Monday
August 31, 2015

Posts by Phil


Total # Posts: 259

Physics
QUESTION: A 200 N/m, 5 m spring on a 20 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline will the block travel? How fast will it be traveling when it is 0.2 m up the incline? EQUATION: 1/2kx^2 + mgh + 1/2mv^2...
January 13, 2009

bio
Hi. i know I already posted this but I don't understand how polyploidy contributes to evolution in finches of the galapagos islands as polyploidy most often occurs in plants.
January 12, 2009

biology
How does geographic isolation contribute to evolution thank you
January 12, 2009

bio essay
i need help explaining the geographic isolation part
January 12, 2009

bio essay
Hi. I need more help with this question. On the archipelago of the Galapagos Islands, which most geologists believe to be of volcanic origin without ever having had any land connection with the west coast of South America, Darwin discovered a group of small finches. These ...
January 12, 2009

bio
On the archipelago of the Galapagos Islands, which most geologists believe to be of volcanic origin without ever having had any land connection with the west coast of South America, Darwin discovered a group of small finches. These birds have since been classified into more ...
January 12, 2009

us history
hi. can someone please help me find some good quotes that justify american imperalism in the late 1800s and early 1900s thank you
January 11, 2009

Physics
In my last post, I'm confused how drwls got P2/P1 = 14.8
January 8, 2009

Physics
A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of seawater is 1025 kg/m^3...
January 8, 2009

Physics also
A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of seawater is 1025 kg/m^3...
January 7, 2009

Physics - Submerged Cylinder
A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of seawater is 1025 kg/m^3...
January 7, 2009

bio
this is for recombinant dna
January 4, 2009

bio
Describe how the Expression of the gene of interest could be ensured
January 4, 2009

english
what names signify the meaning betrayal
December 21, 2008

Physics
This question has me very lost. Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 11 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 50 cm. What ...
November 29, 2008

math
30 days later. this is like least common multiples... 2, 5, 15. the least common multiple is 30.
November 10, 2008

Chemistry
What is the effect on the boiling point of a solution (for example, water) produced by a soluble nonvolatile substance (for example, sodium chloride)? What is the effect of an insoluble substance such as sand or charcoal? I believe if an insoluble substance is added, then the ...
November 10, 2008

history
Hi can someone help me with this question By 1828 John C. Calhoun was a. an avowed secessionist b. an out and out sectionist c. a flaming nationalist d. both a sectionist and nationalist I think it is A
November 9, 2008

history
so it wouldn't that make A wrong
November 9, 2008

history
but he didn't cause the panic
November 9, 2008

history
hi can someone help me with this question 1. President Van Buren is best remembered for a. causing a panic b. establishing the independent treasury system c. ending the bank of the united states d. annexing texas I think it is A but can't it also be B thank you for your help
November 9, 2008

history -- Correction
oh ok well thank you so much for all your help
November 9, 2008

history
it says that jackson said that it engaged in corruption so wouldn't it make a wrong. The other two choices for the question were c. was partly foreign owned d. issued unsound currency but i thought both those were wrong. I still don't get why it is A
November 9, 2008

history
so 3 is a. but why is it A
November 9, 2008

history
hi can someone please help me with these 5 questions. 1. One manifestation of the rising democratic tide in the 1830s was a. a general raising of the political tone b. use of national nominating conventions I think it's a but i don't know why it can't be B 2. the ...
November 9, 2008

social studies
hi can someone please help me with these 3 questions. 1. One manifestation of the rising democratic tide in the 1830s was a. a general raising of the political tone b. use of national nominating conventions I think it's a but i don't know why it can't be B 2. the ...
November 9, 2008

math
can someone help me with this question. I am completely stuck. A box with a quare base and top has a volume of 20 meters cubed. The material for the base costs $7.00 per sq. meter, the material for the sides costs $4.00 per sq. meter, and the material for the top costs $2.00 ...
November 9, 2008

math
the diameter of a cylinder is one half the height. Express the total surface area as a function of the height h. Can someone please help me with this question
November 9, 2008

Literary Terms
What is the difference between Juxtaposition and Antithesis?
October 27, 2008

History
How did John Adams help establish a stable government after the constitution? Like I know he almost put us in the Quasi-War and threatened civil rights with the Alien & Sedition Acts, but how did he HELP establish a stable gov't?
October 19, 2008

Algebra
A rectangle is 5 times longer then it is wide. If perimeter of the rectangle is 222m. What are its dimensions
October 12, 2008

American History
That's it! Thanks!
October 11, 2008

American History
That was in 1795, this treaty Im talking about during the articles of confederation 1781 - 1789. It was one of the reasons why government under the Articles was weak, and it had to do with sectionalism.
October 11, 2008

