Physics, Chemistry, Mathematics Forums

find the range of:

f(x)=sqrt(16-x²)

we get the domain as [-4,4] but we only take [0,4] as the range. can someone tell me why  dont we take the negative values

Show that the semivertical angle of the right circular cone of given total surface area (including area of the base) and maximum volume is sin^-1(1/3)

Is the equation of a circle x²+y²=1 is a function ? Justify your answer.

If not then what is the meaning of a circular function?

let a,b,c be 3 vectors having magnitude 1,1,2 resp. if a*(a*c)+ b =0 {*-cross product} . find acute angle b/w a & c.

my way is that take a cross with b.then proceed as b*b=0 & b*a*(a*b)=0, then take b*a as r proceeding i'm getting 60 but answer is 30

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FAJAN RULE SAYS THAT DISTORTION OF ELECTRON CLOUD TAKES PLACE WHEN SIZE OF THE CATION IS SMALLER THAN ANION . WHAT IF ITS REVERSE THAT IS SIZE OF ANION IS SMALLER THAN CATION FOR EXAMPLE CESIUM FLUORIDE. HOW DO WE EXPLAIN ITS IONIC NATURE THOUGH HERE ALSO THERE SHOULD BE DISTORTION.

Hi,

I'm having trouble with cracking screening type papers.I get shot down by time constraints and negative marking.What should  I do?

-Bye

In Chemistry Do We Have Osmotic Pressure ? 2005 Syllabus Says YES And The Syllabus FOR 2006 Says No. Do Any Of You Guys Know Anything About This.

I Heard That IIT Examiners Are Looking For The New International Sign Conventions To Be Used In Solving Problems relating To Optics.
What Is The Sign Conventions To Be Used In Solving Problems Regarding REFRACTION AT SPHERICAL SURFACES ?

triangle ABC is an equilateral triangle each side being 60 units.At time t=0,a particle P starts moving from point A to point C along side AC of the triangle with a constant speed of 2 units per second.A second particle Q starts moving from the mid-point D of side BC towards C with a variable rate so that area of triangle PQC always remains half of area of triangle ABC.Determine the time at which rate Q's rate becomes same as that of particle P.