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2011
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Questions Asked on May 23, 2011

The value of delta H for the reaction below is -1107kj.2Ba (s) + O2 (g) -> 2BaO (s) How many kJ of heat are released when 5.75 g
1. 2 answers
2. asked by Thao
3. 10,419 views
As the headboy of your school write a speech on the send forth party of the principal of your school.
1. 23 answers
2. asked by Daniel
3. 9,450 views
How long will it take a charged 80-ìF capacitor to lose 20 percent of its initial energy when it is allowed to discharge
1. 2 answers
2. asked by Katie
3. 5,380 views
A car license plate consists of 6 characters. The first 3 characters are letters excluding I, O, Q and U. The last 3 characters
1. 3 answers
2. asked by corey
3. 4,213 views
A 15.5 mL sample of 0.215 M KOH solution requires 21.2 mL of acetic acid in a titration experiment. Calculate the molarity of
1. 2 answers
2. asked by Tina
3. 3,652 views
A child exerts a tangential 43.5-N force on the rim of a disk-shaped merry-go-round with a radius of 2.41 m. If the
1. 1 answer
2. asked by Sarah
3. 3,591 views
An average person blinks their eyes about 20 times per minute. Estimate the number of times a person will blink in 1 year.
1. 4 answers
2. asked by Ashley
3. 2,853 views
Metaphor or Simile?To laughter and contempt; that she may feel How sharper than a serpent's tooth it is To have a thankless
1. 7 answers
2. asked by Itsmemario
3. 2,694 views
If 15.omL of 0.0250 M aqueous H2SO4 is required to neutralize 10.0 mL of aqueous solution of KOH, what is the molarity of the
1. 3 answers
2. asked by Tina
3. 2,570 views
The surface area of a rectangular prism is 190 square inches, the length is 10 inches, and the width 3 inches. Find the height.
1. 2 answers
2. asked by Mary
3. 2,321 views
Three displacement vectors of a croquet ball are shown in figure below, where |A| = 20.0 units, |B| = 40.0 units, and |C| = 30.0
1. 2 answers
2. asked by Benn
3. 2,218 views
The line 2x+3y=1 intersects the curve x(x+y)=10 at A and B. Calculate the coordinates of A and B.
1. 2 answers
2. asked by Noah
3. 2,017 views
In the movie the American Dream President Andrew Shepard (Michael Douglas) shows the roles of the President. What are examples
1. 3 answers
2. asked by Katie
3. 1,984 views
Several light bulbs, each of resistance 1.5 Ω, are connected in a series across a 120 V source of emf. If the current through
1. 2 answers
2. asked by ashley --- HELP PLEASEE!!!
3. 1,937 views
Determine if the argument is valid or invalid. Give a reason to justify answer.If it is cold, then you need a coat. You do not
1. 1 answer
2. asked by kozy
3. 1,749 views
There are eight sprinters competing for first, second, and third place ribbons. How many different ways can the ribbons be
1. 1 answer
2. asked by Alena
3. 1,617 views
What acid and base must react to form Na3PO4?
1. 1 answer
2. asked by Payton
3. 1,587 views
what are the strengths and weaknesses of using the literal interpretation of the bible?what are the advantages of using the
1. 3 answers
2. asked by Anique
3. 1,403 views
A car traveling 90 km/hr is 100 m behind a truck traveling 50 km/hr. How long will it takethe car to reach the car?
1. 1 answer
2. asked by aayushi vyas
3. 1,339 views
Henry invests $5,000 in a mutual fund with an annual interest rate of 7.5%. He also has a 4-yr, $10,000 loan at 3.75%. When will
1. 1 answer
2. asked by Branson
3. 1,275 views
What are the pros and cons of using your conscience?
1. 1 answer
2. asked by Ramona
3. 1,220 views
1)Forty solid hemisphere each of diameter 2cm , are melted to form a solid cone with a base diameter 6cm .Find the height of the
1. 2 answers
2. asked by Reshma
3. 1,134 views
Who do you spell meadoly?For ex: She can sing in a perfect meadly. :')
1. 3 answers
2. asked by Willy Wonka
3. 1,128 views
A string with a length of 2.5m resonates in five loops. The string linear density is 0.05 kg/m and the suspended mass is 0.5 kg.
