Phet Lab 16

* Protons and electrons have equal and opposite electrical charges. Protons are positively charged, and electrons are negatively charged.

The current has a positive charge in one side of the coil and it transforms to negative when it gets to the other side of the coil. This charge controls the magnetic field, making the like charges repeal and the opposite charges attract.

potential energy and kinetic energy. As the train moves, it gradually loses energy to friction until it

As the car go down it looses its potential energy because it is not at the same height anymore. As it loses the potential energy it gains kinetic energy. Kinetic energy came along because of its high speed. The mathematical equation for this is initial kinetic energy plus initial potential energy plus external work equals final kinetic energy plus final potential energy. To find work the equation is force times distance. To find power the equation is work divided by time.

The law, conservation of energy states that the total amount of energy within a system remains constant at all times, although energy within the system can be changed from one form to another. Energy cannot be created or destroyed, but it can be transformed. The law of conservation of energy states that when energy is being used, it’s not being used up instead it’s being transformed from

9. These two identical 330Ω resistors are in series with each other. There is only one path through the circuit from the power source to the ground. In this diagram, the power source is a 9V battery. One end of the battery has 9V of potential to do work (positive terminal-top). The other end of the battery has zero potential to do work (negative terminal/ground-bottom).

- The final electron energy does not depend on the focusing cylinder voltage because it applies a force that is parallel to the magnetic field rather than perpendicular to it.

The body and cells need a constant supply of energy for a variety of reasons. Energy is needed to carry out mechanical work which involves the change in location or orientation of a body part or the cell itself. A major example is the energy required for the contraction of muscles. Molecular transport also requires energy. The movement of molecules from an area of low concentration to an area of higher concentration requires energy since this is opposite to the normal movement of molecules. This process is also called active transport. Examples include the movement of nutrient raw materials into a cell and the movement of waste materials out of the cell. Electrical work is also included under molecular transport

3. Electrons are small and are negatively charged (-) with a mass of almost 0 amu..

1. (6 points) Use the controls under Show Vectors to draw arrows for several different quantities. The velocity vector is drawn in a special way: a big, bold arrow showing its direction and magnitude, plus smaller arrows for its horizontal and vertical components.

1. Why do electrons (blue dots) move? Draw a diagram of the battery, label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal of the battery.

To get the equation of this line, I need → a. a point and b. a slope

The electrons move because they experience a electric current force in the wire. The battery causes an electric field and the electrons experience a force due to that field. The current flows in the opposite direction of the electrons and the flow of the

Voltage represents electric potential energy per unit charge. If a unit of electrical charge was placed in a location, the voltage indicates the potential energy of it at that point. Basically, it is a measurement of the energy contained within an electric circuit or electric field at a given point.

When playing a video game, you often can “power up” to increase the strength of your player? What does power mean in science? Power is the rate at which work is done. That is, power is the time it takes to do work on an object. Because of this, power is also the rate at which energy is transformed from one form to another. When we do work on an object, we apply a force to move it over a distance. This work changes the energy of an object. That is, the work can change the kinetic energy of an object by increasing or decreasing its speed. It can also change the potential energy by storing or releasing energy in the object. Doing work often changes both the kinetic and potential energy of an object by transforming energy from one form to another.