Answer:
B) krypton
Explanation:
Electron configuration of Br: [Ar] 3d10 4s2 4p5
Since we have the bromide ion with a negative charge, Br's atom acquired an electron and therefore another electron is added to the electronic configuration
.
Electron configuration of Br-: [Ar] 3d10 4s2 4p6
And now this electronic configuration coincides with that of Krypton as we see below
:
Electron configuration of Kr: [Ar] 3d10 4s2 4p6
The initial kinetic energy of the cart is
After the block is dropped into the cart, if there are no other forces acting on it, the kinetic energy of the new system cart+block must be conserved, so it should be the same as before. But the new mass will be M+m, where m=50kg is the mass of the block. Therefore we can write
from which we find
Oh ya the correct answer for this is B I think because structure B
Answer:
q = 3.356×10^-6C
Explanation:
In a cube of air,the electric field is perpendicular to the top and bottom of the cube,the total reflux = reflux200 + reflux300
But reflux is given by:
Reflux= E×A = E×A cos theta.
Where theta is the angle between the area vector and the electric field.
Total reflux = E300×A cos180 + E200×A cos0
Total reflux = -E300A + E200A
Total reflux =A (E300-E200)
Total reflux is given by Guass's law = Total reflux =q/Eo
q=Eo×total reflux
q= EoA(E200-E300)q= (8.84×10^-12)(100)^2×(100-60)
q=3.356×10^-6C
Because the persons head is probably slammed into some part of the car and that means that the persons slammed on the brakes really hard so the person is probably injured
i hope this helps