Total # Posts: 1,506
PHYSICS : )
A flight attendant pulls her 69.1 N flight bag a distance of 280 m along a level airport floor at a constant velocity. The force she exerts is 32.7 N at an angle of 50.2◦ above the horizontal. Find the work done by the force of friction on the flight bag. Answer in units...
October 18, 2008
Two the Prada (Italy) and Orcale (USA) are competing for a spot in the upcomings Americas cup. They race over a part of the course several times. Below are the sample times in minutes. At 0.05 significance level can we conclude that there is a difference in their mean ...
September 29, 2008
ok but im just wondering how the first part is contradictory? are you saying to erase the whole thing...im really stressing out and im all confused what to write now that you said that..:(
September 28, 2008
How is that contradicting myself..im saying that i worked hard to make my situation easier...anyways im trying to motivate people that getting an education is important and my core message is high school is a journey.
September 28, 2008
Assuming the volumes are additive, what is the [Cl-]solution obtained by mixing 210mL of 0.600M KCl and 630ml of 0.385M MgCl2 ? Responses chemistry - bobpursley, Friday, September 19, 2008 at 4:20pm You have to assume each chloride is soluble. How many Cl in each? Add the Cl, ...
September 20, 2008
ok the molar mass of C6H1206 IS 6(12.01)+ 12(1.008)+ 6(16.00) = 180.16 THEN FIND THE MOLE n=m/M = 12.6/180.16 = 0.0699 so the number of 0 atoms is 6 x 0.0699 = 0.4194 I dont know what next
September 20, 2008
1. |-5 1/4 - 2/3| |-5 3/12 - 8/12| I forgot how to subtract fractions like the one above, can anyone refresh my memory? 2. Q bisects segment PR, PQ = 3y, and PR = 42. Find y and QR. Don't know how to do this. Explain to me please?
September 10, 2008
Kelly purchased ten shares of Gentech stock for $200 in year 1 and sold all the shares in year 2 for $220 a share. Between year 1 and year 2, the price level increased by 5%. The tax on capital gains is 50%. If the capital gains tax is on nominal gains, calculate how much tax ...
May 20, 2008
science and politics
Should affected nations from global warming , be legally entitled to financial assistance from those who did cause them and who have benefied from them? explain if they should or shouldnt contribute
May 7, 2008
science an politics
adverse consequences-flood,drought, food shortage, rising sea levels, deforestation....is there anything within the Universal Declaration of Human Rights we can use to protect people who hasnt done anything to cause global warming?
May 5, 2008
science & politics
adverse consequences-flood,drought, food shortage, rising sea levels, deforestation....is there anything within the UDHR we can use to protect people who hasnt done anything to cause global warming?
May 1, 2008
science & politics
does anywhere in the universal declaration of human rights provide any protection against such adverse consequences for human populations, especially for those who did not cause those consequences and have not benefited from global warming/global climate change? please explain
May 1, 2008
Advertising is an important aspect of the business world. a. which business environment is it especially important and explain why? b. does advertising increase or decrease the cost and therefore the price of the product to the consumer? Provide one argument
April 15, 2008
If the rental fee on a land line phone is $45 per month and $0 per month for a cell, and the cell cost 85 cents a minute and the land line cost 15 cents a minute, with calls for one month on both phones totaling 1 hr and 5 mins,show how the land line phone cost less than using...
April 9, 2008
Hi there, ok, my question stated "Use information from acid/base table and the value of Kw t ocalulate the base ionization constant, Kb, of the following bases: a)hypochlorite ion b) nitrite ion c) benzoate ion I looked at my acid/base table but it only gives values for ...
April 8, 2008
1. You have characterized two distinct genetically inheritable traits. They are inherited together most of the time, but not always and sometimes their phenotypes disappear altogether, only to reemerge in later generations. Try to explain how this type of behavior occurs to ...
April 7, 2008
I need to write a Java program using an input file with the below data. I dont even know where to begin. I have written others but this one has me totally confused. I know how to do it using math WL% = Wins / (Wins + Losses) I also wrote this to use but, cant ...
April 5, 2008
I have to explain why there was such a delay for the enforcement of both documents. I've been trying to find websites to help me, but I haven't found anything. The answer I see is The basic reason is that most nations don't want international agreements to intefere...
March 25, 2008
I have to plan a route from my hometown to Miami, FL. Gas has to be purchased within 2 miles of starting point, 20 gallon gas tank - 18 miles to a gallon. Round trip completed within 48 hours. I do not know the steps to complete this assignment. I only know how to start point ...
March 17, 2008
I need help interpreting a paragraph in the federalist papers. It is Federalist No. 10 the paragraph is. "It is in vain to say, that enlightened statesmen will be able to adjust these clashing interests, and render them all subservient to the public good. Enlightened ...
February 6, 2008
If I'm graphing a PAE equation to determine the output gap and what type, say my Y is less than Y*. Am I correct in thinking the output gap will be a negative number, which would contractionary?
