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
Suppose that the MPC = 0.8 and that $12 trillion of real GDP is currently being demanded. The government wants to increase real GDP demanded to $13 trillion. By how much would it have to increase government spending to achieve this goal? Can someone give me the formula for ...
September 20, 2006
What is the purpose of refluxing? Which reaction conditions are indicated with reflux? Will you apply heat? How do you know the temperature at which you should reflux? I think it is "A reflux system is used to condense vapours escaping from the hot flask. " Please ...
July 5, 2006
Compound A is a clear colorless liquid with a familiar, pleasant odor, which boils at 91-92C. A dissolves readily in water. When a solution of 5 drops of A in 1 mL of water is tested with blue and red litmus, neither test paper is seen to change color. The addition of a few ...
June 12, 2006