Wednesday
April 23, 2014

Posts by PHIL


Total # Posts: 233

Algerbra
f(x)=4x^2+7x-5 and g(x)=-9x^2+3x-14

Physics - Buoyancy
A scale reads 20.3 N when an object is not submerged in water and 20.0 N when the object is (completely) submerged in water. What is the specific gravity of the object?

Chemstry
This implies that the double and triple bond are adjacent to eachother, so that would give the N an expanded octet of 10 electrons, but I thought that only happened after P?

Chemstry
What is the structure of N4O, where the 3 nitrogen bonds have different bond lengths and the N=O bond is a double bond. I just dont get it

chemistry
Am I right with my answer?

chemistry
A tragedy hits a small town. The elementary school explodes into flames trapping several classes of second graders. Because the volunteer fire department will take too long to get there, teachers and classified staff remove all the children to safety without considering the da...

sience
If it happens that a neurotransmitter binds to a receptor site and produces a negative voltage shift, the probability: that the neurons are densely connected decreases. of an excitatory response increases. that the receiving neuron will fire decreases. that the transmitting ne...

general
Neurons receive communication through dendrites which act as antennae. Transmitting these initial messages to other neurons is the function of the: cell body. synapse. cerebellum. axon. Im between A and D. Please help.

Physics
A 13 cm long animal tendon was found to stretch 3.8 mm by a force of 13 N. The tendon was approximately round with an average diameter of 9.0 mm. Calculate the elastic modulus of this tendon.

social studies
how much respect is given to older people

Physics
Estimate the work you do to mow a lawn 14m by 23m with a 0.5m-wide mower. Assume you push with a force of about 15N.

Physics
Estimate the work you do to mow a lawn 14m by 23m with a 0.5m-wide mower. Assume you push with a force of about 15N.

Physics
h t t p : / / b i t . l y / 9 S F F F o a) What is the minimum value of F needed to move the two blocks? b) If the force is 10% greater than your answer for (a), what is the acceleration of each block?

Physics
Three Coulombs of charge flow through a wire in 150 ms. If the current ceases to flow (goes to zero Amps) for the following 850 ms, what is the average current over this one-second period?

Physics
A 48V battery delivers power to a golf cart. The golf cart drives for 45 seconds while the batteries deliver 12A of current. How much energy (in Joules) is delivered during the drive?

Physics
A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (Remem...

Physics
A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (Remem...

Physics
A sprinter starts from rest in a 100-meter race, accelerates to his full running speed of 10.3 m/s in 1.15 seconds (assume constant acceleration) and continues at that speed for the rest of the race. (a) How far did he run before attaining his full speed? (b) What was his fina...

Physics
{ The subscripts are in curly brackets } A mass m is at rest on a horizontal frictionless surface at t=0. Then a constant force F{0} acts on it for a time t{0}. Suddenly, the force doubles to 2F{0} and remains constant until t=2t{0}. Determine the total distance D traveled fro...

Physics
A child on a sled reaches the bottom of a hill with a velocity of 12.0 m/s and travels 22.0 m along a horizontal straightaway to a stop. If the child and sled together have a mass of 59.0 kg, what is the magnitude of the average retarding force on the sled on the horizontal st...

Physics
Estimate the average force exerted by a shot-putter on a 6.5 kg shot if the shot is moved through a distance of 2.7 m and is released with a speed of 11 m/s.

Physics
1.) Describe the proper way to use a meter stick and why this technique is necessary (include an explanation of uncertainty). 2.) What is the difference between percent error and standard error?

chem - br bob is this right
What is the pH of a solution prepared by adding 4.000 grams of NaOH to a 50.00 mL of a buffer that is 2.00 molar both in acetic acid and sodium acetate? (Assume final volume is still 50.00 mL) * chem - DrBob222, Wednesday, April 21, 2010 at 10:52pm * chem - phil, Wednesday, Ap...

chem
i did .1 mols of AC- + .1 mols of OH gives me .2 mols of AC. the .2 mols of AC reacts with water AC- + H20---> OH- + HAC so the M is .2/.05 L = 4M to solve for the OH conc i did X^2 / 4 = 5.6 x 10^-10. and solving for the pH i get 9.675 is this right?

chem
What is the pH of a solution prepared by adding 4.000 grams of NaOH to a 50.00 mL of a buffer that is 2.00 molar both in acetic acid and sodium acetate? (Assume final volume is still 50.00 mL)

chem
I dont think this would be correct because The solution you are proposing would have a pH over 12.

chem
how many mL of .100 M of acetic acid and .100 M of NaOH, would be need to make the volume 1.0 liters and have a pH7.00 if Ka=1.8x10^-5 please write out the steps or eq for me im gettin stuck

Biology
37 is a and 38 is i think a and b

Math
Yes "A" has reflective symmetry, not rotational symmetry.

physics
The mass times the coefficient of friction

math
Two angles are complementary. THe sum of the measure of the first angle and one forth of the second angle is 58.5 dagrees. Find the measure of the angles.

math
20% of num is x. the num is 4 more than x . what's the number.

chemistry
How many Ca +2 ions in 40.08g of CaCO3 (Calcium Carbonate) I'm unsure on how to approach this problem and set it up.

accounting
Your rich godfather has offered you a choice of one of the three following alternatives: $10,000 now; $2,000 a year for eight years; or $24,000 at the end of eight years. Assuming you could earn 11 percent annually, which alternative should you choose? If you could earn 12 per...

Physics
Please respond to my previous post.

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 weigh...

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 bric...

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' co...

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 oblig...

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
can someone else please help me

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 cas...

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 cas...

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 bird...

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 th...

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 f...

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 p...

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