The dielectric in a capacitor serves two purposes. it increases the capacitance, compared to an otherwise identical capacitor with an air gap, and it increases the maximum potential difference the capacitor can support. if the electric field in a material is sufficiently strong, the material will suddenly become able to conduct, creating a spark. the critical field strength, at which breakdown occurs, is 3.0 mv/m for air, but 60 mv/m for teflon.
part a
a parallel-plate capacitor consists of two square plates 16cm on a side, spaced 0.45mm apart with only air between them. what is the maximum energy that can be stored by the capacitor?
part b
what is the maximum energy that can be stored if the plates are separated by a 0.45-mm-thick teflon sheet?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Fill in the blanks with the numbers is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance