Questions Asked on
July 23, 2011

Physics
Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. Its
asked by falcon306 
Physics
The centers of a 15 kg lead ball and a 140 g lead ball are separated by 8.0 cm. What gravitational force does each exert on the other? Answer: 2.2×10^−8 N Now: What is the ratio of this gravitational force to the weight of the 140 g ball? I don't know
asked by falcon306 
Statistics
Under what circumstances is the definitional formula easy to use?
asked by Marjy 
Chemistry
calculate the pH and the pOH of an aqueous solution that is 0.035 M In HCI and 0.080 M in HBr?
asked by Josh 
structured query language math
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not
asked by joe 
Chemistry
Two more need help figuring out how to do: How many liters of water vapor can be produced when 8.23 liters of oxygen gas reacts with hydrogen gas (H2g + 02g = H20g. How many liters of water vapor can be produced if 108 grams of methane gas are conbusted at
asked by Anonymous 
Chemistry
A 50g sample of metal was heated to 100 degrees Celsius and then dropped into a beaker containing 50g of water at 25 degrees Celsius. If the specific heat of the metal is .25 cal/g degrees Celsius, what is the final temperature of the water? A. 27 B. 40 C.
asked by Monique 
CHEMISTRY
AT 25 DEGREES CELSIUS THE STANDARD ENTHALPY OF COMBUSTION OF GASEOUS PROPANE IS 2219.0 KJ PER MOLE OF PROPANE AND THER STANDARD ENTHALPY OF GASEOUS PORPYLENE IS 2058.3 KJ PER MOLE OF P[ROPYLENE. wHAT IS THE STANDARD ENTHALPY CHANGE FOR THE FOLLOWING
asked by Anonymous 
chemistry
How many milliliter of 0.150 M H2SO4 (sulfuric acid) are required to react with 1.87 g of sodium hydrogen carbonate, NaHCO3, according to the following equation? H2SO4 + 2NaHCO3 > Na2SO4 + 2H2O + 2CO2 dont understand this am i suppose to change 1.87 into
asked by Henry 
Math
A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted? Oh goodness, I'm not sure what number to start with :(
asked by Jen 
Physics
How much work is done to move a 1400 kg car from rest to 25 m/s.If this takes place over a distance of 130 m, what is the average net force?
asked by Aditya 
geometry
find the value of x if l is parallel to m. the diagram is not to scale
asked by Anonymous 
Chemistry
What mass, in grams, of oxygen gas (O2) is contained in a 10.5 liter tank at 27.3 degrees Celsius and 1.83 atmospheres Trouble figuring out what formula to use to get the answer...want to understand how to get the right answer
asked by Anonymous 
Am. History
the question was to place events in chronological order 1. French and Indian War begins 2. New Englanders capture Frech port of Oswega 3. The last French fort falls in New York 4. British capture Montreal 5. Treaty of Paris am i right?
asked by Stacy 
programming
Your first procedure is to be named MOVIE_RENTAL_SP and is going to provide functionality to process movie rentals. Based on data that will represent the movie id, member id and payment method your procedure will need to generate a rental id and then
asked by Anonymous 
Algebra
An artifact was found and tested for its carbon14 content. If 77% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years.
asked by Brandi 
math write in sql
Display the list of all departments, with the total number of instructors in each department, without using scalar subqueries. make sure to correctly handle departments with no instructors. Is this the right answer: select department.dept_name from
asked by joe 
Chemistry
At a certain temperature, 0.660 mol of SO3 is placed in a 3.00 L container. 2SO3=>2SO2+O2 Kc=
asked by Josh 
statistics
Students are being surveyed about the weight of books and supplies they are carrying as they attend class.
asked by Anonymous 
physics
to a man walking with a velocity of 3km/h due east the wind appears to blow north .but when he increases the speed to 7km/h due east the wind apeears to blow from north east .what is the actual velocity of the wind?
asked by arsh 
Math
According to the U. S. Census Bureau, the total 2008 U.S. population was 303,824,640. The chart below summarizes the 2008 population for five U.S. States. U. S. State 2008 Population Alaska 686,293 California 36,756,666 Hawaii 1,288,198 Idaho 1,523,816
asked by Jen 
Physics
An object's moment of inertia is 2.5 kgm^2. Its angular velocity is increasing at the rate of 3.0 rad/s^2. What is the torque on the object? In N*m units
asked by falcon306 
Algebra
Aki’s Bicycle has determined that when x hundred bicycles are built, the average cost per bicycle is given by C(x)=0.2x^20.1x+9.743, where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?
