Questions Asked on
September 4, 2010

chemistry
While in Europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 39.0 mi/gal? Assume that 1euro= 1.26; dollars.
asked by Mely 
chemistry
Is diamond a pure substance, a homogeneous mixture or a heterogeneous mixture????
asked by person 
College Chemistry
In this lab: we demonstrated the method of evaporation of a saturated sodium chloride solution. The following question ask: 1) why is sodium chloride chosen for the solute? 2)Suggest reasons why the following were not chosen for the solute? a)Calcium
asked by Tim 
college
If the same amount of heat is supplied to sample of 10.0g each aluminum, iron,and copper all at 15 degrees celsius which sample would reach the highest temperature????
asked by amy 
designer
i need someone to check my answers. i know that i got alot wrong but please no harsh comments. thank you. my answers are at the bottom. Ms. Troy would like you to make a copy of an outfit that she owns and really likes—a sleeveless dress with a
asked by sabrina 
math
Suppose a basketball player is an excellent free throw shooter and makes 91% of his free throws (i.e., he has a 91% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player shoots five free
asked by Sarah 
precalc
A certain drug has a halflife of 2 hours in the bloodstream. The label says to take the drug every six hours. About how much of the drug will be in the bloodstream a month after the patient begins taking 700 mg every six hours?
asked by Anonymous 
Science
A model rocket is launched straight upward with an initial speed of 30.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 160 m. A. what is the maximum height reached by the rocket? B. how long
asked by Taylor 
trig
If cot(x) = −19/18 , where x is in Quadrant IV, what is the exact value of sin(2x)?
asked by Aly 
chemistry
Balance the equation ?C4H10 (g) + ?O2 (g) ! ?CO2 (g) + ?H2O(g) , using the smallest possible integers. What is the coefficient of C4H10?
asked by Anonymous 
precal nightmare
Suppose a U.S. presidential candidate announced that, if elected, he would create a national park out of trash. For a period of one year, all residential and commercial trash usually sent to landfills would be trucked to a central spot. Over time, the
asked by Anonymous 
Physics  elastic collision
Car A, with mass of 1735kg, was traveling north at 45.5km/h and car B, with a mass of 2540kg, was traveling west at 37.7km/h when they collided at an intersection. if the cars stuck together after the collision, what was their combined momentum? Was the
asked by Shaila 
physics
The number of significant figures in 0.00150 is ....
asked by sandhya 
physical science
A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter
asked by ashley 
CHEMISTRY> HELP QUICK! pls
Use the given data at 298 K to calculate ¦¤G¡ã for the reaction 2NO(g) + 2H2(g) ¡ú N2(g) + 2H2O(g) Substance NO(g) H2(g) N2(g) H2O(g) ¦¤H¡ãf (kJ/mol) 90 0 0 242 S¡ã(J/K¡¤mol) 211 131 192 189 a. 270 kJ b. 630 kJ c. 3.46 x 104 kJ d. 667 kJ
asked by Lucinda 
chemistry
The speed of light is 3.00 times 10^8~m/s. How fast is this in miles per hour (miles/h)?
asked by Mely 
Canadian history
1)Canadians have been called “hewers of wood and drawers of water.” What does this phrase mean when applied to the Canadian economy? How valid is the comment for today’s Canadian industries? (Section 13) 2)In the last 5 years Canada's currency has
asked by prethy 
Math  intersection of planes
You are given the following two planes: x+4y3z12=0 x+6y2z22=0 a) Determine if the planes are parallel b) Fine the line of intersection of the two planes. c) Use the two original equations to determine two other equations that have the same solution as
asked by Shaila 
Math  Equations of plane(check)
Consider the plane that contains points A(2,3,1), B(11,1,2), C(7,3,6). a) Find two vectors that are parallel to the plane. Ans: AC, BC or AB will be parallel to the plane. b) Find two vectors that are perpendicular to the plane. Ans: if i find the
asked by Shaila 
Algebra 1
The cube root of the volume of a cube gives the length of one side of the cube . Volume:343 cm^3. A:Find the side length of the cube shown . B:Find the area of each face of the cube.
