Monday
December 22, 2014

Posts by Rachel


Total # Posts: 1,257

Physical Science
Why don't oil and water mix?
April 28, 2008

Physical Science
Many dry cereals are fortified with iron, how would you prove that?
April 28, 2008

Physical Science
An acid and a bas react to form a salt which consists of positive and negetive ions. Which forms the positive ions the acid or the bas?Which forms the negetive ions?
April 28, 2008

Physical Science
Pour vinegar onto beach sand in the Carribian and the results is a lot of froth and bubbles. Pour vinegar onto beach sand from California and nothing happens. Wht?
April 28, 2008

Physical Science
How do you know I have done no work? Maybe I am checking my results or maybe I just need to see how you get the results you get, I did not want to over write with everything I came up with so I just post the questions, sorry it will not happen again.
April 28, 2008

Physical Science
What happens to the pH of soda as it loses it's carbonation? Would it effect the taste? Why or why not?
April 28, 2008

Physical Science
How might warmer oceans accelerate global warming?
April 28, 2008

Physical Science
What determines whether a material is transparent or opaque?
April 18, 2008

Physical Science
What do radio wave and light have in commen? What is different about them?
April 18, 2008

Physical Science
What prevents rainbows from being seen as complete circles?
April 18, 2008

Physical Science
In which of these cases does a ripe banana apear black, red light/green light or blue light? Why?
April 18, 2008

world history
who sparked the 30 year's war?
April 15, 2008

English (Frankenstein essay)
i'm writing the same essay basically and this really helped cos i have no idea what frankenstein is on about tbh, thanks! :)
April 10, 2008

Physical Science
What kind of motion should you impact to the nozzle of a garden hose so that the resulting stream of water approximates a sine curve?
April 5, 2008

Physical Science
How does a Doppler effect aid police in detecting speeding motorist?
April 5, 2008

Physical Science
At the stand of a racetrack you notice smoke from the starters gun before you hear it fire Explain.
April 5, 2008

Physical Science
Why is an echo weaker than the original sound?
April 5, 2008

Physical Science
If we double the frequency of a vibrating object what happens to its period?
April 5, 2008

Geometry
The image of P(-1, 5) under a translation is P'(5, 7). What is the preimage of P? Could someone show me steps on how to do this problem, and the answer please? Thank you.
April 5, 2008

Pysical science
What is the net magnetic force on a compass needle?
March 31, 2008

math
How do I complete the square for a quadratic equation? I'm not sure how to do it.
March 25, 2008

math
Am I foiling this right? The problem is (x-5)^2 and I got x^2-10x-10. Is that right?
March 24, 2008

Biology
Can someone please help me ! i dont know how to read a gel electrophoresis. thank you
March 23, 2008

Physical Science
A friend tell you that a refrigerator door beneath it's layer of white painted plastic, is made of aluminum. How could you check to see if this is true withoutscraping away the plastic?
March 22, 2008

Physical Science
I still don't get it.
March 16, 2008

Physical Science
When a car is moved into a painting chamber, a mist of paint is sprayed around it. When the body of the car is given a sudden electric charge and the mist of the paint is attracted to it, prsto the car is quickly and uniformly painted. What does the phenomenon of polorization ...
March 16, 2008

Physical Science
Why does a magnet attract an ordinary nail or paper clip but not a wooden pencil?
March 16, 2008

Physical Science
What is the net magnetic force on a compass needle? By what mechanism does a compass needle line up with a magnetic feild?
March 16, 2008

Physical Science
If every iron atom is a tiny magnet why aren't all iron materials themselves magnets?
March 16, 2008

Physical science
Your right sorry, it is watt-sec.
March 16, 2008

Physical science
What unit is represented by a. joule/coulomb b. coulomb/second c. watt/second
March 16, 2008

Physical Science
There are three ways to cook popcorn, list them and relate hoe cooking popcorn is really an example of three ways heat can be tranferred.
March 10, 2008

Physical Science
What is the purpose of the layer of copper or aluminum on the bottom of a piece of stainless steel cookware?
March 10, 2008

Physical Science
Thank you drwls, you are a lifsaver!!
March 10, 2008

Physical Science
Turn an incandescent lamp on and off quickly while you are standing near it. You feel it's heat, but you find when you touch the bulb that it is not hot. Explain why you felt the heat from the lamp?
March 10, 2008