asked by Greg 
Biology
What happened if you put the Elodea leaf cells in a solution of 0.5% NaCl,1.8% NaCl and 0.9%NaCl?
asked by Ivy 
early Am. History
the French and Indian war has been called "The War That Made America". Why is this?
asked by Stacy 
algebra
would someone write out the whole process of the following question, including solving for y so that i can see what i am doing wrong. Thank you Solve by the substitution method. write as an ordered pair. 8x3y=94 2x+22=y
asked by babs 
English 12
Does anyone know what book will we be using for poems,short stories and literature in Grade 12?
asked by Dan 
geometry
I found out the first part of which is x for the figure which was 115 degrees.They do give you the other measures of the angles which are 115,155,155,155.135,135,115.The second part of the problem say yo find the sum of the measures of the exterior
asked by Lauren 
comm155
six sentences using pronouns about credit cards and finance
asked by jaleesa 
math
how would i solve 2x+9y=33 x=195y
asked by conswella 
Statistics(Please help)
Assume that 100 subjects received one of four treatment combinations and produced the data reported below. Conduct a twofactor ANOVA and complete an ANOVA table reporting the relevant SS, df, MS, F's. N=100 n=25 the table shows A1 and A2 at the top and B1
asked by Hannah 
alg
1. (20 points) Police use the equation to estimate the speed (s) of a car, in miles per hour, based on the length (x), of its skid marks upon sudden braking on dry asphalt. a. Solve this equation for d. b. A motorist is involved in an accident. The skid
asked by patricia 
Math
Which of the following is a solution to the trigonometric equation 2cos2 x  5cos x + 2 = 0? A) 240 degrees B) 135 degrees C) 270 degrees D) 90 degrees
asked by Kate 
algebra 2
If y varies inversely as x, and y = 12 when x = 6, what is K, the variation constant?
asked by amanda 
education
how are such difference between urban and rural communities with adolescentsocialization declining overtime and why
asked by debbie 
Statistics(Please check)
calculate the probability of the following: A four, three, or spade from a single draw from a 52 card deck. there are 4 4's so 4/52, 4 3's so 4/52 and then 13/52 spades so 21/52 but and one 4 and one 3 are from spades so minus 2 = 19/52 Is this correct?
asked by Hannah 
Math
Solve for L L^2*pi*a 2L*pi*x + pi*x^2=0
asked by Kay 
sciencebiology..cells
please give me those parts of animal cell and plant cell.. please separate it..
asked by diana 
Math
Trigonometry problem: The sides AB and AC of triangle ABC are of lengths 4 and 7 respectively. M is the midpoint of BC. AM is of length 3.5, Find the length of BC.
asked by Kalia 
Chemistry
A girl is celebrating her seventh birthday. Each guest is served one large slice of chocolate cake, a hamburger, French fries, and some oranges. Identify the food groups mentioned above. If one slice of chocolate cake contains 35g of carbohydrate, 15g of
asked by mema 
English
Each of the follwing sentences need to be rewritten so they are grammatically correct, also they each have one grammaitical error such as subjectverb agrrement, run on sentence, verb form and tense or sentence fragment. please help 1. The bank robber
asked by Tina 
math write in sql
I have this question i need to know how to do for a test coming up this week. a)Display the list of all course sections offered in Spring 2010, along with the names of the instructors teaching the section. If a section has more than one instructor, it
asked by joe 
help
In your socks assignment, create 5 scenarios, in which your hourly pay rate and the socks per hour change: the current "child labor" scenario ($0.25 per hour, 4 socks per hour) "GM employees " ($63,6) "Weedheads" ($5,1) "McDonalds employees" ($8,8)
asked by cass 
To Reiny
Can you please help me with those problems i answered you back thanks! :)
asked by Jen 
math
Two angles are complementary. One of the angles is twice the other. The larger angle has a measure of
asked by robbie 
chemistry
What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water? filtration chromatography electrolysis evaporation
asked by Anonymous 
Math
If the odds of winning a raffle are 12:258, what is the probability of winning? 12/270 12/258 258/270 258/12
asked by Melissa 
english
what is the story "the return of the khokababu" who knows this.. where did you get the story?
