Posts by PHIL

Total # Posts: 297

Physics
Now I'm confused. Why does changing the direction of a force double it? I'm also confused about whether the tension is a reaction to the weight of the tire and the boy or the force that the boy pulls down on the rope with. Also if the force in the free body diagram of ...

Physics
Ok, I think I got it. Are these free body diagrams correct? (ignore the dots) TIRE+BOY: T F |.| .| W FREE END: .T .| .| .F SYSTEM: .F .| .| .T.....(This tension is down) T.F....(This tension is up) |.| .| .W CANCELING TENSIONS: 2F | | W 2F=W so F=(1/2)W

Physics
A boy sits in a tire that is attached to a rope that passes over a pulley fastened to the ceiling and then passes back down to the boy's hands. The weight of the boy plus the tire is W. The force with which the boy must pull on the free end of the rope to support his ...

probability
how many ways can the 5people be arranged in a row if the father is on the far right?

Physics
Hi maybe someone can help me out, since my teacher isn't available today and this is due tonight :D. Find the heat that flows in 1.0 s through a lead brick 17 cm long if the temperature difference between the ends of the brick is 9.5 C. The cross-sectional area of the ...

Physics
I'm not sure how to do the last problem in this pdf: h t t p : / / t i n y u r l . c o m / y 9 q f 4 7 4 Any help would be appreciated. Thank you!

macroecon
If the MPC equals.7 and the MPI equals .1 then the varible net export spending multiplier equals?

french
we have been given a text and have to find words in it. we have to find the word bothers/upsets all i know is that it begins wit 'in' could it be indispose as it is the only word beginning with it we also have to find (here)encounter an it begins with 'conn' ...

Physics
How would someone calculate the average velocity of something from a velocity vs. time graph?

Physics
Ok so I got the first and last parts correct from what i did, but the second part is still messing me up. Do i enter 1/2 the time i calculated in the first question?

MICROBIOLOGY
WHICH IS /ARE COMPLEMENTARY TO 5' AGGCUAAC 3' 1. 5'TCCGATTG3' 2. 3'TCCGATTC5' 3. 5'CTTAGCCT3' 4.3'TAAGCTTA5' 5. 3'TCCGATTG5' AND 5'GTTAGCCT3'

MICROBIOLOGY
WHICH IS A RNA MOLECULE AGCCTAC GGGCCCA GCCCUUA

social life
What aspects of social life do you expect not to undergo substantial change prior to the middle of the 21st century?

MBA Econ
Well why didn't he just sell the scrap wood? It's not economically efficient if he throws out something he could sell. And yes, of course it depends how much it cost those managers and workers in time to save the \$7000 and what else could they have been working on.

Calc
i found x value of P how do I find the y value of P?

Calc
Find the point on the line 2 x + 7 y + 4 =0 which is closest to the point ( 0, 1 )

Math
Let xy = 5 and { dy }/{ dt } = 3. Find { dx }/{ dt } when x = 1.

chemistry
A researcher found that 11.56 g of lead sulfide, PbS, were formed when each of the following occurred: 10.0 g of lead reacted with 1.56 g of sulfur 10.0 g of lead reacted with 3.00 g of sulfur 18.0 g of lead reacted with 1.56 g of sulfur Explain these observations in terms of ...

algebra
7300@7% COMPOUNDED SEMIANNUALLY FOR 3 YRS

english
thank you. I read the night thoreau went to jail but I am still a little iffy on the whole personal witness thing

english
Hi can someone pelase help me explain this quote by Martin Luther King. In addition I also I need to know what the words "personal witness" in the quote mean. Thank you for all your help. "I became convinced that noncooperation with evil is as much a moral ...

physics
A standing is generated by two waves which have a velocity of 20 m/s, and go through 10 cycles in 2 seconds. How far is it from the 2nd node to the 7th node of standing wave?

physics
A standing is generated by two waves which have a velocity of 20 m/s, and go through 10 cycles in 2 seconds. How far is it from the 2nd node to the 7th node of standing wave?

physics
show that for a pendulum to oscillate at the same frequency as an object on a spring, the pendulum's length must be L=mg/k thank you

history
why is 1 B didn't they rebel because the us refused to give the filipinos their indepdence

history

history
1. The Filipino insurrection led by the Aquinaldo was the result of a. the senate vote ratyfing the treaty of paris ending the spanish american war b. the extension of american military occupation of manila to the entire archipelago 2. The american fighting during the spanish ...

us history
In its initial dealings with Colombia over the Panama Canal, the United States proposed all of the following except a) a six-mile-wide zone; b) a ten-year, non-renewable lease that would then turn control of the canal over to Colombia; c) a yearly payment of \$250,000; d) a ...

us history
In its initial dealings with Colombia over the Panama Canal, the United States proposed all of the following except a) a six-mile-wide zone; b) a ten-year, non-renewable lease that would then turn control of the canal over to Colombia; c) a yearly payment of \$250,000; d) a ...

us history
sorry i think is C

us history
Of the following, the individual who had the least enthusiasm for U.S. imperialistic adventures as the nineteenth century ended was a.TheodoreRoosevelt b. Alfred Thayer Mahan c.GroverCleveland d. William McKinley I think it is D

us history
Of the following, the individual who had the least enthusiasm for U.S. imperialistic adventures as the nineteenth century ended was a.TheodoreRoosevelt b. Alfred Thayer Mahan c.GroverCleveland d. William McKinley I think it is D

us history
The Insular Cases stated that a.island territories do not have the full benefit of the American Constitution. b.the Constitution does not necessarily follow the flag. c.the Constitution does follow the flag. d.none of the above were true. I think it is B

Still Physics...
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?

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...

history
What positive impacts has US Imperialism had on the nations that the US had colonized

history
do you know any agruments that i can use against anti imperialists

history
Hi i need help explaining how one of the main reasons behind early united states imperialism was spreading democracy. I can't find anything. Please help.

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...

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.

biology
How does geographic isolation contribute to evolution thank you

bio essay
i need help explaining the geographic isolation part

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 ...

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 ...

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

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

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...

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...

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...

bio
this is for recombinant dna

bio
Describe how the Expression of the gene of interest could be ensured

english
what names signify the meaning betrayal

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 ...

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

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 ...

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

history
so it wouldn't that make A wrong

history
but he didn't cause the panic

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

history -- Correction
oh ok well thank you so much for all your help

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

history
so 3 is a. but why is it A

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 ...

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 ...

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 ...

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

Literary Terms
What is the difference between Juxtaposition and Antithesis?

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?

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

American History
That's it! Thanks!

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.

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 ...

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 ...

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 ...

Chemistry
Why isn't hydrochloric acid used to both dissolve and precipitate silver?

math ( factors)
what is the factors of 64?

accounting
Trippel's course is hard!

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 ...

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

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 ...

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 ...

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...

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

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.

chemistry
Why does it take longer for strong acids to react than weak acids?

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?

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

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?

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!

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 ...

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

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 ...

english
poem is to ________ as novel is to chapter Stanza? or couplet or line ?? or verse sonnet?

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...

Us history
What happened at the demonstrations in albany,georgia and birmingham and talk about the role of young people...i don't 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...

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 ...

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 ...

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