When a star is very hot, it’s

a. take a little energy for the electrons to “jump” from one energy level to the next

b. take a lot of energy for the electrons to “jump” from one energy level to the next

c. take no energy for the electrons to “jump” from one energy level to the next

d. none of the above

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

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