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November 23, 2014

Posts by Maree


Total # Posts: 13

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You have received a year-end bonus of $5000. You decide to invest the money in the stock market and have narrowed your investment options down to two mutual funds. the following data represent the historical quarterly rates of return of each mutual fund for the past 20 ...
January 28, 2013

College Algebra
-(5x-3)+2x=11-4(x+2) -5x+3+2x=11-4x-8 -3x+3=3-4x (try to make "x" positive here, so add 4x to both sides of the = sign and subtract 3 from both sides as well. doing this will end you with "x=0" which is the answer. but make sure you check that the solution ...
January 28, 2013

chem
If the pH of a solution is 9, what are the hydrogen ion and hydroxide ion concentrations?
February 1, 2012

chem
tell whether .1M solutions of the following salts would be acidic, neutral, or basic: CaCl2, CuSO4, (NH4)2SO4, KClO4, KClO4, NaCN.
February 1, 2012

chemistry
From what acid and what base are the following salts made: KBr, NH4NO3, and BaCl2?
February 1, 2012

Physics
The longer a straw, the harder it is to drink from. If the air pressure is 93300 Pa, and if you could create a perfect vacuum in your mouth, what is the maximum length of a straw that you could still drink from? Density of water: 1000kg/m3. Ignore capillary effects.
November 10, 2010

physics
Frosty the Snowman was a jolly happy soul of mass 85 kg. If his initial temperature was -19C , how much heat did he absorb till he was at 25C ?
November 10, 2010

physics
During a transatlantic flight, you drink a bottle of water and tightly close its lid again. Back on the ground during taxiing to the terminal, you notice that the thin plastic bottle is crushed, and you eyeball it to be only about 70 percent of its original volume (the photo ...
November 10, 2010

Physics
In a very simple model of the lower atmosphere, air has a constant density of 1.22 kg/m3. How much would the air pressure change over a height difference of 100 m?
November 10, 2010

physics
Two identical metal plates with small holes are aligned a distance L=7.8 cm apart. They have a potential difference of 127 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters with a velocity of 4630 ...
November 5, 2010

Physics
Charge 1 is 3 C , charge 2 is 15 C , the distance between the charges is 8 cm, and they are located in a vacuum. What is the magnitude of the electric potential (zero at infinity) at position *, i.e., exactly between the two charges?
November 5, 2010

physics
In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.052910−9m when it is in the n=1 state. What is its electric potential energy?
November 5, 2010

Retorical Devices
What is the role of rhetoric in influencing people's attitudes and beliefs? Please tell us what you think, and we'll be glad to add our comments and critique. I really love this website. I just went back to college. And thank goodness fortechnology. Use these snippets ...
May 8, 2007

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