Phase Change

Some phase changes are more common and easier for us to visualize. For example, you have probably witnessed freezing, melting, and vaporization just by making ice, melting ice, and boiling water.Condensation often occurs on the outside of cold beverage containers.

Too Hot / Too cold

  Water's boiling point 212 f degrees because of its molecular structure however compared to wood water would heat up a lot faster. Wood is more dense then water therefore leaving wood to heat up at a slower rate then water. But compared to wood steel would heat up even slower because of its metal properties leaving water to be the one to heat up the fastest out of the three.  

Doppler Radar

The basics of radars is that a beam of energy, called radio waves, is emitted from an antenna. As they strike objects in the atmosphere, the energy is scattered in all directions with some of the energy reflected directly back to the radar.

The larger the object, the greater the amount of energy that is returned to the radar. That provides us with the ability to "see" rain drops in the atmosphere. In addition, the time it takes for the beam of energy to be transmitted and returned to the radar also provides is with the distance to that object.

Analog radars use continuous radio wave transmission and simultaneous listening.

Early National Weather Service radars were transmitting energy and listening for returned energy simultaneously. This is why old images from old radars showed a sweeping line. With each sweep of the radar an object its position would update.

With the advent of Doppler radar, instead of a continuous transmission of energy it emits extremely short bursts of radio waves, called pulses. It then "listens" for and returned energy.

By their design, Doppler radar systems can provide information regarding the movement of targets as well their position. When the WSR-88D transmits a pulse of radio waves, the system keeps track of the phase (shape, position, and form) of the transmitted radio waves.

By measuring the shift (or change) in phase between a transmitted pulse and a received echo, the target's movement directly toward or away from the radar can be calculated, called radial velocity. A positive phase shift implies motion toward the radar and a negative shift suggests motion away from the radar.

Interference

      Interference is the reaction when more then one wave is in a medium. The different between constructive interference and destructive interference is that in a constructive interference the crest of a wave is super positioned with the crest of another wave to increase the amplitude. And in a destructive interference is when the crest of a wave is super positioned with the trough of another wave to decrease the amplitude.


                    

     

Standing Wave

    Today in class we did standing wave, we basically swing one end of the spring back and forth over and over again along the floor. Which the result of doing that is called a periodic wave. I learned that standing wave is a pattern of a wave that looks stationary or not moving.

Electricity Generator

     I thing that the solar system is interesting. It'is clean, and is renewable. 
 The bad thing is that is not on demand, and it takes a lot of space.
A solar power generator uses the sun's energy to create electricity. Unlike a photoelectric panel, which converts sunlight directly into electrical current, a solar thermal generator uses the sun's heat to create electricity.

Simple Harmonic Motion

I would know when something is simple harmonic motion by the way it moves if the object is moving back and forth then that will be simple harmonic motion.

Ex.
this is simple harmonic motion because is going back ad forth.




this is simple harmonic motion because as you see is going back and forth.




when you touch the strings from a guitar the go back and forth, there for it's simple harmonic motion.