Questions Asked on
June 28, 2013

physics
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N). (a) How much force
asked by will 
Chemistry
Dinitrogen pentoxide, N2O5, decomposes by firstorder kinetics with a rate constant of 0.15 s1 at 353 K. (a) What is the halflife (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L1, what will be the concentration of
asked by Sara 
Math
Find the area of a circle whose circumference measures 100 cm. Area (to the nearest square centimeter) = cm2 I plugged in everything C = 2 r C=2x3.14x100= 628
asked by sarah 
science
the block is acted upon by its W=200 lb, a horizontal force Q=600 lb, and the pressure P exerted by the inclined plane. The resultant R of those forces is up and parallel to the incline thereby sliding the block up it. determine P and R.
asked by mi 
Calculus
Two cars start moving from the same point. One travels south at 60 mph and the other travels west at 25 mph. At what rate is the distance between the cars increasing 2 hours later? Let x = the distance covered by the south traveling car. Let y = the
asked by Robin 
physics
The Space Shuttle travels at a speed of about 5.45 x 103 m/s. The blink of an astronaut's eye lasts about 111 ms. How many football fields (length = 91.4 m) does the Space Shuttle cover in the blink of an eye?
asked by bobby 
Math
Compute the area of a triangle with a base of 15 cm and an altitude of 10.5 in. Area (to the nearest tenth) = cm2 I plugged everything into the area formula which is A = (1/2)bh . A=.5x15x10.5= I got 78.75 rounded 78.8. The computer keeps saying I am
asked by sarah 
trig
find the indicated vector. let u = (9,1), v=(5,9). Find 3u+v
asked by tony 
Chemistry
When 0.13 g of H2 and 0.18 g of I2 are confined to a 150. mL reaction vessel and heated to 700. K, they react by a secondorder process (first order in each reactant), with k = 0.063 L·mol1s1 in the rate law (for the rate of formation of HI). (a) What
asked by Sara 
statistics
Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.18 ounces and a standard deviation of 0.118 ounces. Use DataDesk to find a 99% confidence interval for the mean volume of Coke in
asked by Katelyn 
Chemistry
Dinitrogen pentoxide, N2O5, decomposes by firstorder kinetics with a rate constant of 0.15 s1 at 353 K. (a) What is the halflife (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L1, what will be the concentration of
asked by Sara 
trig
Write the complex number in trigonometric form, using degree measure for the argument. 12  16i
asked by tony 
Physics
One hundred twenty grams of metal at 88 degree Celsius is poured into a 70 grams insulated cup contains 250 grams of water at 16 degree Celsius .The final temperature of the mixture is 17.5 degree C.Determine the specific heat capacity of the metal.
asked by jey 
trig
Find the indicated roots. Write the answer in trigonometric form. Fourth roots of 256(cos 220° + i sin 220°)
asked by tony 
Physics (Stress & Strain)
A steel bar has a rectangular cross section measuring 1.000cm by 2.900cm and is 8.700m in length. A load of 189000.00N causes the bar to extend 1.500mm. Calculate the stress and strain produced. ANS 1 = kPa (3 decimal places) ANS 2 = (6 decimal places)
asked by Danny 
Chemistry
How would you prepare 50.0 mL of 2.0 M H2SO4 starting with concentrated sulfuric acid (18M)?
asked by Cat 
Eng
When assembling a writing plan for an essay, which of the following should come first? A. The first section of the body of your essay. B. The general idea of your essay C. Material that catches the reader's interest. D. A brief Summary of your conclusion
asked by Jen 
Physics (Stress&Strain)
The Ultimate strength of a round steel rod is 630.000MPa. If a factor of safety of 5.000 is required, what is the maximum permissible load for the rod if it has a diameter of 3.000cm? ANS = kN (Round to 3 decimal places) Safety = 5.000 Rod diameter =
asked by Danny 
Chemistry
How would you prepare 50.0 mL of 2.0 M H2SO4 starting with concentrated sulfuric acid (18M)?
