Saturday
October 25, 2014

Posts by annabelle


Total # Posts: 53

Programming
In Visual Basic Form..
April 29, 2014

Programming
Write a function that takes one positive integer value (call it n) as a parameter and produces the sum of the integers between 1 and n. Hint: The sum of the integers from 1 to n is n*(n+1) all over 2 I know this is how the function should look but I am unsure of how to write ...
April 29, 2014

Chemistry
Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 3.279 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment. The products of the combustion ...
April 27, 2014

Chemistry
Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 3.279 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment. The products of the combustion ...
April 24, 2014

Chemistry
Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 3.279 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment. The products of the combustion ...
April 21, 2014

Inverse Trig
Using -pi/2 ≤ y ≤ pi/2, what are the following solutions? y=arcsin root3/2 y=arcsin 1/2
April 21, 2014

Inverse Trig
What is the general solution to y = arcsin 0?
April 21, 2014

Inverse Trig
How do I simplify arcsin (sin 6 pi) given the interval 0 ≤ theta < 2pi
April 21, 2014

Inverse Trig
What is the general solution to y = arcsin 1?
April 21, 2014

Chemistry
2) What is the empirical formula of a compound containing C, H, O if combustion of 1.23g of the compound yields 1.8g CO2 and .74g of H2O 3) What are the empirical and molecular formulas of a hydrocarbon if combustion of 2.10g of the compound yields 6.59g CO2 and 2.7g H20 and ...
April 10, 2014

Chemistry
Determine the mass of the products formed by the combustion of a 7.6g of a coumpound with emprical formula C7H12
April 10, 2014

Chemistry
but on 4 the spin is Ms= -1/2
March 26, 2014

Chemistry
The principal quantum number, n, describes the energy level of a particular orbital as a function of the distance from the center of the nucleus. Additional quantum numbers exist to quantify the other characteristics of the electron. The angular momentum quantum number (ℓ...
March 26, 2014

Chemistry
A. is wrong that is not one of the answers. I have calculated 1.5912 X 10^-28 but the only near answer is 1.591 x 10^-19
February 15, 2014

Chemistry
1) Calculate the energy. in joules, of a photon of wavelength 1.250x 10^3 nm 2) If 3.011x 10^23 molecules have a mass of 20.04 grams, what is the molar mass of the substance? Is it 40.07g/mol? 3) 47.5g of Boron contains __________ atoms of B? Is it 2.65x10^24 4) What is the ...
February 15, 2014

social studies(check answers)
please check my answers and if there wrong maybe you could tell me the correct one.but thanks anyways. 1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few key leaders. C.It ended ...
January 30, 2014

social studies (CHECK ANSWERS)
1. How did the formation of the National Action Party change Mexican politics? A.It ended the one-party system. B.It consolidated power among a few key leaders.(I PICK THIS) C.It ended the revolution. D.It lessened the power of the president. 2. It is hard for children in ...
January 29, 2014

math(CHECK ANSWERS)
please check my answers. Mrs. Walters drove 160 miles on 5 gallons of gas. How many gallons of gas will she need to travel 256 miles? (ANSWER):160 divided by 5=32 256 divided by 32=8 Stephen read 90 pages in 6 days. If he continues reading at that rate, how long will it take ...
January 29, 2014

math(help)
can anyone answer these 3 answers showing how your work.thanks Mrs. Walters drove 160 miles on 5 gallons of gas. How many gallons of gas will she need to travel 256 miles? Stephen read 90 pages in 6 days. If he continues reading at that rate, how long will it take him to read ...
January 29, 2014

science(1answer)
4.how does the kinectic energy of a 10,000-kg train traveling at a speed of 10 m/s compare with that of a 2,600-kg compact car traveling twice as fast? A.the train has less kinectic energy than the car. B.the train has more kinectic energy than the car.(I PICK THIS) C.the ...
January 29, 2014

science (check answers)
4.how does the kinectic energy of a 10,000-kg train traveling at a speed of 10 m/s compare with that of a 2,600-kg compact car traveling twice as fast? A.the train has less kinectic energy than the car. B.the train has more kinectic energy than the car.(I PICK THIS) C.the ...
January 29, 2014

science(check answers)
2.how would the kinetic energy of a 12,000-kg train compare with the kinectic energy of a 900-kg compact car if both were traveling at the same speed? A.the trains kinectic energy would be equal to the cars kinectic energy. B.the trains kinectic energy would be greater than ...
January 29, 2014

science(check answers)
i pickerd A.
January 29, 2014

science(check answers)
1. A 60-kg cheetah reaches a speed of 30 m/s as it chases its prey.What is the kinetic energy of the cheetah? A.900 j B. 1,800 j C.27,000 j D. 54,000 j
January 29, 2014

math(CHECK ASNWERS)
PLEASE CHECK MY ANWERS THANKS 1.The length of the driveway shown on a blueprint is 2 inches. If the actual length of the driveway is 20 feet, what is the scale of the blueprint? 1 in. = 1 ft 1 in. = 2 ft 1 in. = 10 ft (I PICK THIS) 1 in. = 40 ft 2.Marcus built a model car that...
January 26, 2014

math
hey everyone can you guys please answer these 5 questions or 3 or 2 how many you want to answer I just need answers for these last 5 since I did the rest and thanks to you all because I do appreciate this. 1.The length of the driveway shown on a blueprint is 2 inches. If the ...
January 26, 2014

