# Posts by matt

Total # Posts: 2,381

social studies
i did my project on the attack on pearl harbor and it says that i have to describe how my project relates to the theme "Revoultion,Reaction and Reform" i have no clue about this question. Please help?

social studies
Why was pearl harbor described as a day of infamy?

physics
a fully loaded saturn V rocket has a mass of 2.9*10 to the power of 6 Kg. Its engine provides a thrust of 3.3*10 to the power of 7N(down). Determine its weight (force due to gravity) as it stands on a launching platform

math
Compute the compound quarterly amount after 1 year for \$100 invested at 12% interest compounded quarterly. What simple interest rate will yield the same amount in 2 years?

physics
What pressure does a 155Newton woman exert on the floor when she balances on one of her heels? Her heels have an average radius of 0.0005 m.

physics
Please Help, Two point charges are fixed on the y axis: a negative point charge q1 = -23 µC at y1 = +0.23 m and a positive point charge q2 at y2 = +0.33 m. A third point charge q = +7.8 µC is fixed at the origin. The net electrostatic force exerted on the charge q ...

math
how do you do it though? its hard

math
what problem did the dumb gangster have when the boss told him to blow up a car?

APUSH
Please check? 1. a 2.c 3. e 4. b 1. Before the civil war the south's slave labor force a. was a self reproducing population b. was generally unprofitable to the planter class c. was an inflexible labor system d. was employed exclusively in the cultivation of cotton e. was ...

math
Suppose \$15000 is invested in an account for 6 years. Find the balance in the account if interest is compounded continuously at 6%.

English
In the word ecologists, is eco the root morpheme or ology? Are the morphemes eco, log, y, ist, s or ec, ology, ist, s ? This is very confusing for me. Any explanation on how to find the root would be appreciated. It's easy to find roots on some words, but words like ...

English
requirements name the root morpheme:quire # of bound morphemes: 3 list derivational morphemes: re, ment list inflectional morphemes: s Is this correct?

calc
consider the function f(x)=x^3 - x^2 - 3x -2. find the average slope of this function on the interval (-2,3). by the mean value theorem, we know there exists a c in the open interval (-2,3) such that f'(c) is equal to this mean slope. find the two values of c in the ...

English
Is "this" an adjective or determiner if you are doing a syntax tree diagram branching out from a NP? I will surely leave this job without a penny in my pocket. Is "without" a preposition?

English
Is this sentence in past progressive tense? The freshman math classes were already behind schedule by three weeks.

Physics
Calculate the resistance of a 900 watt toaster operating at 120 volts. Which formula do you use?

math! help please wont take long
dont answer i figured it out

math! help please wont take long
find the value of K so that 3x^2-6x+k=0 has a double root answer is 3. how do you find that

College Algebra
Let U = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, A = {6, 8, 10, 12}, B = {9, 13}, and C = {6, 9, 12, 13, 14}. List all the members of each of the sets. (a) (A ¿ B) ¿ C , (b) A ¿ B ¾ C

English
important is an adjective; ratings is a noun; reasons is a noun;offers is a verb.

English
Incorrect sentence: The report considers important factors in choosing a medical facility, ratings of services at the urgent care center, reasons why HMO members do not use the center, and offers suggestions for increase in member usage. I know this has parallelism problems. I...

English
I think # 1 is weak and #3 is weak.

English
Are the verbs in these sentences passive voice, weak or past tense. My answers: 1. The book was informative but too long.--weak or past or both?? 2.The teachers have sent the book to the publisher.--past 3.The essay has been shortened by ten pages.-- past 4. This method of ...

Math
Transform the equation or inequality by completing the square. y^2+3x-6y-7=0

physics
At a given instant in time, a 4.2-kg rock is observed to be falling with an acceleration of 8.4 m/s2. To two decimal places, what is the magnitude of the force of air resistance acting upon the rock at this instant?

Chemistry
[H^+] = 2.7 x 10^-3 Calculate for [OH^-] [OH^-] = ? M

Algebra
A club with 35 members is to select five officers (president, vice president, secretary, treasurer, and historian). In how many ways can this be done?

math
number of 5c pieces --- x number of 20c pieces --- 30-x 5x + 20(30-x) = 345 Expand 5x+600−20x=345 Simplify 5x+600−20x to −15x+600 −15x+600=345 Subtract 600 from both sides −15x=345−600 Simplify 345−600 to −255 −15x=−...

physics
a force F pushes on a box of mass m that initially is at rest on a rough, horizontal surface. the force F is directed at an angle theta = 30 degreees above the horizontal. the coefficants of friction between the plane and the box are static= .30 and kinetic = .28. if F=50N and...