asked by Cat 
Physics(Stress&Strain)
What is the factor of safety of a steel hanger having an ultimate strength of 630.000MPa and supporting a load of 65000.000N. The steel hanger in question has a cross sectional area of 5.300cm. ANS = (Round to 3 decimal places) Load = 65000.000N ultimate
asked by Danny 
math
how do you factor this: 5p + 15q
asked by michelle 
Chemistry (How do I calculate)
Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 6.92°C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00
asked by Ashley 
math check
Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n = 19
asked by Tracy 
Calculus (help steve)
f(x)=−8x^3+6ax^2−3bx+4 has a local minimum at x=1 and a local maximum at x=3. If a and b are the local minimum and maximum, respectively, what is the absolute value of a+b?
asked by Bob 
VBA Programming
I'm trying to create a macro that asks for a loan between 1 dollar and 5 million, and returns different interest rates based on the amount of the loan. For some reason when I type in different loan amounts it automatically makes my rate ".1", when it
asked by Matt 
math
1/2 + (5/6) =?
asked by selena 
Business Communications (English)
(1) should there be a comma before and after Bob Hopkins and per serving (2) Is Administrative Professionals Day capitalized (3)Any numbers corrections or any other punctuation mistakes THANKS!!!!! Your reservations are confirmed to cater your office party
asked by MaryBeth 
Chemistry
The halflife for the secondorder reaction of a substance A is 58.2 s when A0 = 0.63 mol L1 Calculate the time needed for the concentration of A to decrease to the following values. (a) onethird of its original value (b) onesixth of its original value
asked by Sara 
Chemistry
Determine the rate constant for each of the following secondorder reactions. In each case, express your results in terms of the rate law for the loss of A. (a) 2 A B + 2 C, given that the concentration of A decreases from 2.74 mmol·L1 to 1.46 mmol·L1
asked by Sara 
Chemistry
Dinitrogen pentoxide, N2O5, decomposes by a firstorder reaction. What is the initial rate of decomposition of N2O5 when 3.6 g of N2O5 is confined in a 0.77 L container and heated to 65°C? For this reaction, k = 5.2 x 10^3 s1 in the rate law (for the
asked by Sara 
Chemistry
Ethane, C2H6, forms ·CH3 radicals at 700.°C in a firstorder reaction, for which k = 1.98 h1. (a) What is the halflife for the reaction? (b) Calculate the time needed for the amount of ethane to fall from 1.00 103 mol to 2.48 104 mol in a 500. mL
asked by Sara 
Chemistry
The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 125 kJ·mol1 to 75 kJ·mol1. (a) By what factor does the rate of the reaction increase at 293 K, all other factors being equal?
asked by Sara 
Chemistry
Determine the rate constant for each of the following firstorder reactions. In each case, write the rate law for the rate of loss of A. (a) 2 A B + C, given that the concentration of A decreases to onefourth its initial value in 57 min (b) 2 A B + C,
asked by Sara 
Eng
Because the subject of a composition is like a crystal with many facets, you should? A. offer a positive idea for every negative one. B. be very critical of your sources. C. pick one point of view and stay with it. C. offer your reader ideas from several
asked by Jen 
Math
How many square yards are in a room that measures 14 feet by 11.6 feet
asked by Cheryl 
Math
Hi! How do you simplify the following using the laws of exponents? 1. 2m^2 n^3 /(mn^2)^2 2. (2pq)^2 / 2pq^2 For number 1, I don't have any idea but for number 2, I arrived at 1/2p. Is that right? Thanks much in advance.
asked by Perrie 
Business Law
Sam owns an acre of land on Red River. The government dams the river. A lake forms behind the dam, covering Sam's land. Does the government owe Sam anything? If yes why? If no why not?
asked by Trish 
Science Biochemistry
List 3 ways the production of energy from nutrients is regulated in the body.
asked by Bukhak 
math check
Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.6 .
