Questions Asked on
October 7, 2007

science
when you ride a bicycle at full speed and the bike stops suddenly, why do you have to push hard on the handle bars to keep from flying forward?
asked by kelsie 
Chemistry
How many grams are there in 2.3 x 10^24 atoms of silver? I need to use dimensional analysis, and I'm not sure of the conversions I'd need to solve this problem. Thank you!
asked by Johnny 
biology
how does the extinction of dolphins affect the sustainability of the Earth?
asked by Linda 
science
list as many ways as u can how are crystalline solids connected to science? how are crystalline solids connected to math? how are crystalline solids connected to the world? how are crystalline solids connected to you? why is it important?
asked by kim 
chemistry
give the name of a solvent other than water for dissolving sugar?
asked by shrihari 
Physics/Nautical Mile
Still studying! I have The Macmillan & Silk Cut Nautical Almanac from 1981 which predates WGS84 and they make reference to the NM being 6046 feet at the equator and 6108 feet at the poles. Conversions to metres = 1842.82m and 1861.71m. Remarkably similar
asked by Mike 
Math
George can spend $34.80 for his dinner. He wants to tip the waiter 20% of the cost of his meal. How much money does he spend on the tip? Translate the question into an equation. Do not solve.
asked by Gerald 
Maths
calculate the upper and lower bounds of the following calculations given that each number is written to the nearest whole number 40o divided by 60 10 times 9 multipiled by 1
asked by Disney man 
Strategic Management
Explain the essential compponents of the strategic management process?
asked by Priscilla 
science
how many different types of walnut trees are there and what do they look like?
asked by maura 
chemistry
can someone explain to me how to answer this: Polycarbonate plastic has a density of 1.2 g/c3. A photo frame is constructed from two 3.0 mm sheets of polycarbonate. Each sheet measures 28 cm by 22cm.What is the mass of the photo frame?
asked by S 
Math
How can I solve this equation? 5 2/15+ 7 1/15?
asked by Laurie 
14 line 10 syllable poem
how to do it...what do they mean?
asked by Nick 
Algebra
I am not sure what this question is asking. Please help. Find two consective postitve intergers such that the sum of their squares is 85.
asked by Becca 
Editing
I forgot to post my whole essay on my last question so if someone could edit the next part. It might be confusing as to where I picked up. My last post has the beginning. There had been two attempts to kill the Archduke. One was on Appel Quay where one of
asked by Gina 
English Canterbury Tales
I need help comparing and contrasting The Wife of Bath abd The Clerk from Canterbury Tales.
asked by Audrey 
math
I cannot find the pattern to these two problems. Can you help? 17,_,_,62,_ and the next problem 57,_,_,33,_ Thank you, Mindy
asked by mindy 
AP Biology
After an enzyme is mixed with its substrate, the amount of product formed is determined at 10sec intervals for 1 min. Data: 0 secs. = 0.0 product formed (mg) 10 secs = .25 product formed (mg) 20 secs = .50 product formed (mg) 30 secs = .70 product formed
asked by Mon 
math
y=7x6 When y=0 x=?
asked by Anonymous 
AP CHEMISTRY
Using the tables of enthalpies of formation and entropies of formation, estimate the boiling point for the following liquid: methanol (CH3OH), ethanol (C2H5OH) and acetic acid (CH3COOH). compare to their tabled boiling points. how would i go about working
asked by John 
english
Hello. I am writing an essay about ancient religions in the Middle East, Sumerian and Hebrew. I am wondering whether I should write in the past or present tense because Hebrew is still around today (referred to as Jewish) and there is probably some
asked by Trudy 
Physics
1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
asked by Lee Kite 
Physics
2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
asked by Lee Kite 
Physics
2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
asked by Lee Kite 
Physics
A stone has a mass of 3.0 103 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.86. When the tire surface is rotating at 10 m/s, the
asked by Student 
CHEM
Could you please look over my work and see if I did this correctly? Thanks When 3.200 g of liquid ethyl alcohol (C2H5OH) is burned in a bomb calorimeter containing 3.500 kg of water, the temp rises from 22.84 degrees C to 28.36 degrees C. The calorimeter
asked by Kate 
algebra
I need help on the following Problem: 3x5(3x7)=2(x+9)+45
asked by mm 
Physics
A 74 kg skier is pulled 50 meters up a 30 degree incline. How much work is required to pull the skier up?