Math
Given two spinners one with four equal parts labeled 1,1,3,4. And one with six regions labeled 1,2,3,4,5,6. Given one spin on each spinner what is the probability of spinning two numbers with the sum of 7?

algebra
how many pounds of cashew nuts that sell for 2.00 a pund should be mixed with peanuts, which sell for 80 cents a pound to make a 10 pound mixture that sells for 1.28 a pound

algebra
a lab technician has a 15% alcohol solution. She wants to make 100 gallons of a 29% solution. How much of the 15% solution should she use?

phyisics
A 615 kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. (a) What is the acceleration of the car?

science
*conclusion

science
i have no idea what to do for my manatee onclusion. Any ideas for what to say?

science
Thanks

science
What does it mean when manatees have natural selection? i have a summary to do about manatees and one of the words i have to use is natural selection. Any help?

science
i still don't get it :/

science
If the manatees were able to make 3 adaptions to their body or way of life for their survival, what would they be? PLEASE no websites :/

science
identify onbe external feature of the manatee that allows it to live in water.

Physics
A test tube in a centrifuge is pivoted so that it swings out horizontally as the machine builds up speed. If the bottom of the tube is 145.0 mm from the central spin axis, and if the machine hits 46500 rev/min, what would be the centripetal force exerted on a giant amoeba of ...

MAth Probability
Determine the probability of each of the following types of poker hands a. Two pairs (two cards of one denomination, two cards of a different denomination, and one card of a denomination other than those two denominations) b. One pair (two cards of one denomination and three ...

Math Probability
A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent? I understand it is like the birthday problem, I just do not understand how to solve it still.

Math Probability
What is the probability that a student applied to THREE OR MORE colleges? with the chart Num. Applied Probability 1 .17 2 or less .29 3 or less .43 4 or less .59 20 or less 1

Math
A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent?

intermediate algebra
The third angle in an isosceles triangle is 1/2 as large as each of the two base angles. Find the measure of each angle.

intermediate algebra
The third angle in an isosceles triangle is 1/2 as large as each of the two base angles. Find the measure of each angle.

Physics
A 6490 kg helicopter accelerates upward at 0.59 m/s2 while lifting a 1180 kg car. (a) What is the lift force exerted by the air on the rotors? N (b) What is the tension in the cable (ignore its mass) that connects the car to the helicopter?

chemistry
thanks

chemistry
how would i set this up? chelste's diet restricts her intake of protein to 24 g per day. if she eats an 8.0 oz burger that is 15.0% protein, has she exceeded her protein limit for the day? How many ounces of a burger would be allowed for chelste?

Math: Algebra
Landon can climb a certain hill at a rate that is 2.5 mph slower than his rate coming down the hill. If it takes him 6 hours to climb the hill and 45 minutes to come down the hill, what is his rate coming down?

physics
If someone kicks a soccer ball across a flat parking lot with an initial velocity of 19.0m/s @ 19 degrees, how long will the soccer ball be in flight and how high above its launch point will the ball go? What would be the x and y components of this velocity at t=0.

trig
Prove (1+secx)/(tanx+sinx)=cscx

Trig
Solve the following trig equation 2cos(x-π/6)=1

Trig
Prove (1+secx)/(tanx+sinx)=cscx

Calculus
Consider the curve -8x^2+5xy+y^3=-149 1. Find Dy/dx 2. write an equation for the line tangent to the curve at the point (4,-1)

math
The day started out at 16 F and ended at 25 F. Find the percent change for the temperature throughout the day?

anatomy
I have tried to search this and I can't find anything on this. Can you please help?? Name the structures that can be seen in the elastic cartilage?

chemistry
how much ice would i have to eat to l lose 10% of my body weight?

phyics 2
Remarks The gravitational force between the charged constituents of the atom is negligible compared with the electric force between them. The electric force is so strong, however, that any net charge on an object quickly attracts nearby opposite charges, neutralizing the ...

Economics
4. Which of the following statements are positive in nature and which are normative? a. A tax cut will raise interest rates. I think it is Normative Economics

math
Jason bought a laser printer that regularly sells for \$ 649.99AT THE MARKDOWN RATE OF 35%.What is the final selling price

Excel
The correct answer is A - Styles gallery.

math

chemistry
Balance the equation NH3 + O2 −→ N2 + H2O Given 4.55 mol of the reactant NH3, determine the corresponding amount of O2.

Physics
A 145 m long ramp is to be built for a ski jump. If a skier starting from rest at the top is to have a speed no faster than 22 m/s at the bottom, what should be the maximum angle of inclination?

Physics
It takes 0.220 s for a dropped object to pass a window that is 1.14 m tall. From what height above the top of the window was the object released?

Biology
What is the difference between thromboplasin and factor Xa? I have in my notes that they both convert prothrombin to thrombin.

Algebra
Solve: squareroot 2x-1 - squareroot x+3 = 1 please show steps

Algebra
Solve (x-1)^2 = 16 please show steps

alg II
linear functions if g(fx) = 2x+6 f(gx) is a line through origin what is f(g2011)

ALGEBRA
Solve (x-1)^2 = 16 show steps

Algebra-HELP
Solve: squareroot 2x-1 - squareroot x+3 = 1 show steps

Physics
A bathtub of icy water at 32 degrees farenheit holds 17 gallons. You put in a 25 pound watermelon with a temperature of 100 degrees farenheit. If you wrap the tub completely in blankets so it does not lose any heat, what will be the final temperature of the watermelon? (...

