Friday
July 25, 2014

Posts by Nik


Total # Posts: 91

physics(URGENT!!!!!)
part d- f'=f explanation: in case of wind blowing, we'll add the speed of wind to the speed of sound (vectorially). Hence in this case it will add up. Now since the both the observer and the source are stationary, there will be no change in the frequency of sound. NOTE...

Physics Classical Mechanics
Tfixed=2*pi*((8*l^2+3*R^2)/(9*g*l))^(1/2) but i haven't yet checked my answer for Tfree.

PHYSICS
there is a problem in the last answer, at the site from where this question is from.

math
5/(w-3) Solve for w. w= I don't understand. Please help. Did I copy this incorrectly or something?

finance
2.6 / 5.63

trig
GIVEN THE ANGEL ALFA WITH COS ALFA = -1/a. IF ALFA IN QUADRANT TWO, THE VALUE OF SIN ALFA IS....

chemistry
N2O5 dissolved in CCl4 decomposes to give N2O4 and O2. The reaction is first order with a half-life of 1234 seconds. How long will it take, in seconds, for the concentration of N2O5 to fall to 1.1% of its initial value?

chemistry
The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 6.091×10−3 M−1s−1. What is the initial rate of reaction in a reactor fill...

Physics
Four forces act on a hot-air balloon, shown from the side in the figure below. Find the magnitude and direction of the resultant force on the balloon if F1 = 5050 N, F2 = 1450 N, F3 = 950 N, and F4 = 4200 N. ________° clockwise from F2

geometry
angle JKN = 56 degree

geometry
Find m angle NKL if m angle JKL = 2m angle JKN

Calc
What is lim (x -> 0) of (e^x) / x Thank you!!

statistic
hd

statistic
hd

college algebra
Find the standard form of the equation of an ellipse with center at (-2,1) with major axis length 10 along y axis and minor axis length 8 along the x axis

college algebra
find the equation of a parabola that opens to the right with given vertex: (0,3) and passes thru the point: (2,-1)

college algebra
write the equation of the hyperbola in standard form: x^2-4x-y^2+6y=9

S.S
hmm im not rly sure either :D

chemistry
32.8mL

calculus
For what values of a and b that make the function f continuous everywhere. f(x)= {x−2x2−4 if x<2 ax2−bx−18 if 2< or =x<3 10x−a+b if x> or =3

math
4.32194

math algebra
9p +2q-4(6p-2q) simplified

physics
TRIAL 1 A. ) Bag A + 6 stones Mass (kg) - 0.037 kg Mass of weight hanger + slotted weights - 210 g/ 0.21kg Tension 1 (N) - ?? Acceleration (m/s2) - ?? B. ) Bag B + 4 stones Mass (kg) - 0.08 Mass of weight hanger + slotted weights - 210 g/ 0.21kg Tension 1 (N) - ?? Acceleration...

Corporate Finance
The yield-to-maturity on a bond is the interest rate you earn on your investment if interest rates do not change. If you actually sell the bond before it matures, your realized return is known as the holding period yield. Suppose that today, you buy a 12 percent annual coupon ...

algebra
15(s-3)=12s-43 How would I go about solving this problem?

Advanced Functions
If a bacteria population doubles in 7 days, when was it half of its present population?

chemistry
According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 21.2 grams of oxygen gas with excess sulfur dioxide? sulfur dioxide (g) + oxygen (g) sulfur trioxide (g)

calculus
(1 pt) The following table gives the cost and revenue, in dollars, for different production levels, q. Answer the questions below. q 0 100 200 300 400 500 600 R(q) 0 540 1080 1620 2160 2700 3240 C(q) 650 915 985 1115 1270 1870 2605 At approximately what level of production q, ...

calculus
The graph of the function y=g(x) is given in the figure above. The x coordinate is (0,-2.) 3. Estimate the x-coordinate of the point where g''(x)=0. Round your answer to one decimal place.

calculus
Let f(x)=2.2 3x. Estimate the derivative f'(2.3) to within two decimal places by using a small enough interval.

calculus
Assume the initial investment was $6600 and the annual interest rate to be compounded continuously is 5%. Assume also that the target amount is $7900. If you want the account to contain the target amount given above after 9 years, what yearly interest rate is needed?

calculus
thanks!

calculus
solve the equation: 6P=Pe^1.1t

math
what is h(-3-h)

chemistry
how many moles of acetic acid are in 15.05mL, 45.13mL, and 75.22mL of titrated vinegar?

math
h(-3-h)

science
a current of 4a flows through a 12v headlight for 10min calculate energy transfered during this time

COM 150
Some athletes have taken drug tests to prove they are not on steroids. does this sentence contain a regular or irreagular verb, and why?

math
how many months in 7 & 1/2 years?