asked by Marisa 
ICT  Storage devices
Hi I would like to ask a question Does Cache memory have to be in every computer , and can you explain me breifly this complicated process ?
asked by Student 1 
Geometry
1) Draw a valid conclusion if possible: Parallel lines do not intersect If lines do not intersect, then they have no points in common. **can this logical argument be identified by name? If yes, name it. 2)Draw a conclusion given AB bisects segment XT at
asked by Krissy 
algebra
I need help with a couple of math problems. subtract 5m^2+2m+9 from 7m^25m8 simplify (m^4)^3(m^2)^9/(m^3)^2
asked by julie 
Biology
How do u figure out the initial rate of an enzymatic reaction when they only give the time in seconds and the product formed?
asked by Anonymous 
Calculus TEST!!!!
Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1
asked by Matt 
chemistry
Heat of aluminum is 0.897 J/(g.degrees C) Iron is 0.449 J/(g.degrees C) Which chunk of metal is hotter on a sunny day. (Both painted the same color.)
asked by jane doe 
Chemistry
Under appropriate conditions, molybdenum emits X rays that have a characteristis wavelength of 0.711 Angstrom. These X rays are used in diffraction experiments to dtermine the structures of molecules. How fast would an electron have to be moving in order
asked by Tammy 
Physics
A satellite has a mass of 5750 kg and is in a circular orbit 3.6 * 10^5 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20 * 10^6 m. What is the true weight of the satellite when it is at rest on the
asked by Student 
math
A study to determine whether or not a football filled with helium traveled farther when kicked than one filled with air found that while the football filled with helium went, on average, farther than the one filled with air, the difference was not
asked by Devon 
history/english
Explain how the European desire for profit affected the people of the Congo. i cant figure this out! please please help me its for english but its more of a hostory question
asked by Jeni 
math
A farmer bought a horse for $50.00 Then he sold it for $60.00 He had second thoughts about the horse, and he bought back the horse for $70.00 And then he sold it again for $80.00 What is the financial outcome of these transactions
asked by a................... 
Ques. For Writeacher
What do you mean by (add) in attacking France, id=1191771020
asked by Gina 
CHEMISTRY urgent
Using the tables of enthalpies of formation and entropies of formation, estimate the boiling point for the following liquid: methanol (CH3OH), ethanol (C2H5OH) and acetic acid (CH3COOH). compare to their tabled boiling points. how would i go about working
asked by John 
AP CHEMISTRY
Could you please look over my work and see if I did this correctly? Thanks When 3.200 g of liquid ethyl alcohol (C2H5OH) is burned in a bomb calorimeter containing 3.500 kg of water, the temp rises from 22.84 degrees C to 28.36 degrees C. The calorimeter
asked by Kate 
Physics
A skier of mass 70 kg is pulled up a slope by a motordriven cable. (a) How much work is required to pull him 60m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s? (b) What power must a motor have to perform this task?
asked by Kelly 
Physics
A 50.0kg student climbs a 5.00mlong rope and stops at the top. (a) What must her average speed be in order to match the power output of a 200 W light bulb? (b) How much work does she do?
asked by Kelly 
Physics
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 12.6 m higher than A, with speed v/2. Calculate the maximum height reached by the stone above point B. I was told the equation to this was "h=1/2(v2)^2/g."
asked by Lindsay 
AP Statistics
A researcher wishes to compare the effects of 2 fertilizers on the yield of a soybean crop. She has 20 plots of land available and she decides to use a paired experiment — using 10 pairs of plots. Thus, she will: a. Use a table of random numbers to
asked by Anonymous 
algebra 3
using the equation h(r)=5r whats the range if the domain is (1,0,1,2)?
