Questions Asked on
May 21, 2011

Chemistry
Which equation shows conservation of mass and charge? A.NH4Br → NH3 + Br2 B. 2Mg + Fe3+ → Mg2+ + 3Fe C. H2SO4 + LiOH → Li2SO4 + H2O D. Cu + 2Ag+ → Cu2+ + 2Ag It's either b or d, since they both have two elements with an oxidation number of 0. Which
asked by Angie 
Chemistry
Calculate the mass of NaCl produced when 5.50 moles of Sodium reacts with excess chlorine gas.
asked by Zach 
Physics
the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is
asked by sarah 
sociology 101
Using miner's approach describe shoppers in a supermarket
asked by Anonymous 
Human Relations Part 1
1. Strong language often means A. weak feelings. B. risktaking. C. strong feelings. D. shared knowledge 2. Which of these statements is true? A. A good attitude can make you tired. B. Being tired makes it harder to have a good attitude. C. A good attitude
asked by anonoymus 
Chemistry
calculate the total amount of heat needed to change 500g of ice at 10*C into 500g of steam at 120*C. do this by calculating the ehat required for each of the following steps and adding to get the total: step 1. ice (10C)> ice (0C) step 2. ice (0C) >
asked by Lyila 
physics
Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E 19 C is attracted to the socks by a force of 3.0 E 9 N, what is the magnitude of the electric
asked by Kelli Kenyon 
algebra
Who saw the brontosaurus enter the restaurant
asked by Steven 
math
A triangle has a base of 7 ft. and an altitude of 15 ft. Find its area to the nearest tenth. Choose the best answer from the options below: A 52.5 ft² B 53.5 ft² C 54.5 ft² D 55.5 ft²
asked by makeeda 
maths
a cube haas a volume of 27cm3 what is the length of one side of the cube
asked by holly 
Physics(Please Help!!)
Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E 19 C is attracted to the socks by a force of 3.0 E 9 N, what is the magnitude of the electric
asked by Kelli Kenyon 
Geometry
A cylinder has a volume of 200in^3 Determine the volume of a cone whose radius and height are equal to that of the cylinder.
asked by JOY 
physics . really need help
An electric iron of 500 W power is used daily for 30 minutes. If the cost per kW.h is $0.10, what is the weekly expense in using the electric iron??
asked by ashley  HELP PLEASEE!!! 
geometry
What is the volume of a square pyramid with base edge 2cm and height of 2cm. I came up with 8 cm^3
asked by JOY 
math 120
a sample of 12 observations taken from a normal distribution produced the following data. 13 15 9 11 8 16 4 9 0 14 16 12 . construct the 95% confidence interval for mean
asked by umray 
Science
I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?
asked by Marissa 
math
A circle has a circumference of 110.6 mm. Find its diameter to the nearest tenth. Choose the best answer from the options below: A 35.2 mm B 36.2 mm C 37.2 mm D 38.2 mm
asked by makeeda 
maths
a cube has a volume of 27cm3 what is the length of one side of the cube
asked by molly 
Science
A battery of emf 12v nd internal resistance (r) 1.5votls is connected to an external resistance (R) of 3ohms. (1.) Cal, the current flowing in the circuit. (2,) the p.d draw across the 3ohms resitor and the internal resirtance. (3) determine Voltage of the
asked by Usoro 
epidemiology
A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Four hundred (400) people are screened at a clinic during the first year the new test is
asked by mona 
physics
A ball of mass Ml = 0.250 kg and velocity V01 = +5.00 m/s (see Figure) collides headon with a ball of mass M2 = 0.800 kg that is initially at rest. No external forces act on the balls. a) What was the kinetic energy of the first ball before the collision;
asked by Fabiana 
Precalculus
A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.
asked by Mojo 
cultural diversity
Will the rate of intermarriage of Blacks and Whites someday reach the same levels as for white ethnics in the US? Does it matter if the rate of Black/White intermarriages does eventually reach the level for white ethnics? Explain your thinking on this.
asked by Anonymous 
chemistry
in 1807 the English chemist Humphrey Davy passed an electric current through molten potassium hydroxide and isolated a bright, shiny reactive substance. He claimed the discovery of a new element, which he names potassium. In those days, before the advent
asked by kimberly 
Precalculus
A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.
