Feb 11, 2016 · When decaying by alpha emission a nucleus drops by 4 in mass number and 2 in atomic number and emits a helium nucleus (alpha particle) which has mass number 4 and atomic number 2. …

See explanation As 5^2 + 12^2 = 13^2, the Pythagorean theorem is satisfied and we have a right angled triangle APB. This means that both AP and PB are perpendicular to AB. E_{q1} = (0.008 k)/0.05^2 = …

Mar 28, 2016 · Explanation: Given point #-> (x,y)-> (-3,10)# Given gradient #" " (m) =-2# Thus #y=mx+c" "# becomes #" " y=-2x+c# '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #color (blue ...

It's impossible to answer this specifically without the diagram, but use the Law of Cosines. If you have distances DP and DQ as well as the angle between them (or "Side-Angle-Side"), you can use the …

a=0, 4 we will use the scalar (dot) product . for two vectors veca=a_1hati+a_2hatj+a_3hatk," "vecb=b_1hati+b_2hatj+b_3hatk veca*vecb=|veca||vecb|costheta----(1) theta ...

see a solution process below; From the question; Let, n = "no of water pumps" t = "time" 3n -> 8hrs 4n -> xhrs Since they flow at same rate therefore, it takes a single pump; n = 8/3 pump per hour to fill a …

This is a fascinating question, and one that is still being actively considered. I can give you a basic answer here and point to better sources. The moon almost certainly formed as a result of an …

Explanation: For an easy solution to all proof questions its convenient to go for L.H.S= R.H.S method:

Dec 3, 2017 · Sides are each (5x-2)cm P= 20x-8 P= 252cm The area of a rectangle is A=lxxb Factorise the trinomial given as the expression for the area. This will give you expressions for the length and …

Feb 13, 2018 · Try significant digits. You answer is correct. But the significant figures of your answer might not. Double check the way the numbers are written down in the original question. Is 2m written …