Physical Science
The heat of volcanoes and hot springs comes from trace amounts of radioactive minerals found in the Earth's interior. Why isn't the same rock at the Earth's surface warm?
March 10, 2008

Physical Science
In your room are things such as tables, chairs and other people. Which of these things has a temperature lower than air? Greater than air? And equal to the temperature of air?
March 1, 2008

Physical Science
After a car is driven for some distance, why does the air pressure in the tires increase?
March 1, 2008

Physical Science
On which temerature scale does the average kenetic energy of molecules double when the temperature double?
February 27, 2008

Physical Science
A 0.6-g peanut is burned beneath 50 g of water, which increases in temperature from 22degreesC to 50 degreesc. What is the exact food value of the peanut? (Assuming a 40% efficiency)
February 27, 2008

Physical science
After a car is driven for some distance, why does the air pressure in the tires increase?
February 27, 2008

Physical science
On a perfect day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward or downward. The total wieght of the balloon, including its load and the hot air in it is 20,000N. Show that the volume of the displaced air is 1700 m3 (Hint:Buoyancy in a Gas)
February 24, 2008

physical science
A merchant in Kathmandu sells you a solid gold 1-kg statue for a very reasonable price. When you get home, you wonder whether you got taken, so you lower the statue into a container of water and measure the volume of displaced water. Show that for 1 kg of pur gold, the volume ...
February 24, 2008

math- Triangle facts
Thanks!
February 14, 2008

math- Triangle facts
Given: 2x-3>7 Prove:x>5 Assume: x<5 or x=5 Using a table with several possibilities for x given that x<5 or x=5 x - 2x-3 1 = -1 2 = 1 3 = 4 4 = 5 5 = 7 It's a contradiction because then x<5 or when x>5, 2x-3< or = 7 So in both cases, the assumption ...
February 14, 2008

math- Triangle facts
Explaining the isosceles theorem. Explain why the SAS Inequality theorem is also called the Hinge theorem. the steps for Indirect Proofs and using an indirect proof with an algebraic problem.
February 14, 2008

math
thanks
February 14, 2008

math
using a triangle to explain the theorem and giving a good example with one.
February 14, 2008

math
How can I explain the angle sum theorem? and whats a good example for it?
February 14, 2008

physical Science
Two people who weigh the same climb a flight of stairs. The first person climbs the stairs in 30 s, while the second person climbs them in 40s. Which person does more work? Which uses more power?
February 10, 2008

physical science
You are at the front of a floating canoe near a dock, you jump expecting to land on the dock, instead you land in the water. Explain this in terms of momentum conservation.
February 10, 2008

Government
Today unions (A) have generally experienced a tremendous increase in membership (B) have not succeeded in organizing any white-collar workers (C) are divided into two large organizations, the A.F.L. and the C.I.O. (D) have generally experienced a decline in membership, ...
February 9, 2008

French
Hey again, i've made the corrects you suggested...and i was hoping you could proof read just to make sure i did them correctly...Thankz Noël La saison de Noël est l'époque de l'année que je préfère. C’est une fête ...
February 9, 2008

French
Hi yall. I have been trying to write this paragraph on Christmas and I was just wondering if someone could read it and see if im totally off the mark....thanx yall La saison de Noël est mon temps favori de l'année. C’est une fête religieuse et il y a...
February 9, 2008

French
Hi, i hope i have correctly made the changes you suggested. I was hoping that you could just re-read it to make sure that i have made all the needed corrections. Thank you so much. :D Noël La saison de Noël est l'époque de l'année que je pr&...
February 9, 2008

French
THANK YOU SO MUCH..i will repost it when i have made the changes
February 9, 2008

French
thanks so much for your help :D
February 9, 2008

French
La saison de Noël est mon temps favori de l'année. C’est une fête religieuse et il y a toujours beaucoup d’activités. Chaque année, je célèbre le Noël avec ma famille et ma famille étendue. L’ann&...
February 9, 2008

French
Le Noël La saison de Noël est mon temps favori de l'année. C’est une fête religieuse et il y a toujours beaucoup d’activités. Chaque année, je célèbre le Noël avec ma famille et ma famille étendue. L...
February 9, 2008