1. 1 answer
2. asked by shaquira
3. 1,106 views
Describe and discuss the three steps in developing an affirmative action plan.
1. 0 answers
2. asked by gdlola
3. 1,083 views
Describe the historical development of human resource management from its earliest inception to the present.
1. 1 answer
2. asked by gdlola
3. 1,083 views
in a simple model of a hydrogen atom, the electron revolves in circular orbit around the proton with a speed of 1.1*10^6m/s.
1. 1 answer
2. asked by help help help
3. 1,077 views
I did your corrections. I just wanted to know if all the sentences are correct from a scientific point of view. Thank you.1) DNA
1. 1 answer
2. asked by Henry1
3. 1,074 views
A string with a length of 2.5m resonates in five loops. The string linear density is 0.05 kg/m and the suspended mass is 0.5 kg.
1. 0 answers
2. asked by shaquira
3. 1,073 views
I forgot to add the following statements. Thank you.1)Say, for example, a bit of a DNA molecule has a string of nucleotides in
1. 1 answer
2. asked by Henry1
3. 1,072 views
When 0.4300g of NaNO2 is allowed to react with an excess of HSO3NH2, the volume of water is 24.6 degrees celsius and that of the
1. 1 answer
2. asked by Codec
3. 1,056 views
Okay this poem is making my head hurt! I have to find out its meter and rhyme scheme? I say its a iambic pentameter and made up
1. 1 answer
2. asked by Itsmemario
3. 1,055 views
From a point 50 feet in front of a church, the angle of elevation to the top of the steeple is 48 degrees. Find the overall
1. 1 answer
2. asked by Sandra
3. 1,041 views
You ride your bicycle down a hill, maintaining a constant speed the entire time.1. As you ride, does the gravitational potential
1. 1 answer
2. asked by Kathryn
3. 1,012 views
There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a president, vice-president and treasurer
1. 4 answers
2. asked by corey
3. 1,000 views
I left out the following sentences.I hope you can have a look at them.1) Can you change this 100-Euro note into two 50-Euro
1. 1 answer
2. asked by Henry1
3. 983 views
what is the molarity of a solution containing 15.0 g of NaCl in 1.25 L of solution?
1. 2 answers
2. asked by lucky
3. 981 views
Suppose 22.93mL of KMnO4 solution used in the question above (KMnO4 solution in above question had concentration of 0.02036M)are
1. 1 answer
2. asked by Meso
3. 952 views
What is a letter that starts with Z?
1. 4 answers
2. asked by Hailey
3. 936 views
The wavelength of visible light varies from 0.40 μm to 0.70 μm as the color of the light changes from violet to red. Calculate
1. 5 answers
2. asked by Katie
3. 932 views
What is the wavelength of the emitted photon, when the electron in the hydrogen atom makes a transition from the ni = 5 state to
1. 3 answers
2. asked by Katie
3. 909 views
1/log_2(X) + 1/log_3(x) + 1/log_4(x) +1/log_5(x) =log_5(625)
1. 0 answers
2. asked by PD
3. 908 views
Simply the expression.-1 - (-3x + 2) - 7x + 8
1. 3 answers
2. asked by Justin
3. 898 views
A skydiver jumps out of a ;lane 3 km in the air and reaches terminal velocity after falling for 15 seconds. If he falls at a
1. 1 answer
2. asked by 123
3. 895 views
if you need 10 quarts of juice and have 2 gallons,do you have enough juice?
1. 2 answers
2. asked by Andrew
3. 888 views
true/false A lens that converges light is concave
1. 1 answer
2. asked by peter
3. 876 views
an -ol suffix indicates that an -OH group has been added to a hydrocarbon. Which formula represents 1,2-ethanediol?1 C2H4(OH)2 2
1. 2 answers
2. asked by lisa
3. 868 views
Find the geometric mean of each pair of numbers.1/12, 1/18 I understand to multiply 1/12 * 1/18 and take the sqrt of the answer.
