work. Use the resulting ordered pairs to plot the graph; submit the graph via the Dropbox. State the domain and the range of the function...
September 11, 2010

algebra
Solve. Where appropriate, include approximations to the nearest thousandth. If no solution exists, state this. log[5] (5x - 1) = 1
September 10, 2010

Accounting
1. Capital : 183750 Labor: 146774
August 16, 2010

psychology
Joe ,aq high school junior , is considering a career in medicine but he is unsure if he want to commit himself to several more years of schooling .with whom is he most likely to consult with on this issue a)best friend b)girlfriend c)parents d)guidance counselor
July 13, 2010

Childcare
A. STYROFOAM
July 12, 2010

where do i put commas? where were you at 10 am on feburary 14 1992
April 17, 2010

english
It's always best not to start trouble that you can't finish.
January 16, 2010

chemistry
what two? metals that will not generate hydrogen gas when treated with an acid
April 14, 2008

Mitosis
the phases of mitosis are prophase, metaphase, anaphase, and telophase.
January 7, 2007

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