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An electron is accelerated through a uniform electric field of strength, E= 20 [N/C]. Determine the speed after the the electron travels 0.5 m from rest.

E=F/Q. F= 20*(1.6910^-19)=3.3810^-18NF=ma m=9.1110-31 kgTherefore, a = 3.71 * 10^12 m/s^2Since v^2= u^2 + 2as and s= 0.5m,Then v=1.9310^6 m/s

Answered by Luke F. • Physics tutor

2467 Views

Calculate the empirical and molecular formula of the molecule giving rise to the molecular ion peak at 148 m/z. The percentage composition by weight is 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen

Step 1, pick out the important information from the question: Carbon: Hydrogen: Oxygen % by weight: 64.8: 13.62: 21.58 Step 2, from the periodic table, find out the relative atomic masses of each element:...

Answered by Olivia H. • Chemistry tutor

6170 Views

Write x^2 - 6x +7 in the form (x+a)^2 +b

Follow standard procedure that can be taught on a whiteboard. In general:ax^2 + bx + c = (x+b/2)^2 - (b/2)^2 + csox^2 - 6x + 7 = (x-3)^2 - (9) + 7= (x-3)^2 - 2

Answered by James C. • Maths tutor

4831 Views

To what extent were the Atlantic Revolutions inspired by Enlightenment political ideas?

Equal rights for man were key political Enlightenment ideas that were pivotal to the American and Haitian Revolutions. These ideas were underpinned in Rousseau’s ‘Social Contract’[1] (Appendix, Sou...

Answered by Blayne S. • History tutor

5166 Views