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Posts by Rachel

Total # Posts: 1,536

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?

Physical Science
I still don't get it.

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 ...

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

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?

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

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

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

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.

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

Physical Science
Thank you drwls, you are a lifsaver!!

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?

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?

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?

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

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

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)

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

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)

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 ...

math- Triangle facts
Thanks!

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 ...

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.

math
thanks

math
using a triangle to explain the theorem and giving a good example with one.

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

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?

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.

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, ...

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 ...

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...

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&...

French
THANK YOU SO MUCH..i will repost it when i have made the changes

French
thanks so much for your help :D

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&...

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...

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...

geography
What does a coast guard have to do with the study of geography?

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

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

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

American Literature
Thank you!

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.

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

math
okay i need to find a complamentry angle whos difference is 12 degrees

math
okay i need to find a complamentry angle whos difference is 12 degrees

math
how do i do all partial methed

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

Math
Why can letters of a Polygon's name be used only once?

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

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

German
anyone?

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

math
a rectangle has two sets of parallel sides so it cant be that.

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

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.


osv

History
whats material were Portrait Masks made out of?

Soc. studies
what chemical was used to embalm the organs?

math
the name and birth place of a famous person born in 1893 and why?

Pre Algebra
I love Pre Alegbra but i don't get it

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?

math
13.7b-6.5=-2.3b+8.3

Social Studies.
i love chicken

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...

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 ...

Pre-Algebra
klkl

history
do all civilizations have laws?

history
i need as much information on laws that you can give me PLEASE

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

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

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?

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

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

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

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

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?

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?

Math/Econ
P=12.4-4Qd How do you get P into this equation to make it Qd=12.4-4P?

Managerial Econ
How do you get P=12.4-4Qd to equal P=-2.6+2Qs? You have to find the equalibrium so you have to set Qd=Qs so I can't figure out how to get p in the equations and the equations to equal Qd & Qs.

Pre Algebra
7. 3132 8. 6400

ireland
how many hours do people typically work in week (in ireland)? Check this site for the length of the normal work week in Ireland. http://www.fedee.com/workinghours.shtml thanks,you have really helped me You're very welcome. I hope you enjoy your study of Ireland.

ireland
which careers are the most desired in ireland? Since 64% of Ireland's people work in service industries, these are the most desired jobs for the population. Ireland does a lot of computer and information technology.

ireland
what are the most common careers in ireland? Accordiing to the source linked below, Ireland's workforce is divided as follows. agriculture: 8% industry: 29% services: 64% (2002 est.) https://www.cia.gov/library/publications/the-world-factbook/geos/ei.html#Econ Industry ...

ireland
Is a free choice of careers in ireland or is a career chosen for each person by the goverment? Ireland has free choice of careers. Just as in most of the world, Irish people can hold any job for which they are qualified. thank you for the help You're very welcome.

Biology
an artificial surfactant.... Google it! Its the right anwser!

Microeconomics
What kinds of situations can moral hazard exist? Are there ways that the government reduces the amount of moral hazard? Thanks so much! RB This site may help you. http://en.wikipedia.org/wiki/Moral_hazard

Math
I need to solve this with the substitution method. 3x + y = 6 3x + y = 3 Is it possible or is it a typo on the worksheet? I can't figure it out! Try the following very nice site: (Broken Link Removed)

math
how do i do long division? This web site may help you. http://www.coolmath4kids.com/long-division/long-division-lesson-1.html dont listen to drbob222

Chemistry
"Find the pH of the solution obtained when 32 mL of 0.087 M ethylamine is titrated to the equivalence point with 0.15 M HCl? Do I need to do a rice table for this problem? I'm having difficulty starting this problem... Thanks!

math
how do you calculate metric surfaces? not sure what you mean. are you finding areas of surfaces that have metric units? are you converting between units of area in the metric system? give a specific example or problem.

spelling
What is the relationship between the word assignment and the following sentence? "The noble elephant marched near Goshen, Indiana," said Sam's aunt. Please rephrase and repost. Your question is not clear. Thanks. =)

Child Develpoment-- Question
Can you help with this question? As a caregiver of an infant, meaningful communication between you and the parent, gently introducing new parenting techniques, can sometimes be done lightly by which? A. "talking through the baby." B. waiting until the mother is ...

Chemistry
Hi, I would like to know if I did this problem correctly. Your help would be greatly appreciated! "Chlorine, Cl2, is produced commercially by the electrolysis of aqueous sodium chloride. The anode reaction is 2Cl-(aq)---> Cl2(g) + 2e- How long will it take to produce 2...

LORD OF THE FLIES
at the end of the novel Ralph cries. what is he crying about? I take you didn't read the book. http://www.freeonlineresearchpapers.com/lord-flies-summary-by-william-golding Check this site... it explains it carefully. See top quote. http://www.sparknotes.com/lit/flies/...

Chemistry
I am having trouble with the balancing the oxidation-reduction equations that are in a basic solution. This is the first one that I'm doing that's in a basic solution, and I can't get it! I get everything right except I get 2H2O instead of one on the left. MnO4- + ...

Chemistry
Hi, I posted yesterday with this lab question. "Calculate the molar amounts of NaOH used in the reaction with the HCl solution and with the HC2H3O2. I think I got the answer to that with the help that I received. I had 5 mL of HCl, and I was using .100 M NaOH, so I got ...

Chemistry
We did a lab for acid-base titrations, and I'm having trouble with my post lab questions because I had trouble with acid-base reactions and titrations in the first place! "Calculate the molar amounts of NaOH used in the reaction with the HCl solution and with the ...

Chemistry
Use these answers for questions 4 - 7. (A) 1s2 2s22p5 3s23p5 (B) 1s2 2s22p6 3s23p6 (C) 1s2 2s22p62d10 3s23p6 (D) 1s2 2s22p6 3s23p63d5 (E) 1s2 2s22p6 3s23p63d3 4s2 4. An impossible electronic configuration 5. The ground-state configuration for the atoms of a transition element ...

Chemistry
Use the following answers for questions 1 - 3. (A) F (B) S (C) Mg (D) Ar (E) Mn 3. Forms oxides that are common air pollutants and that yield acidic solution in water I think the answer to this one is B, but why is it B? I see how it would yield an acidic solution, but what ...

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