Blog #4

Capacitance and Voltage. This week in physics we learned about capacitance. Capacitance is electrical energy that is stored for a short time. Capacitance has a very high electric potential but has little charge. So it has a lot of voltage per charge, but not a lot of charge. Its formula is C=Q/V (Capacitance=charge/voltage). The units of capacitance are known as farads. Capacitance is used a lot today because of all the technology we have. To use computers we need to press buttons. These buttons are basically made of 2 plates separated a certain distance with epsilon in between. Epsilon is the conductive material between the 2 plates. The material used in between plates in modern technology is known as dielectric. When the plates touch the material in between them it releases the capacitance and sends the high voltage to the brain of the computer. This tells the computer what to type on the screen.

    My picture relates to this because it uses capacitance for it to work since it is a touch screen phone.

Blog #3

Potential of Electricity!
Electric Potential is the voltage of something. It is also known as electric Potential difference.The units for electric potential are joules/charge. Something in the "real world" that has electric potential is an outlet. It has a voltage because it has about 120volts/charge. The amount of volts isn't what hurts people it is the amount of charge that matters. My picture relates to this because it is a picture of a outlet. When I plugged in my laptop charger to this outlet it sparked. If I put a screwdriver in the outlet instead of a charger plug then I would have been electrocuted. Isn't that shocking?

Blog #2

Charges! This week in physics we started to learn about electric charges. There are three kinds of charges positive (+), negative (-), and neutral. The charge force law tells us that like charges repel and unlike charges attract. Now you maybe wondering why there is a picture of boxing gloves. Boxing gloves can represent this law if you were to imagine them as being positively charged. These gloves repel when hitting other gloves because they have like charges. But these gloves are very much attracted to neutral (no charge) faces. So when a boxing glove hits someone in the face it is very sore because the glove is as attracted to the face as the face is to the glove.

Semester 2 Blog #1

        Semester 2 PHYSICS! This week in physics we started to learn about electric charges, forces, and fields. We learned that there is a Law of Conservation of Charge, a charge-force law, and conductors and insulators. The Law of Conservation of Charge is that in an isolated system the net charge will remain constant. This means the charge in will equal the charge out (just like momentum and energy laws). The Charge-Force law tells us that like charges will repel (++, - -) and unlike charges will attract (+ -, o +, o -). Finally we learned about conductors and insulators. A conductor is an object that transfer electrons easily, for example metals. Insulators are objects that do not transfer electrons easily, for example rubber, glass, or plastics. These are all the main things we learned in physics. Besides all of this we also did a "magic tape" lab. This lab enabled us to learn about charges with an item we commonly use.

          My photo (left) is of a reflex boxing bag. This item has both insulators and conductors. The top of this unit is made of foam (insulator). The second part is the metal pole and spring which are both made of metals (conductor). The last part is the base which is made of plastic (insulator).