November 15, 2007
from a supply/demand side, I assume that the supply of savings would move inward if the gov lower taxes on profit resulting in an increase in the deficit. Am I correct in my thinking?
October 25, 2007
The conversion of molecule S to product P has a Keq = 2.0. Two different, but related enzymes, A and B, can catalyze the reaction. The product P serves as an allosteric inhibitor of enzyme B, but not of enzyme A. A. 10 mM S is placed into three separate test tubes containing, ...
October 15, 2007
White light strikes a grating with 1300 lines/cm at normal incidence. How many complete visible spectra will be formed on either side of the central maximum? (Take the range of visible wavelengths to be 400 - 700 nm.) I used the equation d sintheta = m wavelength: (1/1300cm)(...
August 20, 2007
A charge of +24.3 µC is located at (4.40 m, 6.02 m) , and a charge of -13.1 µC is located at (-4.50 m, 6.75 m) . What charge must be located at (2.23 m, -3.01 m) if the electric potential is to be zero at the origin? ANyone have any advice? Find the distances to ...
July 9, 2007
Can someone tell me why 1968 could be considered a tumultuous year? I can think of the assassinations of Robert F. Kennedy and Martin Luther King Jr. Is there anything else? Thank you very much. Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1...
June 20, 2007
A tuning fork of frequency 558 Hz is placed near the top of the pipe shown in the Figure. The water level is lowered so that the length L slowly increases from an initial value of 20.0 cm. Determine the next two values of L that correspond to resonant modes. (Assume that the ...
June 18, 2007
Hi. I am taking a computer programming class (C++). I need some help on some programs. I tried going to my teacher - he was of no help and there are no tutors. I have a lot of code, but I'm having problems. I looked online for help, but they're using different methods ...
May 21, 2007
Hyperbola's vertics? and parabola's orientation
y^2= 9(x^2)+20x+3 how to identify its orientation and the locaation of its vertices? sqrt(x^4+8x^3)=sqrt(9x^2+20x+3) How to identify the parabola's orientation? up or down? thank you
May 21, 2007
complete the square
the quartic equation x^4+8x^3=9x^2+20x+3 how to complete the square on the left hand side? I tried to factor out an x^2 first http://mathworld.wolfram.com/QuarticEquation.html
May 21, 2007
A 3 kg ball with an initial velocity = (4.00i + 3.00j)m/s collides with a wall and rebound with a final velocity = (-4.00i + 3.00j)m/s. The ball is in contact with the wall for delta t =2.00E-3s. (specify answers with unit vectors) a) what is the change in the ball's ...
April 3, 2007
what's the difference between inexhaustible resources and renewable resources. HELP charges come together (7 letters) attract renewable resources are those that can be "renewed" as in we use trees for the wood but we can replant trees and regrow wood to use in ...
March 25, 2007
what does this quote mean To write it, it took three months, to conceive it took three minutes; to collect the data in it- all my life. I guess collecting data can be very time consuming. He is writing about his life experiences, and that would take an entire life time.
March 15, 2007
Gas Laws and Energy
I have another question. I've tried it and i keep getting it wrong. The average kinetic energy of a 1.85-g sample of argon gas in a 3.00-L bulb is 1.28e-22 J/atom. What is the pressure of the gas? What is the root mean square velocity of the argon atoms under these ...
March 2, 2007
Chemistry - Gas Laws
Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 1.00-L metal bottle that contains air at 118K and 1.0 atm pressure is sealed off. If we inject 120.0 mL of liquid helium and allow the entire system to warm to room temperature (25 °C), what is the pressure...
March 2, 2007
First, percent error can be negative, correct? Because in my lab I got -32%. Here are my questions that I need checked: 1. List possible manipulation errors that might contribute to the following errors in results: 1) obtaining a significantly larger amount of NaCl than was ...
February 13, 2007
Assume that RBCs live 100 days. How many must you make per second to keep your cell count constant? You have to have the population to do this. Assume the number of RBC in the blood is P Then the rate dying is P/100 days Then the rate of regeneration must be the same. So now, ...
January 14, 2007
Find the integrals. (show steps) (integral sign) xe^(4x^2) I think this how is how its done: (integral sign) xe^(4x^2) it's a u du problem let u=4x^2 so, du=8x dx now you have an x already so all u need is 8 inside and and 1/8 outside the integral [1/8] (integral sign) ...
December 11, 2006
find the integral secxtanxdx and if dy/dx= 2x/y^2 and y(o) = 3 then what is y(1) equal to and differentiate 2pi + 3secx secxtanxdx = Sin(x)/Cos^2(x)dx The integral is 1/Cos(x) + c dy/dx= 2x/y^2 and y(o) = 3 then what is y(1) equal to y^2 dy = 2x dx ---> 1/3 y^3 = x^2 + c y(...
December 6, 2006
What is the equation of the tangent line given the curve: y = (3+lnx)^2 at x = 1/e dy/dx = 2[3 + Ln(x))]*1/x at x = 1/e this is: 4*e y(1/e) = 4 The equation of the tangent line is thus given by: 4e(x-1/e) + 4
December 5, 2006