asked by diana 
English
Is this sentence correct or am I missing a comma? Is there a way to rewrite it so that it sounds better? I have learned how to properly write a complete sentence and to avoid run ons and fragments.
asked by Star 
Math
One card is selected from a deck of playing cards. Determine the probability of selecting: a card greater than 9 or a black card. hmmmmm....i don't play cards, i'm not even sure how many is in a deck...38??
asked by Jen 
Science
How 4D works
asked by Lovelle Dicang 
English
Can you tell me the grammatical error on the following sentences eg:subjectverb agrrement, run on sentence, verb form and tense, or sentence fragment. Also These sentences need to be rewritten. 1. They is both happy. 2. at 3PM I will be feeding the
asked by Tina 
biology
how can i identify the cell if it is plant or animal cell??
asked by diana 
algebra
detail the process of polynomial division when the divisor is a monomial. Demonstrate the process with an example. How does this process change when the divisor is not a monomial?
asked by Vic 
Math
Identify the period in degrees and radians: y = sin2x: y = cos(3/2)x: y = 2sin(1/2)x: y = 1.5cos0.25x:
asked by Kate 
math
suppose a map is scaled so that a half inch represents 25 miles. how many inches of the map represents 87 1/2 miles?
asked by Anonymous 
Chemistry
I have 2 chemicals, A & B. Note: both do not contain buffer salts. Chemical A expires 1 week later. Chemical B expires next year. I prepare solution C (general laboratory reagent)containing Chemicals A & B. When assigning the expiry date of solution C,
asked by anne 
telemarketing
A telemarketer with B2B Communications has a 20 percent historical probability of making a sale during a shift where 100 calls were made. Assign a random variable x, where the value of x is equal to the number of sales made during the shift. Describe the
asked by tom 
Life orientation
What are the 5 ways in which the environmental/human factor impact on the community?
asked by Thendo. brian 
statistics
78% of us homes have a telephone. In a random sample 250 homes, what is the probablity that fewer than 50 do not have telephone
asked by debbie 
Business
I'm writing a paper on the gasoline industry, specifically on how the general environment (i.e. demographics) and task environment (i.e. suppliers, distributors, customers, etc.) affect an organization within the industry (i.e. BP, Shell, ExxonMobil,
asked by Steve 
Business calculus I
at time t, the position of a body moving along the saxis is s=t^312t^2+36t m. find the total distance traveled by the body from t=0 to t=3
asked by alfredia mitchell 
Psychology
I need help in developing an outline to explain the utility of social psychology within education so I can use as a guide to write a paper. I need to focus on both theory and application. PLEASE HELP!
asked by Linda 
math
Two angles are complementary. One of the angles is twice the other. The larger angle has a measure of
asked by robbie 
math
Given: l   m m∠4 = 105° and m∠6 = 50°. m∠2 =
asked by robbie 
Statistics(Ugent Please help!!)
Assume that 100 subjects received one of four treatment combinations and produced the data reported below. Conduct a twofactor ANOVA and complete an ANOVA table reporting the relevant SS, df, MS, F's. N=100 n=25 the table shows A1 and A2 at the top and B1
asked by Hannah 
American Government
The greatest blow to the organinzational strength of U.S. parties was: Multiple Choice answers: A. National convention B. Direct primary C. Jacksonian democracyemergence of PACs D.
asked by NeNe 
social studies
How do the similar cultural and economic environment of the united states and canada help to keep people and goods passing easily from one country to the other?
asked by karen 
informal logic
Officer, please don't give me a ticket. My kids were hungry, and I had to drive fast to get them their food" may commit which fallacy?
asked by bj 
physics
a student tries to open a door at a distance of 1 cm from the hinge at a distance of 10 cm from the hinge and at a distance of 50 cm from the hinge why is a larger force required at 1 cm than at 50 cm?
asked by tom 
Math
How would you graph this x^29/x+5? I keep on getting a weird looking function.
asked by Janey 
resources for education young children part 3
I have three questions hope you can help 2. Which one of the following statements regarding the use of software in class is true? a) the emphasis of the program should be solely on repletion b) it should allow children to make their own decisions rather
asked by beth 
math
As*A= Man A Represent what number?
asked by Barbara 
Health
I am writing a paper and it's asking to include resource information. Could that be the references or citations?
asked by Casey 
Math
How many zeroes in 1070 million? Would that go into billion?
asked by Alice