French
Hi yall. I have been trying to write this paragraph on Christmas and I was just wondering if someone could read it and see if im totally off the mark....thanx yall La saison de Noël est mon temps favori de l'année. C’est une fête religieuse et il y a...
February 9, 2008

geography
What does a coast guard have to do with the study of geography?
February 4, 2008

Government
Name four broad categories of the Social Security Program and explain the purpose of each category.
February 3, 2008

Government
Thank you, I haven't been thinking straight lately...
February 3, 2008

Government
The most extensive series of laws protecting labor were passed: A: by the federal government during the New Deal under Franklin D. Roosevelt B: by state legislatures before the Civil War C: by the federal government in recent years under John F. Kennedy
February 3, 2008

American Literature
Thank you!
February 2, 2008

American Literature
Using literary elements, compare and contrast Abigail Adams' letter to her daughter with Jean de Crevecoeur's essay from Letters from an American Farmer.
February 2, 2008

Science
What is the only continent that traces of ancient human life have not been found?
January 31, 2008

math
okay i need to find a complamentry angle whos difference is 12 degrees
January 13, 2008

math
okay i need to find a complamentry angle whos difference is 12 degrees
January 13, 2008

math
how do i do all partial methed
December 18, 2007

English
Anybody have a good essay topic for "Sir Gawain and The Green Knight". Thanks for the help!
December 18, 2007

Math
Why can letters of a Polygon's name be used only once?
December 10, 2007

subject
Do you mean Wikipedia? Try that one, I like using it.
December 10, 2007

Phy
When light passes from air to glass, the light may change direction due to refraction. T or F?
December 9, 2007

German
anyone?
December 9, 2007

German
True or false: The Reichstag refers to the legislative body or Congress in Germany. ??????????????????????????????????
December 9, 2007

math
a rectangle has two sets of parallel sides so it cant be that.
December 4, 2007

math
well, if its not a rhombus or a trapezoid then.... what has two right angles and one pair of parallel sides?
December 4, 2007

math
what am I? I am a polygon and I have two right angles and one pair of parallel sides. Is it a rhombus? Please help.
December 4, 2007


osv
October 29, 2007

History
whats material were Portrait Masks made out of?
October 25, 2007

Soc. studies
what chemical was used to embalm the organs?
October 25, 2007

math
the name and birth place of a famous person born in 1893 and why?
October 24, 2007

Pre Alegbra
I love Pre Alegbra but i don't get it
October 24, 2007

Punctuation within sentences-hyphen
A bleeping sound came from his pocket it was his mobile phone signalling he would have to respond right away wouldnt he can you help me punctuate this sentence?
October 21, 2007

math
13.7b-6.5=-2.3b+8.3
October 19, 2007

Social Studies.
i love chicken
October 17, 2007

science/chemistry
we did a lab on chemical change, where we had to see how a chemical change affcts mass. so we measure the mass of 20ml of copper solution, and 2cm(cubed) of steel wool, and then we mixed them into a flask. soon the steel wool turned rusy, and broke apart. and the duofilm(which...
October 15, 2007

physics
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24 degrees below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration ...
October 9, 2007

history
do all civilizations have laws?
September 25, 2007

history
i need as much information on laws that you can give me PLEASE
September 25, 2007

Geometry
If two angles are congruent, must their supplements be congruent? Thank you, anyone, in advance. c[=
September 25, 2007

science
if a cyclist is traveling at 20km in a half in hour, is her average speed 1okm pher hour?
September 17, 2007

accounting
An investment under consideration has a payback of five years and a cost of $1,200. If the required return is 20 percent, what is the worst-case NPV?
September 15, 2007

Economics
Graph the supply and demand curves of Qd=500 - 2P and Qs = -100 + 3P
September 15, 2007

Economics
Graph the supply and demand curves of Qd=500 - 2P and Qs = -100 + 3P
September 15, 2007

Math
Find the derivative of the quotients: y=4X/(X-3) --What would (x-3) be?
September 13, 2007

Econ/Math Derivatives
Find the derivative of the quotients: y=4X/(X-3)
September 13, 2007

Science
The question is: Scientists do their experimental tests more than once, so they can reduce the effects of chance errors. This is called conducting____________? 14 letters. Anyone know the answer?
September 6, 2007

Math/Econ
If the demand curve is P=12.4-4Qd and the supply curve is P=-2.6+2Qs, What is the equilibrium price? What is the equilibrium quantity?
September 6, 2007

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