asked by Tracy 
Eng
The most important difference between an outline and finished writing is the A. grammatical structure. B. details. C. order of events. D. sources of ideas Answer is A
asked by Jen 
Business Communications (English)
Please check punctuation for periods and semicolons to make sure they are correct. This is a letter which we had to proofread (keeping same sentencing). Semicolons, for some reason, are difficult for me. THANKS AGAIN FOR YOUR HELP!! Dear Ms. Santiago You
asked by MaryBeth 
geometry
if a scale factor of four is used, the points in the image will be eight times as far from the origin as at he preimage points true or false
asked by Barb 
Spanish Help
1. Sí, sus padres ________ ; Ramón no debe ir a la escuela. A. está enfermo B. tienen razón C. son amables D. viven cerca de aquí I said B 2. ¿Prefieren Uds. una casa pequeña o una casa grande? _______ una casa grande. A. Prefiero B. Prefieres C.
asked by Eri 
accounting
How would you use the financial statement to determine when to the need for the purchase of inventory? Which statement(s) would you use?
asked by Patiance 
trig
Convert the rectangular coordinates to polar coordinates, using radian measure for the angle. (6, 6) 6√(2),7π/4 OR 6√(2),5π/4
asked by tony 
Excel
I have my employee schedule in a excel sheet. It is a weekly schedule that doesn't change week by week, but changes day by day within a week. Every Monday, Tuesday, etc. is the same schedule. In the file are days for Monday, Tuesday, etc.. I don't know if
asked by John 
Calculus
A television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into
asked by Robin 
chemistry
If Liquid A and Liquid B don’t mix, what would you guess about the liquids
asked by Halie 
geometry
Which of the following translations corresponds to the matrix ? a A segment is shifted 2 units up and 3 units to the left. b A triangle is shifted 2 units to the right and 3 units down. c A segment is shifted 2 units to the right and 3 units down. d A
asked by Anonymous 
Writing
SAT essay practice. Please grade,correct, and give feedback. We can succeed only by concert. It is not "Can any of us imagine better?" but " Can we all do better?" Abraham Lincoln Assignment: The excerpt above argues that we can achieve only through
asked by Anonymous 
math
Sina+cosa=root over cosA
asked by prasenit 
math
Sina+cosa=root over cosA
asked by prasenit 
Math
In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes" was the
asked by Tracy 
Math
Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do
asked by Tracy 
Writing
This is the SAT essay practice. I wrote this in 25 minutes. Please give me feedback and make corrections. Grade me based on a scale of 16 ( 1 being poor and 6 being superior). "Only those who dare to fail greatly can ever achieve greatly."  Robert
asked by Anonymous 
VBA programming
How to get isnumeric function to display an "error" message when necessary. Sub DetermineinterestSelectCase() Dim loan As Variant Dim interest As Double loan = InputBox("Enter your desired loan amount, from 1 dollar to 5 million dollars.") Select Case loan
asked by Matt 
physics
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.31 m/s. The car is a distance d away. The bear is 18.6 m behind the tourist and running at 8.01 m/s. The tourist reaches the car safely. What is the
asked by bobby 
chemistry
How many mL of 0.109 M Na2CO3 would be needed to precipitate all of the copper ions in 26.7 mL of 0.159 M CuSO4?
asked by adam 
English Please help ASAP
What does this poem mean and how does it relates to people decision. I need to write an essay about it. Whatever we do, whether we light strangers’ cigarettes—it may turn out to be a detective wanting to know who is free with a light on a lonely street
asked by Meena 
statistics
n youth corp have to stand in a row if all possible permutations;are equally likely. Fine the probability that 2 particular corp members stand side by side.
asked by Shedrach 
maths
a wheel revolves 360 degree revolution in one minute.Find how many radians will the wheel subtend in one second
asked by ayesha 
Statistics.
