Total # Posts: 51
A mechanic pushes a 3090 kg car from rest to a speed of v, doing 5497 J of work in the process. During this time, the car moves 22.1 m. Find the speed v. Neglect friction between car and road. Answer in units of m/s. 1/2mv^2 doesnt work
February 12, 2017
A coin is placed 14.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 31.0 rpm (revolutions per minute) is reached, at which point the coin slides off. Part...
January 17, 2017
Satelite orbits vary in their distance from the earth. Orbits can be anywhere from 252,800 to 35,200,000 yards. What is the greatest distance between satelite orbits? Round to the nearest ten thousand to estimate. For problem 3, find the exact difference
September 5, 2013
Each day, Mr. Samms randomly chooses 2 students from his class to serve as helpers. There are 15 boys and 10 girls in the class. What is the probability that Mr. Samms will choose 2 girls to be helpers
May 16, 2012
US/ 101Week 5 DQ4
Have you ever used mnemonics to remember something complicated? If so, describe these techniques. How might you use mnemonics to be a more effective college student and adult learner?
February 11, 2012
Archimedes used density along with mass and volume of alloys (mixtures) of gold and silver to determine the percent of gold (and also silver) in these alloys by simple, non-destructive measurements. Prove that the mass of gold in a given mass of silver alloy is given by the ...
September 26, 2011
3) The evolution of the socio-political milieu during the colonial period, including Protestant Christianitys impact on colonial social life. how did it protestantism impact work ethic and how did politics evolve on the early colonial period
March 23, 2011
An underwater microphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 10 dB. Assuming a porpoise emits sound at a rate of 0.05 J/s, what will be the max distance at which the animal will still be recorded? Neglect ...
February 21, 2010
I am doing a crossword puzzle: THe cause of the Panic of 1837 was ? or too many people buying too much land with too little collateral. It starts with an O and has 15 letters?
February 4, 2010
How do you solve 5x^4-12x^3 by factoring? I tried to pull out an x^3, but x^3(5x-12) is hard to break down further into two groups. There's no factors of 5x really other than 5 and 1, and that won't work. Could you demonstrate?
October 15, 2009
(x+4)^2=18. (x+4)(x+4)-18= x^2+8x-2=0. (x )(x )I have no idea how to factor this because no factors of two will add up to 48. Can you offer an explanation and tips on factoring this sort of question?
October 15, 2009
How do you factor -2x^2+x+15=0? I know it should be (2x ) (x ) but I cannot find two other factors which will yield 15 AND x. 5 and 3 doesn't work and neither does 15 and 1. Could you explain what could?
October 15, 2009
1a. You fill a small graduated cylinder with exactly 10.00 ml of distilled water with a temperature of 20.0oC which weighs 10.00 grams. You pour out the water and put in 10.00 ml of ethanol into the same graduated cylinder which weighs 7.893 grams. What is the specific gravity...
October 6, 2009
The cost on the shipping of chemicals is dependent upon the weight of cargo upon loading. You have a choice of purchasing 9,000 gallons of ethanol from Florida or Minnesota. The temperature of the cargo leaving Minnesota is 15.0oC while the temperature of the cargo leaving ...
October 6, 2009
msg for Sra (art)
Thanks for your help. Dawn Dupree was the artist given to us. Not our choice! Mainly I have to find her works, title of each piece and date they were completed. When I have this information and written it down, I have to do my own work and version etc. I still cannot find the ...
October 3, 2008
I am doing a project on Dawn Dupree. I have to find works she has done. The title of the work and the date completed. I have tried to find this information but have had no luck. Please help, deadline for project has now been set.
October 2, 2008
y=y0+V0yt+.5Ayt^2 0=30+10t-.5(9.8)t^2 0=4.9t^(2)+10t+30 Via Quadratic Formula t=-1.656s and/or 3.6969s since t can't be negative t must equal 3.6969s x=X0+V0xt+.5Axt^2 x=0+15(3.6969)+.5(0)t^2 x=15(3.6969) x=55.5m
September 26, 2008
The total pressure in a flask containing air and ethanol at 25.7C is 878 mm Hg. The pressure of the air in the flask at 25.7C is 762 mm Hg. If the flask is immersed in a water bath at 30.0C , the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature...
February 4, 2008
I have to do an assignment on designing an animal that has adapted to life in the waters of the dead sea. But nothing can live in the dead sea so I don't know what to do. Can anyone help with suggestions? What about a micro organism? There are bacteria that can live in the...
August 21, 2007
Ra Rb Year 03 40% -30% Year 04 -24% 22 Year 05 30 42 year 06 26 46 Corrleation coefficinet= -.2374 Construct a portfolio P that contains A and B in proportions of 40% in A and 60% in B and calculate the returns on the portfolio for each of the years 03 through 06. I have no ...
June 20, 2007
i have to write a ten page paper for my technology class on a technology that was developed in the last ten years. it can not be an innovation (such as hi-def tv, or cell phones) ive tried gps, artificial hearts, the internet, but none of them worked, i need help finding a ...
November 11, 2006