Hi I really need help!!!!!!!!
I need to do a presentation on Magnetism. The presentation needs to be enjoyable and informative. Basically I am sposed to teach them but I dunno wat to do. Any ideas?
Can you check my answers regarding ground energy states
Calculate the ground state energy of the B4+ ion (i.e. for n = 1), and the energy of the next four highest energy levels (i.e. for n = 2, 3, 4, 5).
My answers are:- boron z=5
n=1 E1 = -340 eV n=2 E2 = -85 eV n=3 E3 = -37.78 eV n=4 E4 = -21.25 eV n=5 E5 = -13.6 eV
Are these right? thanks for your help.
Carol eats a regular hamburger and drinks a glass of cow's milk for breakfast. Suppose that energy content of the hamburger and the milk are 2115 kJ and 565kJ respectively. What % of energy from the food does Carol use to push a sack of rice along a horizontal distance of 4.75 m? Her hands exerted a force of 50N applied 20° down with the horizontal.