Physics
80*1kg?

Humanities
Why does a teacher needs to have a grasp of students social setting and the condition in which they live?

accounting
What is the acid test ratio? Is it the same thing as the quick ratio?

Math
Bond : Face Value = 100,000 State Rate = 9% Semi-annual Payments Term = 3years Market Rate of 12% Amortize the bond to determine: Year 1 Interest Expense End of Year 1 carrying value. My Answers: Year 1 Interest Expense = 5,621.05 End of Year 1 carrying value =94,805.14 Am I ...

algebra
3x-y=25 x+4y=-22 3x-y=25 -3x-12y=66 -13y=91 y=-7 x+4(-7)=-22 x=6

Physics
Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the speed of a 103-kg ...

physics
A 2.9 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.0 with the horizontal. An average frictional force of 4.2×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.6 m...

Math
Reduce the fraction to simplest form 2x+2/6x^2+16x+10 (the 6x is squared I think that's how you show it)

math
the third and fourth terms of the sequence are 21 and 38. If the second differences are a constant 2, what are the first five terms of the sequence?

Chem
Oh, alright. I'm sorry then. XD

Chem
Why wont you answer my previous q Dr. Bob? D:

chemistry-help!
The initial rate of reaction for H2O2(aq) <-> H2O (l) 1/2 O2 (g) is found to be 1.7x10(-3)M/s. Assume that this rate holds for 2 minutes. Start with 160ml of 1.60 M H2O2. How many milliliters of O2 measured at 24C and 760mmHg , are released from solution in the first ...

Chem-Repost
it wouldn't let me post after putting spaces in the url and everything, so i just copied and pasted the q instead :P sorry for all the messyness. i'll see if i can delete q's, in the mean time you can maybe look at this please? Initial rate of rxn of H2O2(aq)->...

Math
7/8 is about 1, 3 1/4 is about 3, 1+3=4? And follow the same pattern for th rest. That's how i would estimate it :s And an example for division is 9 5/6 is about 10, 2 1/8 is about 2, 10 / 2 = 5. Hopes this helps

Chemistry
Using grammatically correct English sentences describe how the nature of the bonding in MgF2 (s) and Zn(s) differ. (Don't just name the different types of bonding-describe how they are different. Which of the following are metallic? F2(g), Co(s), NaCl(s), H2O(s), C6H6(l) (...

physics
A 83-kg worker clings to a lightweight rope going over a lightweight, low-friction pulley. The other end of the rope is connected to a 66-kg barrel of bricks. If the worker is initially at rest 16 m above the ground, how fast will he or she be moving when he or she hits the ...

Chemistry
It doesnt let me link stuff :c But its the chemsitry toughhh q And i hope you are not typing the answer while i post this XD (sorry if that's the case) Thanks again

Chemistry
I just wanted to clarify that although Cody did respond to my question, we were still unable to determine the solution. I will post a link to the question in a minute. (i noticed you replied to the other posts a bit ago, but i hope im not being too abrupt. Just verifying :P)

physics
im guessing PE is potential energy eqn is PE=mgh 20N is weight of cat, which is equal to Fg, which really is Fg=mg so simply mgh=20x5=100. The cat's kinetic energy is = .5mv(2) (the two is a superscript, meaning the v is squared) Regardless it's velocity is = to 0 when...

Physics
m1v1=m2v2 You have mass and velocity of car (lets designate that m1 and v1) and mass of ball (lets say that's m2). Solve for v2.

Physics
Its another momentum problem similar to your other post. Since there is only two 'fragments' from the 'explosion' :P you can disregard the angle for the velocity and act like they are horizantal to each other. If you don't want to disregard the angle, then ...

Physics
Use the eqn: v1'=v1*(m1-m2)/(m1+m2) M2=neutral car, its v2=0 since its at rest. m1=truck, v1=11.5. Then, once you have v1' you can sub it into m1v1+m2v2=m1v1'+m2v2' and find v2'. The first eqn is a special eqn only to be used when v2=0 and the collision is ...

physics emergerncyy!
use the eqn v2'=v1(2*m1/(m1+m2)) This eqn is specially derived fro elastic collisions where v2=0. The speeds should be components; north, south, east, west or up, down, leftm, right etc. Anyways, find the components and then use pythagorean theroem. (once you have v1, you ...

chemistry_toughhhh
No it's balanced. you're allowed to have fractions in the equation. Uncommon yes, but not impossible. Nice try though :P

chemistry_toughhhh
Initial rate of rxn of H2O2(aq)->H2O+ 1/2 O2(g) is found at 1.7x10(-3)M/s and is constant for 2min. You start with 160ml of 16M H2O2. How many mL of O2 in one minute? (Measured at 273K and 760mmHg). I tried to find the new conc of H2O2 via NewConc= Old conc - kt Then i ...

algebra
A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. 35 said they drove alone. 38 rode in a carpool. 33 rode public transportation. 5 used both carpools and public transportation. 4 used both a carpool and sometimes ...

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