asked by Mojo 
Social Studies
I just need the answer to one question in Florida Studies week 14. I brought mini assessment home to grade and left the papers at school. Question 13 What di the king of spain do after getting Florida back? I think I know the answer but want to be sure.
asked by Debbi 
Math
In triangle ABC, D and E are midpoints of AB and AC, DE=4x and BC=2x+48. Find BC. Thanks So Much!!
asked by Alana 
Math
What is the distance between the parallel planes 2x+y3z=13 and 2x+y3z=35?
asked by sophie 
Physics
A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when
asked by Anonymous 
maths
calculate the surface area of the following prism cuboid; 2cm 6cm 4cm what is the surface area of the cuboid
asked by molly 
math
A man buys 2pens and 4 pencils and gives a hundred rupees note to shop keeper . Shopkeeper ask him to pay Rs10 more to take 4pens and 2pencils. If he bought 2pens and 3pencils how much would the man get back from shopkeeper?
asked by Anonymous 
GEOMETRY
FIND THE LATERAL AREA OF A RIGHT PYRAMID WHOSE SLANT HEIGHT IS 18mm AND WHOSE BASE IS A SQUARE WITH AN AREA 121mm^2
asked by JOY 
math
Convert → 4.2 g = ______ kg. Choose the best answer from the options below: A 0.42 kg B 0.042 kg C 0.0042 kg D 0.00042 kg
asked by makeeda 
math
A trapezoid has bases of 15 ft. and 9 ft. and a height of 8 ft. Find its area. Choose the best answer from the options below: A 95 ft² B 96 ft² C 97 ft² D 98 ft²
asked by makeeda 
math
Convert → 678,000 cm = ____ km. Choose the best answer from the options below: A 5.78 km B 6.78 km C 67.8 km D 678 km
asked by makeeda 
physics
A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when
asked by ryan 
math help
Find the midpoint of A(5, 3) and B(3, 5). Place your answer in (x, y) notation with NO spaces.
asked by BreAnna 
science
a body is moving with a uniform acceleration travels 24m in the 6th second and 44m in the 11th second. find 1). acceleration 2). uniform velocity of the body
asked by Abhilash 
Chemistry
Stomach acid is 0.02M HCl. A 330mg antacid tablet is 41% magnesium hydroxide and 36.2% sodium Bicarbonate. What is the volume of acid that can be neutralized by one tablet?
asked by Alex 
History
Create a timeline tracking the major themes/paradigm shifts in American History from the Columbus's voyages through the MexicanAmerican War (18461848
asked by Demarauis 
Life orientation
In 1oto15 lines critically discuss 5 ways in which the human or enviromental problem impact on the community
asked by Zanele 
english
what a business man need to know about nigeria concepts of personal space and rules of social behaviour in order to conduct business successfully in that country
asked by Anonymous 
math
Find the volume of a pyramid whose base is 6 ft. by 5 ft. and has an 8 ft. height. Choose the best answer from the options below: A 50 ft³ B 60 ft³ C 70 ft³ D 80 ft³
asked by makeeda 
geometry
A square pyramid has a volume of 196 cm^3. Determine the height of the pyramid if the edges of the base measures 7cm.
asked by JOY 
calculus
Using an integration formula,what is the indefinite integral of (sign for integral)(cos(4x)+2x^2)(sin(4x)x)dx. Any help very much appreciated.
asked by gerrard 
algebra
How do i solve this complex fraction?? X+3/3x^2/6x^2/(x+3)^2
asked by makenzie 
substance drug addiction
A clear explanation of drug addiction how human factor that may cause ill health, accidents, crises or disaster.
asked by Ronny 
Computers
Why is the popularity of the internet growing more and more everyday?
asked by JoshelaT 
chemistry
i have two questions. 1. generally speaking, if the pressure of a gas is tripled, what will happen to its volume? 2. If I take 2000L of gas at STP and squish it into a gas 15.0L gas cylinder, what will be the pressure inside the cylinder, assuming the
asked by me 
math
The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.