American History
What was the name of the treaty that NE negotiated with Spain shortly after the American Revolution that would increase American trade in NE, but gave Spain control of the Port of New Orleans, Screwing over the South West. This was an example of sectionalism, but I forget the ...
October 11, 2008

math
Three of these puzzles have more than one answer. Try to find all the possible answers for each puzzle. One of these puzzles is impossible. 1.My number is a factor of 20.It's also a factor of 30. 2.My number is a multiple of 10.It's also a factor 45. 3.My number is ...
September 11, 2008

math
three of these puzzles have more than one answer. try to find all the possible answers for each puzzle one of these puzzle is impossible. 1.my number is a factor of 20. it's also a factor of 30. 2. my number is a multiple of 10. it's a factor of 45. 3. my number is ...
September 11, 2008

Chemistry
Why isn't hydrochloric acid used to both dissolve and precipitate silver?
September 11, 2008

math ( factors)
what is the factors of 64?
September 8, 2008

accounting
Trippel's course is hard!
June 11, 2008

English
You're right. Please help with reconstructing my new thesis statement. I want to make it short, but strong, supporting dress codes in schools. "Even though enforcing dress codes in schools infringes upon students rights, dress codes should be enforced in schools ...
May 20, 2008

English
My thesis statement has to be objective (supporting both sides) as my essay has to be objective too. That's why I'm having trouble with it. Thanks
May 20, 2008

english
While wearing uniforms does not necessarily guarantee academic success; not wearing uniforms deters students from concentrating on their studies, dress codes can have a positive and negative effect on students. The statement above is my thesis statement on dress codes in ...
May 20, 2008

peer reviewing essay
The social studies curriculum of schools around the nation emphasizes a combination of different topics that usually pertain to skills necessary for the future. In comparison, it is only for a few years that I can observe the history of the U.S. formally. In my case, I may ...
May 10, 2008

peer reviewing essay
Hi, I have two assignments I have to submit to my AP US History teacher for next year by June 2nd. The first part is to explain why I should be in the class in a one page essay with size 11 font and 1.5 spacing. Could someone please read through my essay and see if it's ok...
May 10, 2008

chemistry
The soda was dry, the concentrations were the same, we did not measure volume of gas produced, yes it was the time to stop fizzing, which is what we timed
May 3, 2008

chemistry
In my last lab, we timed how fast hydrochloric acid, acetic acid, and water react with baking soda. Our results showed that water did not react, acetic acid did it in 40 seconds, and HCL was 105 seconds. I do not know whether our data is wrong or not.
May 3, 2008

chemistry
Why does it take longer for strong acids to react than weak acids?
May 3, 2008

English
6a. I lay my book on the table, but now I cannot find it. 6b. I laid my book on the table, but now I cannot find it. I chose B. could you please explain?
April 28, 2008

social studies
what would be a good catch phrase for the The Girondists during the French Revolution
January 1, 2008

Calculus
Can't i figure out if its increasing or decreasing using the first derivative test? What is the point of the second derivative test?
November 14, 2007

Calculus
I have the equation: cos x - x = f(x) I am told to find the relative extrema. I am also told to use the Second Derivative Test where applicable. My question is how do I solve this problem, and how do I know when to use the Second Deriv test? Thanks!
November 14, 2007

chemistry - titration
Show that for the titration of a weak acid, HA, with NaOH solution, at half-titer, pH = pKa. Please explain your answer. Thank you. HA + NaOH ==> NaA + HOH Ka for HA = (H^+)(A^-)/(HA) and solve for H^+. (H^+) = Ka*[(HA)/(A^-) When HA is half neutralized, an equal amount of ...
August 5, 2007

social
What are some examples were the u.s has relied on international organizations.. Wat were some situations were the policy was being used? Check United Nations, SEATO, NATO. Here is a good source to begin with. http://en.wikipedia.org/wiki/International_organization
June 18, 2007

social
Explain the turmoil of Latin american countries, whos involved and whats the consequences of their actions. Also what has changed throughout the year and what has stayed the same....thanks for any help :) Thank you for using the Jiskha Homework Help Forum. To get the clearest ...
June 11, 2007

english
poem is to ________ as novel is to chapter Stanza? or couplet or line ?? or verse sonnet?
May 21, 2007

U.s.history
How did womens experiences in civil rights and antiwar protests increase their awareness of sexism? A feeling of equality. I think they were aware of sexism well before the civil rights movement. For example, during World War II in the United States, women were needed to serve...
May 7, 2007

Us history
What happened at the demonstrations in albany,georgia and birmingham and talk about the role of young people...i dont rly want an answer talking bout all 3 but like a summary of them thanks Check out these sites for information about the protests in Albany and Birmingham. http...
April 26, 2007

CHemistry
im not sure how u solve these types of problems... How many moles of NaOH are contained in 200ml of a 0.1M of NaOH? How many grams of NaOH are contained in 500ml of a .5M solution of NaOH? <<How many moles of NaOH are contained in 200ml of a 0.1M of NaOH? >> A 0.1 ...
April 21, 2007

Chemistry
i was wondering which ones are soluble in water and what ones are not: K2CrO4, CaS, Na2S, and BaSO4 I was also wondering if AgBr and CaCO3 are soluble as well. BaSO4, AgBr and CaCO3 are insoluble. The others are soluble. I can give you a web site that gives some simple rules ...
April 19, 2007

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