The conduction electrons in a metal could be approximated as free particles, which ane described by the fermi statistics. in order for the conduction electrons to escape at the surface of a metal, they need to overcome a potential energy barrier of height δ at the surface, an elect ron will escape only if its component of velocity normal to the surface as 'm exceeds calculate the current density of the electrons emitted from the surface, you may assume (a-7) > > kt where μ is the chemical potential

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

u can delete ur account.

1. go on google and write

2 open this and click on your profile pic and if your profile is not appearing, then u have to log in.

3. when u click on your profile pic, there appears four options on the top.

4. click on the 1st option and scroll down and go at the bottom.

5. click on edit profile.

6. there appears a option 'prefernces' and at that option at the right side , 'edit' is written.

7. click on the edit option.

8. there is a option " i want to delete my account" and click on that.

hope this u

and ur welcm

: )

i believe the answer would be:

d. violin, clarinet, french horn, and tuba