asked by Gaby 
physics
A dart gun is fired while being held horizontally at a height of 1.38m above ground level, and at rest relative to the ground. The dart from the fun travels a horizontal distance of 7.76. A child holds the same gun in a horizontal position while sliding
asked by Mimi 
quick chemistry
A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. What is solid B
asked by rebekah 
calculus
Use the ratio test to determine whether the series is convergent or divergent. 1/2 + 2^2/2^2 + 3^2/2^3 + 4^2/2^4 + ...
asked by Joe 
phyical science
A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power. (a) How much electrical energy (in kWh) is used? 1 kWh (b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?
asked by ashley 
geometry
The sies of a triangle are 9cm, 12 cm and 15cm. Find the lenght of the perpendicular drawn to the side which is 15 cm.
asked by rishabh 
science
On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances at an electrical cost of
asked by ashley 
physics
a car starting from rest is accelerated at 2m/s(square) for 10s, then moves at constant velocity for 20s and then decelerates at 1m/s(square), finally stops. how far does it travel during its trip? please help me! I need in solution for that problem
asked by Dana 
Physics  Elastic Collision
how is this equation derived V'2= V1(2M1)/(M1+M2) (elastic collision  where one object is moving and the other is stationary)
asked by Shaila 
physics
A vector representing 190 N is oriented at 38◦ with the horizontal. What is the magnitude of its horizontal component?
asked by Nikki 
Criminal Procedure
reasonable suspicion is sufficient for which of the following four areas of police work? A) Arrests B) Traffic stops C) Searches D) Seizures I think its either b or c but leaning more towards c
asked by Melisa 
math
1. A baseball diamond is actually a square, 90 feet on each side. What is the distance from third base to first base? 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a) Solve this equation for
asked by summer 
precalc
The depletion of the Earth's ozone layer has created concern among some health experts. They believe that dramatic increases in the number of illnesses and deaths due to ultraviolet radiation rays may occur as a result of breaks in the ozone layer. The
asked by Anonymous 
calculus
Consider the function f(x)=–3x3–1x2+1x+1Find the average slope of this function on the interval (–2–1). By the Mean Value Theorem, we know there exists a c in the open interval (–2–1) such that f(c) is equal to this mean slope. Find the value
asked by Jin 
Precalculus
There is a piece of wire 200 cm long. It needs to be cut into 2 pieces, with one piece forming an equilateral triangle and the other piece forming a circle. How long must each piece be to maximize the area of each shape?
asked by Ce 
Algebra/Math
Can you help me with this problem? 5(64v)=v+21 I got v= 0.42 but I'm not sure if it's right.
asked by miami 
precal
If lim 1/5^n exists, what is its value? It's either 0.2 or 0
asked by Anonymous 
English
Dangling modifiers  are these right? Second entry is my corrected version. 1. In 1883, massive destruction was caused by the eruption of the volcano Krakatoa, an event recently examined in the book Krakatoa: The Day the World Exploded. In 1883, the
asked by Shawn 
Math  vector equation of a parallelogram
The vertices of a parallelogram are the origin and the points A(1,4), B(3,6), and C(7,2). Write the vector equations of the lines that make up the sides of the parallelogram
asked by Shaila 
Math  equation of plane and vectors
A plane is defined by the equations x4y+2z=16. Find two vectors parallel to the plane.
asked by Shaila 
chemistry
There are exactly 60 seconds in a minute, there are exactly 60 minutes in an hour, there are exactly 24 hours in a mean solar day, and there are 365.24 solar days in a solar year. Find the number of seconds in a solar year.
asked by Mely 
Expository Essay Help
Another way to change these sentences "In conclusion, it takes discipline, time management, preparation, a computer, various tips, finances, and a desire to prepare for a major life change in going back to college for a degree. There are many things that a
asked by Terrie 
Chemistry
In the reaction: Protection of 1Phenylethanol by 3,4Dihydro2Hpyran, 1phenylethanol, 3,4Dihydro2Hpyran and anhydrous ether were added first and stirred in icewater bath before acid catalyst ptoluenesulfonic acid monohydrate was added. The reaction
asked by Alan 
criminal justice
what argument could sloc members make that the payment made don't fit the defintion of an illegal bribe(under the fcpa)?