Geography
I love you. <3

calculus
what is the the derivative of the absolute value fuction x-3

science
sorry i put my question in the wrong place. ok my question is can you tell me if i did this correctly. my experiment was about how can you tell if the person is lying by his body language. will my independent variable be when i interview a person on a dim light while i intervi...

science
sorry i put my question in the wrong place. ok my question is can you tell me if i did this correctly. my experiment was about how can you tell if the person is lying by his body language. will my independent variable be when i interview a person on a dim light while i intervi...

science
do pupils dilate when a person lies? why? thank you!

science
can you tell me if i did this correct.my experiment is about how can you tell if someone is lying by their body language. my independent variable will be if i interview a person in a dim light while all person interview will be on regular or normal light. then my dependent var...

science
what are variables in science experiments? please give me an example like my experiment is how to tell if a person is lying by his body language.thank you. need answer badly!!!

PHI 105
Assignment: Political Campaign Ads  Due Date: Day 7 [Individual] forum  Create a political campaign ad (a poster, a flier, etc.) for two political parties: one party that supports traditional moral and political philosophies and another party that supports mode...

physics
easy method to solve questions on ap,gp,agp?????????????????????

physics
a is the rate of change of velocity.

physics - another thermo problem
thanks. i guess the dimensions in the beginning was supposed to throw me off

physics - another thermo problem
A bicycle pump is a cylinder 20 cm long and 3.0 cm in diameter. The pump contains air at 25.0 C and 1.0 atm. If the outlet at the base of the pump is blocked and the handle is pushed in very quickly, compressing the air to half its original volume, how hot does the air in the ...

physics
A 1.80 mol sample of an ideal diatomic gas at a pressure of 1.20 atm and temperature of 410 K undergoes a process in which its pressure increases linearly with temperature. The final temperature and pressure are 710 K and 1.83 atm. (Note: Volume does not stay constant). What i...

physics
An iron cube floats in a bowl of liquid mercury at 0 C. a) If the temperature is raised to 28 C, will the cube float higher or lower in the mercury? b)By what percent will the fraction of volume submerged change? Thanks

math
the problem is to use the information given to figure our who will win the third round of tugofwar. round 1 on one side are four acrobats, each of equal strength. on the other side are five neighborhood grandmas, each of equal strength. the result is dead even. round2 on one s...

math
what is the maximum amount of money you can win on the game show jeopardy in any one night? Note that the dollar amounts in each category are bigger than they used to be and don't forget the daily double and the bonus round.

science
Post your response to the following: Reflect on your own worldview and compare it with the worldviews presented in the text. Provide examples of the benefits of your view to defend your position.

ethnic
What information about race and ethnicity in the United States has helped you better understand or relate to specific minority groups? Have you learned something new about your own cultural history? Trends in immigration will continue to shape the face of the United States. Wh...

ethnic
what are the issues between the Chinese American and Japanese American [cultural] experiences? What are the differences?

ethnic
Do members of your community look like you? In what ways do they look the same or different? o How do leaders within your community treat people who are like you? How do they treat people who are different? o How do other members of your community treat people who are like you...

ethnic
Consider these questions: What are the most significant similarities between the Chinese American and Japanese American [cultural] experiences? What are the differences? (Schaefer, 2006, p. 352) • Choose from any of the following topics when considering similarities and d...

ethnics
What strategies do you use for revising a paper? How do you know when to accept feedback from another source? What makes feedback valuable to you?

ethnic
If someone made the below statements to you, how would you explain that the statements are misconceptions? Include whether you think most Americans believe these misconceptions, and why or why not. o Asian Americans and Pacific Islanders are a model minority. o Asian Americans...

help me
just finished that Assignment,you just have to look through the links they provide and then you'll have your answer.

cultural diversity
i have done this it's so easy to do, just take your time and you will get it

history
200- to 300-word summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue, and explain why you think there is a connection. Consult the National Congress of American Indians Web site, the Ind...

history
Consider the choices of Native Americans who decide to stay on their tribe's native land (reservation)and those who choose to relocate to a city. If you were presented with this decision, which would you choose and why?

history
What type of introduction and what type of conclusion do you plan to write for your research paper? How does the introduction draw readers into your argument, and how does the conclusion neatly tie up your paper?

history
Identify the different types of statistics, graphs, and illustrations that are appropriate for your topic. Where do these visuals fit most effectively into your paper? Explain how these visuals strengthen your arguments

history
how can you Create a full-sentence outline that includes effective arguments and counterarguments to support your thesis

history
Identify the thesis statement in the article AIDS in Africa: Dying by the Numbers. What strategies does the author use to formulate his argument? What makes the argument so compelling?

