calculate the de broglie wavelength of He atom at 27 degree celsius & v=2.4*1000
Lines L1 and L2 intersect at O. A and C are points on L1 such that OA=11,OC=9. B and D are points on L2 such that OB=3,OD=22. What is the ratio [OCD]/[OAB]?
Let f(n)=1/√1+√2+1/√2+√3+1/√3+√4 1/√n+√n+1. For how many positive integers n, in the range 1≤n≤1000, is f(n) an integer?
What is the sum of all 2-digit positive numbers whose digits are either 1, 2, 3 or 4?
What is the sum of all possible positive integer values of n, such that n^2+19n+130 is a perfect square?
How many positive integers less than 1000000 have the sum of their digits equal to 7?
the displacement-time graph of two bodies P and Q are straight lines making angles 30° and 60° respectively with time axis .Calculate the ratio of velocities P and Q
Jose was playing a game with marbles.In the first round ,he lost 1/4 of his marbles.In the Second round,he lost 1/3 of his remaining marbles.In the third round,he lost 1/2 of his remaining marbles.He gave 1 marbles to his friend shavana.He had 1 marble left. How many marbles d...
Suppose That A Scientific Breakthrough Leads To The Discovery Of A New Cheap Source Of Energy. What Would Be The Effect Of This Invention In The Short-Run And In The Long-Run?
Factor Completely: 1000p^3 - 1 help please