asked by keri 
calculus
f(x)=8x^3+1x^2–8x+2/–7x^2–4x+9 Find the equation of the nonvertical asymptote. y = Does f(x) intersect its nonvertical asymptote? (yes or no) What is the smallest value of x at which f(x) intersects its nonvertical asymptote? ( Enter No in the
asked by Jin 
Economics
The general supply function for new housing in Miami is estimated to be Qs=96+2P10Pl4Pk where P is the price per square foot of new housing in Miami, PL is the average hourly wage rate for construction workerw, and PK is the price of capital (as measured
asked by Managerial economics 
economics
CRITICAL THINKING why might and economist look at hundreds of cars moving along and assembly line and say , "there is an example of scarcity"?
asked by rolanado 
Math
I have to write < , >, or = for the ? sqrt 2 ? 1.41 sqrt 2 = 1.41421356237... Would it be sqrt 2 > 1.41
asked by Amy~ 
math
I need to see how to arrange 81/5y=10x to mx+b form Is it 1/5y=10x8? I need the slope and y intercept. Thanks much to who ever helps me. Can anyone show me how to work this?
asked by barb 
math %
I hate math,It is hard no matter how I study.What is 30% of $1742.00? If possible I am having problem with a school that keeps the disbersement.I need to learn about how to understand it to know if I been cheated out of money.Online courses in fafas,lender
asked by tris 
math
write this number in decimal form 4.05 * 10^3
asked by ant 
International business /BBB4M1 (Canadian history)
How did "interdependence" and the principle of trade replace "selfsufficiency" among Aboriginals in Canada?
asked by prethy 
algebra 2
what is the additive and multiplicative inverse of 8 and 1.5
asked by monique n 
math
Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. {2,5,47,11,13,48,39,36} A). 18 B). 324.9 C).25.1 D). 24.5 I got 19.3 but it is not one of the multiple choices, am I doing it wrong?
asked by Sarah 
com155
In the passage below bold the adverbs and underline the adjectives. NYPD Detectives Christopher Danson and P.K. Highsmith (Dwayne Johnson and Samuel L. Jackson) are the baddest and most beloved cops in New York City. They don’t get tattoos – other men
asked by michelle 
12th grade
What is a group in Canada that is basically selfsufficient today? Explain
asked by prethy 
health fraud hair products
ok so i have to pick a product basically that is like a fraud and it has to be a hair product. then i have to write a summary about it. so i was thinking a product that claims it can grow hair and stop hair lose. Does anyone know of any products like that,
asked by Maryanne 
eth/125
·Write a 700 to 1,050word essay in which you answer the following questions: Conduct research to determine if the ethnic group colonized or if it immigrated to the United States. What country did they originate from and why did they enter the U. S.? Did
asked by lisa 
algebra
1/x^2+5/x=4 Can someone please help me with this problem by showing the steps that I would have to do to get the answer? I have no idea how to do this. Please help somebody.
asked by jessica 
algebra
Can someone show me how to use the quadratic formula to solve this problem.This is for extra credit.I don't uderstand how to do this, so can someone point out the steps so I can be able to do the other five problem like this one. Thanks again for your
asked by Trina 
science
a ______ is the main unit of measure in the metric system a)millimeter b)kilometer c)centimeter d)meter e) none of the above d
asked by pam 
Com155
Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show
asked by Cassidy 
economics
decision making/ which factor of production is represented by each of the following a) an office building b)an assembly line worker c) a tree used to make paper d)nused oil e) an artist f) a student
asked by rolanado 
computer help!!
I recovered my deleted word file..but i cant open them!! In Microsoft word, it says "select the encoding that your document is readable." Neither can I open the jpg. files...does anyone have any suggestions or even a program that I could download that will
asked by prethy 
science
the waters in the polar region are _______ those in the equator region A. colder than B. warmer than C. The same temperature as D. a and b only e. None of the above a
asked by pam 
Math
Add. (5c^43c^3+4c^2+15c6)+(c^5+9c^3+6c^24c+2)+(8c^4+c^27c8)
asked by Joey 
physics
how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?
