Check that the point (−1,−1,3)(−1,−1,3) lies on the given surface. Then, viewing the surface as a level surface for a function f(x, y,z)f(x, y,z), find a vector normal to the surface and an equation for the tangent plane to the surface at (−1,−1,3)(−1,−1,3).

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j