history
To me everyone is the same and by having someone under someone else it sure brings out a lot of problems in life

physics - oscillations
A mass m is at rest on the end of a spring of spring constant k. At t = 0 it is given an impulse J by a hammer. Write the formula for the subsequent motion in terms of m, k, J, and t. Assume x=0 at t=0. Thanks, -nik

physics - oscillations
A mass m is at rest on the end of a spring of spring constant k. At t = 0 it is given an impulse J by a hammer. Write the formula for the subsequent motion in terms of m, k, J, and t. Assume x=0 at t=0. Thanks, -nik

physics - fluids
A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 450 L/min through a 0.80cm diameter nozzle?

Physics - Fluids
A cube of side length 11.0 cm and made of unknown material floats at the surface between water and oil. The oil has a density of 810 kg/m^3. a)If the cube floats so that it is 70% in the water and 30% in the oil, what is the mass of the cube? b)What is the buoyant force on the...

Physics - Equilibrium
On a level billiards table a cue ball, initially at rest at point O on the table, is struck so that it leaves the cue stick with a center-of-mass speed v_0 and a "reverse" spin of angular speed w_0. A kinetic friction force acts on the ball as it initially skids acro...

Physics - Equilibrium
A uniform ladder of mass M and length L leans at an angle theta against a frictionless wall. If the coefficient of static friction between the ladder and the ground is U, determine a formula for the minimum angle at which the ladder will not slip.

Physics - Angular Momentum
A 230 kg beam 2.4 m in length slides broadside down the ice with a speed of 22 m/s. A 65 kg man at rest grabs one end as it goes past and hangs on as both he and the beam go spinning down the ice. Assume frictionless motion. a) How fast does the center of mass of the system mo...

Physics - Angular Momentum
Water drives a waterwheel (or turbine) of radius 3.5 m. The water enters at a speed v_1 = 7.5 m/s and exits from the waterwheel at a speed v_2 = 4.0 m/s. a) If 84 kg of water passes through per second, what is the net torque? b) If the water causes the waterwheel to make one r...

Physics
A thin rod of length L and mass M rotates about a vertical axis through its center with angular velocity w. The rod makes an angle B with the rotation axis. Determine the angular momentum of the rod.

Algebra help
Would someone help me through this one...? (-10rs^9t4/2rs^2t^7)^3

another problem for checking - algebra
P dollars is invested at annual interest rate r for 1 year. If the interest is compounded semiannually, then the polynomial P(q + r/2)^2 represents the value of the investment after 1 year. Rewrite w/o parenthesis and eval if P= $200 and r = 10% P(1 + r/2)^2 200(1 + r/0.10/2)^...

need an answer checked
The length of a rectangular swimming pool is 2x-1 meters, and the width is x + 2 meters. Write a polynomial that represents the area. Find the area if x is 5 meters. (2(5)-1) (5+2) (10-1) (9* 7) 63 My answer is 63. Do you agree?

confused
Where does the 1.8x come from? Can you break that down?

substitution
Please take me through this one problem and I think I can use this as a guide to tackle the others... Solve by the addition method, indicate if it is independent, inconsistent, or dependent x+3(y-1)=11 2(x-y)+8y=28 multiply out and get each into the form of ax + by = c. then p...

Macroeconomics
Suppose most business executives expect a slowdown in the economy. How might this situation effect the economy? What would these expectations do to inventory ordering, hiring, and making loans, or investing in new machinery?

Algebra question
When you solve a system of equations by the substitution method, how do you determine whether the system of equations is dependent? If your variables disappear as you simplify, and you end up with 0=0 (or k=k) the system is dependent. (really just the same line, one equation i...

I have the problem halfway solved
-9/7x + 8 < -4x - 5 -9/7x + 4x + 8 , -4x + 4x - 5 -9/7x + 4x +8 < -5 The book then has 19/7x + 8 < - 5 I know how to solve this but I am lacking or trying to remeber how they got 19/7 - need a refresher Convert the "x" terms to common denominators 4 x - (9/7...

Algebra word problem
In 2004, the population of Mexico was 106.5 million. If Mexico's population continues to grow at an annual rate of 1.43%, then the population in 2015 will be 106.5 (1.0143)^11 million. a. find the predicted population in 2015 to the nearest tenth of a million people. b. Wi...

science
whats da friken answer people! stop whinin and cryin and friken tell the answer insted of wasten everyones friken time! cmon! dont be gay!

PLEASE HELP!
Set acceleration to 0, since you want to keep the same speed.

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