asked by cheryl 
environmental science
which of these is an SI base unit? a) joule b) inch c) meter C
asked by pam 
Math
find the value of line x  y line if x = 2 , y = 3 I got 5
asked by Amy~ 
Math (Calculus II)
Rate of change proportional to size: P(t)= P(i)e^kt, where P is population, t is time, k is a constant and P(i) is the initial p or "p naught"; sorry, I don't know the typed notation for subscript. By the way, p(i) is given as 100. The problems are a.)
asked by John 
English
What does this mean? One should not accept people at face value?
asked by Monica 
English
Why should children be taught about child abuse and foster care?
asked by Laura 
algebra
use the quadratic formula to solve the equation 2x^23x=6
asked by jen 
chem
when Flour, water, sugar and other ingredients are combined and baked into a cakeis that a chemical change?
asked by hannah 
Math  equations of lines
A line has the same xintercept as [x,y,z]=[21,8,14]+t[12,4,7] and the same yintercept as [x,y,z]=[6,8,12]+s[2,5,4]. Write the parametric equation of the line.
asked by Shaila 
math
a mountain, 200 feet above sea level, is near a valley 700 feet below sea level. How many feet higher is the mountain than the valley? 900 feet
asked by bart 
science
A ________ is about the size of a dime, the width of a sugar cube, the length of a bee or small bug, or the size of a bean. a) centimeter b) millimeter c) meter d) milliliter e) none of the above a
asked by pam 
Calculus
Give an example of a function f which is defined at c which limit as x approaches c of f(x) exists, but that limit does not equal f(c).
asked by Anonymous 
geography
I an suppose to give an example of a strait. I found the example of  Strait of Gibraltar whic connects the Atlantic Ocean and the Mediterranean Sea. Is that sufficient enough
asked by Reed 
science
a well accepted theory in science is that through chemical means, matter cannot be created or destroyed. because it is well  accepted , it has been proven to be true. true false true
asked by pam 
Writing
What do professional writers need to know about formatting business documents?
asked by Chris 
business
. What are the core components of Liquidation’s business model? 2. Do you think Liquidation will ultimately succeed or fail? Why? 3. How has Liquidation (and similar online services) impacted the travel services industry?
asked by Shay 
Geography
Okay, I think I have the correct answer for this question. Please let me know if I am correct. Which Sea is largest? North, Mediterranean, Caspian, or South China? I find it to be the Caspian Sea at 371000 sq km. Am I correct????
asked by Reed 
Financial Accounting
What is the importance of GAAP? I know GAAP is a collection of methods used to process, prepare, and present public accounting information.
asked by Bryan 
math
given a pair of dice, design and explain two games: one must be fair, and the other unfair.
asked by Tenderly 
science
what is the standard SI unit for measuring mass? kilogram just need to know if that's the right answer or not.
asked by bart 
Math 105
Identify the property that justifies the statement 1q equal q
asked by Shelia 
math
a mountain, 100 feet above sea level, is near a valley 700 feet below sea level. How many feet higher is the mountain than the valley? 800 feet
asked by bart 
Intro to World Religions
Hi, for my review and response paper on gospel of mary I have to inegrate it with other readings that we've done in class: Crow, Osage, Seneca, and Gikuyu creation stories. Eliade. Hymn to Aton (Egyption). Rosemary Ruether: Three Classical Creation
asked by y912f 
Geography
I am suppose to find the answer for the question In which hemisphere is Russia located? I have the answer of the Northern Hemisphere. Is this correct?
asked by Reed 
algerbra 116
the length of a rectangle is fixed at 12 cm what widths will make the primeter greater then 90 cm
asked by cassie 
science
"Tsunamis" are giant waves caused by earthquakes under the ocean floor. They ________ islands and coastlines? a.) provide drinking water for b.) form c.) damage d.) irrigate c
asked by pam 
Math
write an expression for the mean of 4,5,6,7 and 8
asked by Brandon 
Math
Limit as x approaches 8 of [(89x)^(1/3)]/[(x6)^3] ...I'm not quite sure how to approach this question. Help please? thank you!
asked by Anonymous 
science
the width of a door and the length of a baseball ball are about a ______ long. a)meter b)centimeter c) liter d) kilometer e) none of the above A
asked by bart 
math
answer to this problem in scientific notation 4.20 * 10^3 / 6.00 * 10^7
asked by ant 
math
write this number in decimal form 7.73 * 10^3
asked by ant