MATH !!!
PLEASE ANSWER THESE 3 I BEEN STUCK ON ALL DAY AND IM SICK OF THEM JUST WANNA SLEEP..PLEASE LABEL ANSWER WITH A B C D ! 1.which pair of ratio form a proportion? choose all that apply. A. 1/6, 4/20 B. 7/9, 28/36 C. 14/18, 21/27 D. 30/80, 8/18 2.which pair of ratios does not form...
January 24, 2014

math
can someone answer these ive been stuck on them for almost 2 hours !!!!! 1.which pair of ratio form a proportion? choose all that apply. A. 1/6, 4/20 B. 7/9, 28/36 C. 14/18, 21/27 D. 30/80, 8/18 2.which pair of ratios does not form a proportion? A. 3/5, 24/40 B. 30/10, 15/3 C...
January 23, 2014

soical studies
goodjob matt
January 23, 2014

soical studies
yay !!
January 23, 2014

Redland ES
6 children share 5 small pizzas equally? How do I solve this?
January 22, 2014

Algebra 2
A lamppost casts a shadow that is 24 feet long. Tad, who is 6 feet tall, is standing directly next to the lamppost. his shadow is 15 feet long. How tall is the lamppost?
August 24, 2013

can some1 plz recheck my answers
n n
March 13, 2013

maths
v h vhv g g
March 10, 2013

Science
Each student is pulling with a force of 10 newtons
November 1, 2012

chemistry
So I would assume that the answer would be (-393.5)-(0)= -393.5 However, the problem lists the compound heat of formation for water also, which makes me think I have the wrong balanced equation up top, but at the same time no type of coal is specified, so there is no way to ...
July 15, 2012

chemistry
From the following information, calculate the standard change of enthalpy for the combustion of coal. C + O2 -> CO2 COMPOUND HEAT OF FORMATION coal 0.0 carbon dioxide -393.5 water (l) -285.9 oxygen 0.0
July 15, 2012

Physics
When I follow your steps I get 1284 cm/s, so I'm not sure how you're getting 2.08 m/s. What gravitational potential energy term are you referring to?
July 7, 2012

Physics
A 100-g block hangs from a spring with k = 5.2 N/m. At t = 0 s, the block is 20.0 cm below the equilibrium position and moving upward with a speed of 216 cm/s. What is the block's speed when the displacement from equilibrium is 27.0 cm? The answer is 172 cm/s; but I cannot...
July 7, 2012

Physics
How did you go from -(104+64)g*1 + 64gL to L=168/64? When I sum the forces of -(104+64)g*1 + 64gL, I get 3060.72.
June 22, 2012

Physics
A wooden plank with length L = 7.5 m and mass M = 104 kg is centered on a granite cube with side S = 2.0 m. A person of mass m = 64 kg begins walking from the center of the plank outward, as shown in the figure. How far from the center of the plank does the person get before ...
June 22, 2012

chemistry
50.00 mL of OOH was diluted to 250.0 mL with deionized water. In the determination of the total cation concentration, 25.00 mL aliquots of the dilute OOH were passed through a cation exchange column and the eluent titrated with an average 27.42 mL of 0.1134 M NaOH. In the ...
January 26, 2012

Science
Which of the following describes the function of the central vacuole in plant cells? a. It helps reproduction b. It helps regulate water content c. It plays key role in photosynthesis d. It stores food. I think it's D. Am I wrong? 2) What are the similarities of Monocots ...
November 24, 2010

Chemistry- please help ASAP!!!! thank you
S(rhombic)+O2(g)--->SO2(g) change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1. Calculate the enthalpy change for the transformation. S(rhombic)-->S(monoclinic) Our goal is to calculate the enthalpy change for the ...
October 31, 2010

chemistry (quatatative analysis)
How many grams of Ba(IO3)2 can be dissolved in 500 mL of a 0.100 M KIO3 solution at 25 oC? Use activities for this calculation. The solubility product constant for Ba(IO3)2 is 1.57×10-9 at 25 oC.
March 26, 2010

ENGLISH
I've been given this question for the novel THE GREAT GATSBY and have been stuck on how to answer it for hours. "Boy meets girl...boy loses girl" this novel is merely another love story. to what extentdo you share this opinion of the novel? Im not sure how to ...
October 25, 2008

making dot arrays
to make a 14-dot array that has exactly two rows, is this going to have a total of 14 dots or will it be 14 dots per row
September 2, 2008

Spanish 2
Sorry didnt realize I didn't put my answers. Aburran encante fascine interesen molesten Reasoning- to for an Ud. or Uds. command drop the o of the present tense yo form and add e and en for ar verbs and a and an for er and ir verbs
June 12, 2008

Spanish 2
Complete the sentences with the appropriate indirect object pronouns and present tense verb forms.? Modelo- (gustar) A mi ME GUSTAN las peliculas de accion. 1. (aburrir) A nosotros _____ los efectos especiales que no son muy realistas. 2. (encantar) A ti ____ las peliculas de ...
June 12, 2008

statistics
a sample of n=25 scores has a mean of M=60 and a std dev of s=12. Find the z-score corresponding to each of the following scores from this sample. X=66,X=48,X=84,X=55
February 7, 2008

algebra
Help with these please?! Simplify the complex expression: -3 --- 5 - + y x and 2 -- + 2 x+4 ---------- 3 -- + 1 x+4 I cannot decipher what you meant to type. Try using parentheses instead of changing to a new line for fractions. -3/[(5/x)+y] (2/x+4)+2 over [3/(x+4)]+1
May 8, 2007

biochemistry
What chemical transformations are catalzyed by the enzyme i) catalase and ii) nitrogenase ???? confused, please help! In nitrogen-fixing microorganisms, nitrogenase catalyzes the conversion of nitrogen to ammonia. Catalase accelerates the breakdown of H2O2 into H2O and O2, in ...
December 23, 2006

Biochemistry
What properties of the enzymes give rise to their ability to distinguish one substrate from another??? And where can I find information on this? http://en.wikipedia.org/wiki/Enzyme Scroll to Specificity then read from there to Allosteric modulation
December 21, 2006

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