Assume that a particular reaction evolves 230 kJ of heat and that 28 kJ of PV work is gained by the system. What are the values of delta E and delta H for the system? For the surroundings?
December 6, 2012
A hot air balloon is rising vertically. From a point on level ground 125 ft. from a point on ground level directly under the balloon the angle of elevation of the balloon changes from 19.2 to 31.7. How far does the balloon rise during this period? Draw a diagram when answering...
November 29, 2012
In an experiment, BEtsy dissolves 18 grams of powdered dye in 100 grams of pure water. The colored water is then heated on a hot plate, whenthe colored water evaporates completely, how much dye will be left?
February 16, 2011
supose that (f(x+h)-f(x))/h=3x^2-6h+5 and f(1)=8. ind the equation of the tangent line to the graph of y=f(x) at x=1. if we write this equation in the form y=mx+b then m=? and b=?
September 30, 2010
a box with mass 20kg rests on a frictionless ramp with a 15degree slope. a mover pulls up on a rope attached to the box to pull it up the incline. if the rope makes a 40 degree angle with the horizontal, what's the smallest force that the mover will have to exert to move ...
November 11, 2009
What is a form of payment that orders the issuing agency to pay the amount printed on the form to another party? And what is the type of check that a bank draws on its own in-house funds? Thank you!!
March 9, 2009
Early Childhood Ed.
Careful teacher supervision and the establishment of rules are keys to preventing the chances of unintentional injuries during indoor and outdoor play. What is the most important quality of a good free-play supervisor? 1. Someone who knows when and how to intervene in settling...
April 11, 2007
Early Childhod Ed.
where can I find a good wesite to help me with a lesson plan for kindergarteners on growing? Thank you for using the Jiskha Homework Help Forum. Hopefully at least one of the following sites will help you: 1. http://www.cloudnet.com/~edrbsass/edsci.htm 2. http://www.oakland....
April 9, 2007
Writing lesson plans
I have to prepare a lesson plan on a health unit "What Makes Our Bodies Grow" for a class size of 15 kindergarteners. Any ideas would be welcome. Does anyone know of websites that can help? Thanks! you could go to the library and maybe get some kid book that you ...
March 27, 2007
Develoing a Lesson Plan
I have to develop a lesson plan for a health unit on "What Makes Us Grow" based on a class size of 15 children. I have to include objectives, the time required, materials needed, learning activities, measures for evaluation, and any teacher resource information. Does...
March 16, 2007
I need help with this question. All of the following elements are enemies of coherence,except which one? 1. misplaced modifiers 2. unclear antecedents 3. placing sentences in the most understandable order 4. lack of transistional words and phrases Which answer has no negative ...
November 30, 2006