asked by brad 
AP Calculus
I need to find the integral: int:(x^2+2x+3)/(x^3+3x+9) dx I think I am supposed to use the rule: int:1/u du=lnu+C But I don't know what to do first. Thanks for your help! :) Oh and the answer the back of my book gives is (1/3)lnx^3+3x^2+9x+C
asked by Corin 
Physics
A track star in the long jump goes into the jump at 12 m/s and launches herself at 20 degrees above the horizontal. How long is she in the air before returning to Earth? (g= 9.81 m/s squared) I tried using some formulas but I'm using all of the wrong
asked by ac 
business
you have a offer for a house, what is the best way to responed to the offer and request for a competitive price?
asked by shanae 
Social Studies
Hmmm so my teacher wants us to go online and do some research on why Indians/Native Americans didn't like to sign papers.
asked by Ashley 
english
can you give me a list of topics I can write a speech on? For example: If I wanted to write to the MTA about getting the trains to be on time or more available trains to come more often. I need to persuade an audience to better something.
asked by reba 
English
i need a sample lesson plan for what makes us grow with 15 childrens objectives, material,learning activites
asked by Anna 
Biology 2
How do I identify leaves, there are so many of them. I need a website that has leaves and trees of Mississippi.
asked by Katie 
...Physics...
A jet moving at 500 km/h due east moves into a region where the wind is blowing at 120 km/h in a direction 30 degrees north of eat. What is the new velocity and the direction of the aircraft relative to the ground? I am completely lost on this question...
asked by ac 
Biology
Why do males have the ability to produce 4 viable sperms while females can only produce one egg in the process of meiosis?
asked by Maggie R. 
Biology 2
My computer wants me to install something called Shockwave player 10.2 to use to website... are there any others that can help me identify the leaves
asked by Katie 
General/( Bio 2)
What is ActiceX that keeps showing up on my computer?
asked by Katie 
math
how would i find the derivative of this problem: t.3t^2+cos 4t? I don't know how to find the derivative of cos 4t
asked by jessica 
physics
A volleyball player spikes the ball. The ball hits the floor with a velocity of 21.2 m/s at 30 degrees above the horizontal floor, 4.66 m away from where she spiked it. What was the ball's initial velocity (immediately after the player hits the ball)? Give
asked by Anonymous 
Chemistry To Bob Pursleyy
I am having a hard time on how to get V in wavelength= h/mv If I multiply by mv then I get W(mv)=h Then I get Wmv=h I divide by Wm and get V=h/Wm ...but that doesn't seem to work. My other question is if I am using the correct values. W (wavelength or
asked by Tammy 
Editing
Could someone edit this for me... In 1915, the 1st Canadian Division was recognized as a fighting force, for holding their ground against a new type of warfare; chlorine gas. It was at the Battle of Ypres where the Germans released 160 tons of poisonous
asked by Gina 
science
during prophase one of meiosis, are there 46 homologus pairs per cell or 23?
asked by Janelle 
Physics
1. The problem statement, all variables and given/known data A student pulls on a box up an incline of 10 degrees. The student pulls with a force of 180 N directed at 30 degrees above the line of the incline. The box has a mass of 28 kg, and the
asked by Tim 
probability
a box contains 25 computer diskettes, 5 of which are double density and the remiander are high density. A second box contains 15 diskettes, 10 double density and 5 high density. A box is selected at random and then two diskettes are chosen randomly from
asked by Josh_DB9 
spanish
what are the main types of dances in Chile?
asked by kathy 
Editing
I made some more changes. Could someone please edit it again? In 1915, the 1st Canadian Division was recognized as a fighting force, for holding their ground against a new type of warfare: chlorine gas. It was at the Battle of Ypres where the Germans
asked by Gina 
physics
The cavle on an elevator is what pulls the elevator up, and allows it to come down safely. The mass of the elevator is 1400 kg. If the elevator starts from rest and is pulled upwards with a constant tension of 18 kN, what will its speed be after moving 6m?
asked by Anonymous 
math
how would you write 20,500 in exponential notation form .
