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Dan
Why are these two expressions equivalent?
(1-cos2x)(1+cos2x)^2
=
(1-cos^2(2x))(1+cos2x)
how would you notice that you can rewrite the first expression as the second while solving a problem?
3 AnswersMathematics6 years agoPredict whether the decomposition of HI is exothermic or endothermic?
How would you do this and justify your prediction?
1 AnswerChemistry7 years agoIf two chargers output the same voltage, but with different amperages, can they safely charge the same device?
I have two chargers with a 5V output. One has 550 mA and the other has 1000 mA. If a device can charge with the 1000 mA one, can it safely charge with the other? Basically, are they safely interchangeable?
I'd like an explanation as well if possible.
6 AnswersEngineering7 years agoDo ellipses need hard brackets when added to a quote?
1 AnswerQuotations7 years ago
Where can I find horse image similar to this?
I'm looking for images of horses in a similar pose. I don't want a picture of a centar, this was the only horse image I could find with the right pose.
3 AnswersPhotography7 years agoHow do I properly alter this quote?
I want to alter the quote “staggered up from the filth of our wallowing” to “stagger up from the filth of our wallowing.”
What is the proper way of altering the "staggered"?
4 AnswersWords & Wordplay7 years agohow do you make Douglass possessive?
Is the correct way "Frederick Douglass’s book..." or is it something like "Frederick Douglass' book..."
2 AnswersWords & Wordplay7 years agophysics work and friction in car engine?
When an automobile moves with constant velocity, the power developed in a certain engine is 104 hp.
What total frictional force acts on the car at 58.3 mi/h ?
1 hp = 746 W and 1 m/s = 2.2374 mi/h.
Answer in units of N
Please show work.
1 AnswerPhysics7 years agoHow much force does a 1 kg rock dropped from 5 m exert on the ground?
Please show work
1 AnswerPhysics7 years ago
How do I answer this centripetal acceleration problem?
Please show the general steps/method.
2 AnswersPhysics7 years agoConvert J/K to J/mol*K?
It seems like both of these are acceptable units for delta s, but I don't understand why. How are they equivalent and how do you convert between them?
1 AnswerChemistry7 years agoWhy must the definition of enthalpy include a reference to "constant pressure?"?
Please explain.
1 AnswerChemistry7 years agoWhat's the 2nd derivative of x^2+y^2=1 ?
1 AnswerHomework Help8 years agoPhysics acceleration problem?
What is the answer to this physics problem?
http://tinypic.com/r/2cypa15/5
I tried 7.21070 * 10^-25 and -7.21070 * 10^-25 but neither are right.
1 AnswerPhysics8 years agoDoes this graph have a cusp, corner, or discontinuity?
At x = 0 does this graph have a cusp, corner, or discontinuity?
Graph: http://tinyurl.com/lolmaz4
2 AnswersMathematics8 years agoIdentify the reducing reagent in the following reaction.?
3CuCl2 (aq) + 2Al (s) -> 2AlCl3 + 3Cu (s)
1 AnswerChemistry8 years agoPlease determine the correct chemical equation.?
CuCl is dissloved in water. When a strip of aluminum is added, a chemical reaction is observed. Please write the equation describing this reaction.
1 AnswerChemistry8 years agoWhat is the equation for this physics situation?
An object accelerates at 2 m/s^2. Write an equation for the distance traveled f(t) where t is in seconds.
2 AnswersPhysics8 years ago