A heat engine operates in a Carnot cycle between 78.0°C and 340°C. It absorbs 22,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. (a) What is the mechanical power output of this engine? (answer in kW) (b) How much energy does it ...
March 10, 2015
Angela and Doreen each want to by the same comb. Angela still needs 58cents to by the comb and Doreen still needs6cents. If they were to combine their money, they still do not have enough. What is the most the comb could cost?
November 5, 2014
What is the number of double or triple bonds in the formula C3H8? What is the number of lone pairs Around each atom? And what is the number of single covalent bonds? I also need help with the formula C3H6O with the same questions! For C3H8 I got 10 single covalent bonds. And ...
October 2, 2014
Question 1 When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of ...
May 18, 2014
You are given 10 µL of a DNA stock solution that has 1.0 µg target DNA/µL. The target DNA molecule is 2.9 kb in length. Describe a set of serial dilutions that would yield a standard curve with the following concentrations: 2 x10^7 copies/µL, 2x10^6 ...
April 7, 2014
two points of charge values Q and q are placed of x and x/2 respectively from third charge of value 4q, all charges being in the same straight line. calculate the magnitude and nature of charge Q such that the net force experienced by the charge q is zero?
March 2, 2014
Can you please explain exactly the meaning. What does this poem mean and how does it relates to people decision. I need to write an essay about it. Whatever we do, whether we light strangers cigarettesit may turn out to be a detective wanting to know who is free ...
June 29, 2013
English Please help ASAP
What does this poem mean and how does it relates to people decision. I need to write an essay about it. Whatever we do, whether we light strangers cigarettesit may turn out to be a detective wanting to know who is free with a light on a lonely street nights ...
June 28, 2013
a rubber ball of mass 50g falls from a height of 10 cm and rebounds to a height of 50 cm .determine the change in the linear momentum and average force between the ball and the ground taking time of contact as 0.1 sec
June 30, 2012
we are doing this debate. i am on the history team. why is history more important than math, art (lit included), social sciences, natural sciences. and what are those subjects' flaws
February 14, 2008
I`m not catholic so I need some help. I need a quick catholic prayer. A well known one thats kinda short, I need to include it in my essay. If you could help me out that would be great.
December 18, 2007
Calculate the percent dissociation of acetic acid (Ka = 1.8 x 10-5) in a solution containing 0.00973 M CH3COOH and 0.0124 M K(CH3COO). Report your answer to 2 significant figures. Thanks!
December 1, 2007
3Ca(CH3COO)2(aq) + 2H3PO4(aq) ¨ Ca3(PO4)2(aq) + 6CH3COOH (aq) reduce in net ionic form... how do you know what to separate? for example, how would i know to separate Ca and PO4 or to keep it together??
November 25, 2007