asked by lawren 
physics
A skier of mass m kis down a 30 degree slope. By measuring her acceleration a, the coefficient of kinetic friction mk between the skis and the snow can be calculated. Show that mk=(g sin 30a)/(g cos 30) SO I know that sin 30 = opp/hyp and cos 30 =
asked by Anonymous 
Algebra II
Bolivian coffee sells for $4.59 per pound, and Columbian coffee sells for $5.95 per pound. How many pounds of each coffee should be mixed to produce 4000 pounds of a mixture that will be sold for $5.10 per pound? I think this is a system of equations but
asked by Tammy 
Science
What is alteration of generation for plants?
asked by Danisha 
Science
If the mass is 5 kg, what is the weight???
asked by Nellie 
Bio 2
What shape and leaf margin and vein pattern do pine trees have?
asked by Katie 
Social Studies: The Revolutionary War
How did the fighting at Lexington and Concord affect the relationship between the colonies and the Great Britain?
asked by Ellen 
business and society
I need to find 3 business in my comunity: one that is formed as a sole proprietory, one that is formed as a general partnership, and one that is formed as a corportion. Identify the business and explain what characteristic of the business form led the
asked by omar 
Social Studies: The Revolutionary War
What did the First Continental Congress achieve?
asked by Ellen 
science(chem)
How many mg of fluorenone can 0.53mol of sodium borohyride(NaBH4) reduce? ~I don't know how to get this..wouldn't I have to have a reaction equation given to me?? Well I didn't have one for the question given to me so I don't know what to do. I tried
asked by ~christina~ 
S.S.
Why didn't Native Americans like signing papers. HA HA sorry I asked earlier. But my partner just called me and said she didn't find her answer. =P
asked by Ash <3 
Science (biology 2)
I need help with leaf shape of tree leaves (Honeyloust)
asked by Katie 
business
Let's say that you and two partners want to start a company that specializes in special occasion gift baskets for individuals and corporate clients. You want to have a storefront in the local shopping mall or shopping area, as well as a vertual starfont on
asked by omar 
Calculus Help!!!
Find the derivative if y=e^(2x)lnx^(2) Im stuck, all i have is 2e^(2x)2/x
asked by Matt 
Calculus Help!!!!
Fnd the derivative if y=x^(1+sqrt2) Is this right (1+sqrt2)/(x) x^(sqrt2)
asked by Matt 
Calculus Help!!!
Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1 Do you have to simplify the problem to get y on one side. or is your u=x^2 v=y^2 du=2x dv=2y if so then what next?
asked by Matt 
geometry
all students like vacations change to if then form
asked by norma 
Calculus Verification
I just want to make sure im right. Find the derivative if y= arcsec(x+3). I got 1 ======================= x+3sqrt(x+3)^(2)1 Is this the final answer or do you need to solve (x+3)^2 and get (x^(2) + 9x + 9)
asked by Matt 
physics
The leader in a bicycle race passes your viewing position at t=0 with a speed of 30 mph. Ten seconds later, the next racer goes by at 40 mph. Assuming their speeds are constant, where will the second cyclist catch up to the first? (Give this as a distance
asked by Anonymous 
geometry
8(4+9x)=7(211x)
asked by tina 
chemistry
what is the importance of obtaining the percent yield of a product. for instance i had to do steam distillation to obtain eugenol benzoate. once i calculate the % yield what could be the importance apart from that's the amount of product obtained
asked by manny 
physics
From inside your apartment, you watch rain fall straight down at a constant speed of 9 m/s. Your friend L calls you as she is driving toawards the west at a constant of 90 km/hr. What with what velocity does L see the rain fall as she looks out her
asked by Anonymous 
Biology II
What is the scientific name for of a canning pear tree?
asked by Katie 
Biology II
What is the scientific name for of a canning pear tree?
asked by Katie 
math
Which label describes the following? 3x +6 =10
asked by kayla 
Physics for Quidditch
I posted the question about the rain before and I understnad how to find componnets...but how would I do that without a given angle?
asked by Anonymous 
math
Which label describes the following? 3x +6 =10 A). Expression B). Linear equation C). Equation which is not linear
asked by kayla