asked by leroy 
Geometry
What is the volume of a right hexagonal pyramid with base edge of 1 cm and height of 2cm Would I use V=BH 6(2)=12cm^3
asked by JOY 
math
Use quadratic formula to solve each equation 3k^2+6=6 I get 3/2 but I can't seem to get the other half of the equation such as x=3.7 or .26 etc...
asked by beli 
statistics
From a bag containing 6 black and 4 white balls, 2 balls are selected,one after the other,without replacement. Find (a) the probability that they are both black (b)the probability that they are both the same colour, (c) probability that they are different
asked by Moses joseph 
math
Convert → 73 yd = _____ ft. Choose the best answer from the options below: A 19 ft B 119 ft C 109 ft D 219 ft
asked by makeeda 
Prealgebra
Hi need help answering this question? In your own words, define the term equation and then explain what it means to solve an equation. Give an example of an equation and its solution. Explain why it is the solution.
asked by clarissa 
calculus
Please help. What is the area of the region which is bounded by the xaxis and by the graph of y=(20(7x)(x3))/x^2. Thank you for any help.
asked by Amy 
chemistry
How much water must be added to 6.0 mL of a 0.05 M stock solution to dilute it to 0.020 M?
asked by Anonymous 
Chemistry
Stomach acid is 0.02M HCl. A 330mg antacid tablet is 41% magnesium hydroxide and 36.2% sodium Bicarbonate. What is the volume of acid that can be neutralized by one tablet?
asked by Alex 
maths
calculate the surface area of the following prism cuboid; scm 6cm 4cm what is the surface area of the cuboid
asked by molly 
Economics
(a) Explain what is meant by the term “natural monopoly”. (b) Construct a diagram showing the average and marginal cost curves, and the demand and marginal revenue curves for a natural monopoly. Use your diagram to explain why profit maximising
asked by Giska 
physics
Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.
asked by Anonymous 
chem
An ethylene glycol solution contains 23.9 g of ethylene glycol (C2H6O2) in 86.9 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)
asked by Sara 
algebra
What is the value of the expression 2x to the 2nd power + 3xy 4y to the 2nd power when x = 2 and y = 4? please show how to solve this
asked by T 
math
Convert → 678,000 cm = ____ km. Choose the best answer from the options below: A 5.78 km B 6.78 km C 67.8 km D 678 km
asked by makeeda 
math
Convert → 48 in = _____ ft. Choose the best answer from the options below: A 3 ft B 4 ft C 5 ft D 6 ft
asked by makeeda 
math
Convert → 14 qt _____ gal. Choose the best answer from the options below: A 1.5 gal B 2.5 gal C 3.5 gal D 4.5 gal
asked by makeeda 
physics
Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.
asked by Anonymous 
algebra
Annual profit in thousands of dollars is given by the function,p(x)=200square x3 +10,000,where x is the number of items sold in thousands, x less than 3. describe the meaning of the numbers 3 and 10,000 in the formula. find the profit for 5 different
asked by pamela 
english
Can someone please check my work? Looking for opinions and grammatical errors. Thankyou. The following are my instructions on the assignment..... · Resource: Appendix G · Read two of the five paragraphs provided in Appendix G. · Write a brief paragraph
asked by Icelocsgirl 
english
which form of verb tense is the underlined phrase in the following sentence? You should have invited them to the party.
asked by missy 
maths
a prism has a cross sectional area of 8mm2 and a volume of 224mm3 calculate the length of the prism thank you so much for your help
asked by molly 
math
please help... determine if the argument is valid or invalid along with the appropriate form of argument. if harvard hustles then harvard wins harvard wins ___________________ harvard hustles are these statements: valid by law of detachment valid by law of
asked by thawk 
science
I'm in 5th grade and I'm doing a science project on if seawater can be desalted by freezing... I tested three cups of seawater, each with different times in the freezer.. I have my control which is the seawater at room temperature... What do I chart on my
asked by Sam 
math
(24x^4+24x^3=3x^2)divided 8x^3
asked by latonya 
advanced algebra
How would i go about solving this complex fraction? [(x/3)4] / [5+(1x)]
asked by maya 
physics
A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when
asked by Anonymous 
maths
a prism has a cross section area of 8mm2 and a volume of 224mm3 what is the length of the prism
asked by holly 
geometry
How do you find the lateral area and surface area of a right prism whose height is 10 ft and whose base is a rombus with diagonals 12 ft and 12sq root of 3 ( DON'T KNOW HOW TO PUT SQROOT 3 IN)
asked by JOY 
us history
abrham lincoln as a young adult
asked by ethan 
mathematics
by prime factorisation method find the least positive number divisible by 700 and 364
asked by Anonymous 
physics..
Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km. kindly help me to solve this question..
asked by Anonymous 
Algebra
Can i get some help simplifying this fraction? ((x+5)/(x)) / ((x+5)/(2x))
asked by Matthew 
maths
Using your hourly rate computed in part a), what would Mary's gross earnings be for a pay period working an extra 10 hours overtime paid 2 times the regular rate of pay? For full marks your answer(s) should be rounded to the nearest cent.
asked by SANY 
American Government
1. Which of the following is NOT a criticism of the media's influence on public opinion? a. bias in reporting b. negative focus c. watchdog reporting d. visual imagery Answer: b 2. Which of the following is NOT a function of an interest group? a. supplying
asked by Cheryl 
philosophy
What is the influence of television commercials on American culture? If you could do something about TV commercials what would you do?
asked by tiffany 
math am i right?
the polynomial 0.041h  0.018a  2.69 can be used to estimate the lung capacity, in liters, of a female with height h, in centimeters, and age a. find the lung capacity of a 60 year old women who is 190 centimeters tall 9.04 liters
asked by sam 
Microeconomic
(a) Use a normal downward sloping demand curve and an upward sloping supply curve to illustrate and explain the “deadweight loss” from the imposition of a tariff on the imported substitute for a domestically produced product. (b) Use your diagram to
asked by Sisca 
Microeconomic
The Urban Transit Authority receives the following two pieces of expert advice: 1. “You should cut rail fares in order to encourage greater use. Raising fares will mean fewer customers and lower revenue.” 2. “You cannot afford to cut fares as this
asked by Cath 
financail Management
In Area O, there will be more savers than spenders. Old people have usually accumulated more wealth and usually tend to have it in more conservative investments (i.e. fixed income instruments), whether they be bank deposits, bonds, etc. In Area Y, people
asked by Anonymous 
science
WHEN A BOTLE OF ALCHOL SAYES IT IS 80 PROOF WHAT DO THEY MEAN
asked by DEEK 
Math
The length and width of the field as a ratio of 11:7. The width is 20 meters less than the length. How many m2 is the area?
asked by Anna 
GEOMETRY
DdETERMINE THE LATERAL AREA OF A PIPE THAT IS 12FT LONG AND 4 INCHES IN DIAMETER
asked by JOY 
Life orientation(Reaseach)
Critically discuss ways in which the woman or enviromental problem imacts the community
asked by vallencia 
EDU230
What type of character education would you implement in your school? Why? What would your expected results be.
asked by Anonymous 
english
Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in
asked by davis 
Chemistry
A gas at 1.5 atm, 2.3L, and 23degreeC changed to 1.0 atu and 2.8L. What is the new temperature?
asked by Zach 
hrm
What are the critical coponents of a compesation strategy? Would these be the intrinsic and extrinsic rewards or something else.
asked by mb 
5th Grade
write the number13 inbase six
asked by Raja 
chemistry
I need to write an equation that takes place at a temp of 400 K and with a catalyst of iron to make ammonia gas from gaseous nitrogen and hydrogen
asked by sheila 
Computers
What are some alternate ways that you can use the Internet?
asked by JoshelaT 
physics of modern technology
while throwing a football you exert a forward force of 50.0n, on it and push it forward a distance of 1.2m, how much work do you do on the football
asked by sharlene scott 
Statistics
Select the best interpretation of the correlation coefficient r = .87
asked by Scott 
Math
How do you solve the problem: x minus 6.2 is less than or equal to 8 ; x=14
asked by Christina 
geometry
what is the volume of a right circular cone with radius 1cm and height 2cm
asked by JOY 
college math
Construct a truth table for ~q p
asked by kozy