1. 1 answer
2. asked by Jet
3. 863 views
you are standing on a street corner, and you hear a fire truck approaching. does the pitch of the siren stay constant, increase,
1. 0 answers
2. asked by erica
3. 849 views
human factors that couses ill health,accidents,crises or disasters ?
1. 1 answer
2. asked by Themba
3. 843 views
A multiple-choice test has 10 questions. Each question has 5 choices. If a student answers each question by guessing randomly,
1. 1 answer
2. asked by corey
3. 829 views
I'm confused by your reply-Is Day of the Saint like having a second birthday? I thought it was false but then according to your
1. 5 answers
2. asked by Emma-
3. 829 views
what's the difference between genetic engineering and gene splicing?
1. 0 answers
2. asked by BB
3. 814 views
I'd like you to check these sentences grammatically. I also would like you to see if the terminology I used is correct. Help me
1. 1 answer
2. asked by Henry1
3. 789 views
(Two concentric circles are shown)The smaller circle's circumference is 10pi. The chord's length is 24. What is the diameter of
1. 3 answers
2. asked by Hannah Montana
3. 785 views
Besides reducing pollution, why would a hydrogen fuel based care be a better alternative to the fossil fuels benig used in cars
1. 0 answers
2. asked by Lisa
3. 779 views
i need help 88/8its sopposed to be a fraaction 88/8+24+(8-4)+6
1. 4 answers
2. asked by sabrine
3. 776 views
The firm currently uses 50,000 workers to produce 200,000 units of output per day. The daily wage per worker is $80, and the
1. 1 answer
2. asked by Angela
3. 768 views
8(2j-6)>2(4j-4)
1. 1 answer
2. asked by Ashley
3. 760 views
Mexico DF is the word for Mexico City in SpanishI think that is false because they either say Mexico or el DF referring to
1. 1 answer
2. asked by Rita Z.
3. 751 views
Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded
1. 0 answers
2. asked by ashley
3. 744 views
there are ___ parabolas that have a vertex (-3,-4) and pass through the point (-1,4)
1. 1 answer
2. asked by Anup
3. 742 views
Essay question: show all work. Suzie’s flower shop estimates that supplies costs for one month will be given by the polynomial
1. 1 answer
2. asked by Anonymous
3. 737 views
A company has two factories that manufacture tires. Suppose 65% of the tires are manufactured in factory 1 and 35% are
1. 0 answers
2. asked by corey
3. 736 views
What heading (or direction) and airspeed (speed in still air) are required for an airplane to fly 837 mph due north if a wind of
1. 0 answers
2. asked by Miles
3. 726 views
8x+8<24 help plz i need answer
1. 5 answers
2. asked by sabrine
3. 725 views
A plane flies out of city A traveling an average of 325 mph, and reaches city B in 3 hours 24 minutes. On the return flight
1. 1 answer
2. asked by Hannah Montana
3. 724 views
true/false All units of energy are vectors.
1. 1 answer
2. asked by peter
3. 707 views
Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L , the
1. 1 answer
2. asked by Rachal
3. 704 views
true/false the force of friction always opposes motion.
1. 2 answers
2. asked by peter
3. 703 views
A pen placed 13.0 cm from a concave spherical mirror produces a real image 13.5 cm from the mirror.a) What is the focal length
1. 0 answers
2. asked by Laura
3. 699 views
•I am having trouble figuring out this question. Why is (3x + 5) (x - 2) + (2x - 3) (x - 2) not in factored form? Show
1. 3 answers
2. asked by G
3. 685 views
A wheel has a radius of 1 foot. to the nearest foot, how far will the wheel travel in 50 revolutions?