A person apply for a job in two firms say X&Y, the probability of his been selected in firm X is 0.7, and been rejected in firm Y is 0.5. The probability of atleast 1 of his application been rejected is 0.6. What is the probability he will be selected in
asked by Shedrach 
english grammar
please give me some outlines on this topic  the government has granted a large amount of money to your school to build a hobby room and buy instruments for the school orchestra . why would you like to have the two in your school. please explain a few
asked by tina !!! help me please 
Math
The digits 1,2,3,4,5,6 are arranged to form a 6digit number.What is the probability that the number formed is divisible by 4?
asked by Alan Perth 
Math
967x^3+567x^9?
asked by Dwimu 
chemistry
an iron rod embedded in ice placed in water beaker.what will be level of water when ice melts
asked by shahzad 
Language barriers
Females are passive
asked by Grace 
Math
Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6,.1x Correct: Your answer is correct. . + Correct:
asked by Tracy 
science
How to make a food web with at least 4 food chains showing how the eagles depends on other animals?
asked by kina 
Math (Algebra)
Find the largest integer N for which N−6 evenly divides N^3−6.
asked by Drake 
Physics (Stress & Strain)
What is the factor of safety of a steel hanger having an ultimate strength of 550.000MPa and supporting a load of 79000.000N. The steel hanger in question has a cross sectional area of 7.000cm^2. ANS = (Round to 3 decimal places) ultimate strength =
asked by Danny 
Physics (Stress & Strain)
The ultimate strength of a steel rod is 550.000MPa. If the factor of safety of 3.000 is required, what is the maximum permissible load for the rod if it has a diameter of 4.100cm? ANS = kN (Round to 3 decimal places) ultimate strength = 550.000MPa Factor
asked by Danny 
trig
estimate the components of the vector. Round to one decimal place. [v] = 33.9, θ = 65.9° Find the horizontal and vertical components of v, and write in component form.
asked by tony 
trig
Find the dot product a*b. a= (5,9), b=(4,3)
asked by tony 
reproduction
why doesn't a women body reject the sperms since it is an external organism , instantly i.e, it should have produced the antibodies against it right?
asked by K 
Math
There are two points A=(2,0) and B=(4,0) and a moving point P=(t,t) on the xyplane. If the minimum value of line AP+ line BP is b, what is the value of b^2?
asked by Drake 
trig
Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form. [2(cos 240° + i sin 240°)]^5
asked by tony 
statistics
comment on this statement "The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was $125.00"
asked by daphne 
trig
Solve the equation. Express your answer in trigonometric form. x^5  11 = 0
asked by tony 
algebra 1
4x4y=12 7x+4y=36 matrix
asked by aaliysh 
math
what would be the order from greatest to least 0.181, 0.38 , 0.139, 0.319 . any help would be appreciated. TY
asked by sam 
Physics (Stress & Stain)
The ultimate strength of a steel rod is 600.000MPa. if the factor of safety 3.000 is required, what is the maximum permissible load for the rod if it has a diameter of 6.000cm? ANS = kN (Round to 3 decimal place) Ultimate strength = 600.000MPa =
asked by Danny 
Physics(Stress & Strain)
1) Calculate the tensile stress in a 33.000mm diameter rod subjected to a pull of 30.000kN. ANS= MPa (Round to 3 decimal places) Diameter = 33.000mm = 0.033m 30.000kN = 30000N Area = pi*d^2/4 = 3.1416 * 0.033^2/ 4 = 3.1416 *0.001089/ 4 = 0.0034212024/ 4 =
asked by Danny 
Physics
In a machine shop, a hydraulic lift is used to raise heavy equipment for repairs. The sys tem has a small piston with a crosssectional area of 0.063 m2 and a large piston with a crosssectional area of 0.172 m2. An engine weighing 2800 N rests on the
asked by M&M 
Physics (Stress&Strain)
A uniform bar 1.000 meters in length and having a cross sectional area of 10.000cm^2 is subjected to a loading of 5750.000 Newtons. This load causes an extension to the bar length of 2.740mm. Calculate the stress and the strain produced. ANS 1 = kPa (Round
asked by Danny