1. 1 answer
2. asked by kayla
3. 683 views
A cylinder flower pot with open top needs to be painted. The height is 9 inches and radius is 3 inches. If it takes Troy 5
1. 2 answers
2. asked by Mary
3. 669 views
What heading (or direction) and airspeed (speed in still air) are required for an airplane to fly 837 mph due north if a wind of
1. 1 answer
2. asked by miles
3. 651 views
Solve the system of equations: what is the y-value in the solution?3x - 5y = -16 and 2x + 5y = 31
1. 1 answer
2. asked by stella
3. 643 views
A train going 60 mph left several minutes before the 63mph train. Traveling on parallel tracks the faster train reaches the
1. 1 answer
2. asked by Hannah Montana
3. 641 views
What are the consequences of drug addiction?
1. 1 answer
2. asked by Themba
3. 637 views
A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice
1. 1 answer
2. asked by Jessica
3. 631 views
A glass of ice water was made by adding six 25 g ice cubes to one liter of water. If the water was initially 25C and the ice
1. 1 answer
2. asked by Jessica
3. 624 views
Suppose a chord of a circle is 32 millimeters long and is 12 millimeters from the center of the circle. What is the
1. 1 answer
2. asked by kayla
3. 622 views
A car license plate consists of 6 characters. The first 2 characters are any letter. The last 4 characters are odd numbers from
1. 3 answers
2. asked by corey
3. 618 views
What is more? 3 quarts of juice or 10 cups of juice?
1. 2 answers
2. asked by Andrew
3. 617 views
what method of dna sequencing would be used to sequence a recombinant plasmid?
1. 3 answers
2. asked by april
3. 615 views
Math - Plane Geometry.BC is a diameter of circle O, and radius OE is parallel to chord CD. Help?
1. 1 answer
2. asked by Brianna
3. 614 views
If 130.0 g Zn reacts, what mass of ZnCL2 are produced?
1. 1 answer
2. asked by mike
3. 608 views
What is the hydrogen ion concentration in a 0.15 molar solution of acetic acid in water at 25 degrees C? Acetic acid is 1.3 %
1. 1 answer
2. asked by Emily
3. 605 views
can someone explain the synthesis reaction from ethane to acetylene?
1. 0 answers
2. asked by anon
3. 605 views
Solve the following equations algebraically for n. Show your working using factorial notation.a) n!/3!(n-2)! = 12 b) 8Pn = 6720
1. 0 answers
2. asked by corey
3. 603 views
When in disgrace with fortune and men's eyesI all alone beweep my outcast state, And trouble deaf heaven with my bootless cries,
1. 2 answers
2. asked by Jess
3. 599 views
The radius of the base of a cylinder is 4x cm is 27 cm and its height is 33 cm. Find the surface area of the cylinder in terms
1. 1 answer
2. asked by Anonymous
3. 598 views
A firm advertises that it is selling 2000 items of equipment for $230 each. Victoria Perkins orders the entire lot at the stated
1. 2 answers
2. asked by Sarah
3. 596 views
Potassium dichromate is orange in an acidic medium.it changes colour to yellow in a basic medium.
1. 0 answers
2. asked by Tshephiso
3. 589 views
DRAW A TEMPERATURE TIME PLOT FOR ICE -STEAM TRANSFORMATION.PLEASE DRAW THE PLOT AS I WAS NOT ABLE TO DRAW IT.
1. 1 answer
2. asked by YASH
3. 589 views
Can you check this very short summary on the second World War, please?1) On 1st September 1939 Germany invaded Poland. England
1. 1 answer
2. asked by Henry1
3. 584 views
Neanderthals lived alongside Homo sapiens for thousands of years
1. 1 answer
2. asked by shannon
3. 575 views
The doctor orders 5 mg/kg medication to be given to a patient who weighs 121 lbs. On hand, we have 0.1 g/ml.How many mg will the
1. 1 answer
2. asked by ana
3. 568 views
t - (-4) = 18
1. 1 answer
2. asked by Megan
3. 565 views
When I came to the North West in July, 1884, I found the Indians suffering. I found the half-breeds eating the rotten pork of
1. 6 answers
2. asked by Emma
3. 563 views
calculate speed,if john travels 220km for 2 hour 30 minutes ,your answer must be in km per hour
1. 1 answer
2. asked by karabo
3. 563 views

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