Physics conductivity in metals

Mechanics Mechanics is generally taken to mean the study of the motion of objects or their lack of motion under the action of given forces. Classical mechanics is sometimes considered a branch of applied mathematics. It consists of kinematicsthe description of motion, and dynamicsthe study of the action of forces in producing either motion or static equilibrium the latter constituting the science of statics.

Physics conductivity in metals

Photovoltaic power generation employs solar panels comprising a number of cells containing a photovoltaic material. The Australian Government provides incentives for the use of PVs for both domestic and industrial use you can save money, and save the environment. Solar photovoltaics generates electricity in more than countries and, while yet comprising a tiny fraction of the GW total global power-generating capacity from all sources, is the fastest growing power-generation technology in the world.

Between andgrid-connected PV capacity increased at an annual average rate of 60 percent, to some 21 GW. A good EEI would be to measure current as a function of the angle of incidence of sunlight all within a short period of time eg 30 minutes ; measure current when collector is perpendicular to rays during the day how should that go?

If so, you could put a load on the circuit resistor and measure V and I. In the method shown below, Moreton Bay College students are measuring the effect of angle on the flow rate hence power output of a electrical water pump. This was Year Energy output of a solar panel II You could also investigate the effect of shade on the output of a panel.

In this photo, students are using layers 1, 2, 3 etc of shade cloth. It would also be interesting to see the effect of light of different wavelength to see if the solar cells are sensitive to all wavelengths.

You could use coloured cellophane - but then that reduces intensity and not all coloured cellophane has the same percentage transmission. For large-scale solar plants to maintain their maximum efficiency, the photovoltaic cells must be kept clean, which can be a challenging task in dusty environments.

One good EEI would be to investigate the effect of dust on the solar panel. This is a harder EEI than the two above. It involves setting up a solar panel a short distance from an incandescent bulb eg 15 cm and adding controlled amounts of "dust" eg bentonite clay powder, fine sand, icing sugar to the face of the panel spread evenly.

It is a good idea to adjust the panel so it is working at maximum power. Do this by setting up the circuit on the left below, using either a variable resistor or fixed resistors that can be varied from 0 ohm to ohm.

Plot a graph next figure to see the maximum power point. Then add the bentonite 0. A good article is in Physics Education, V45, Septemberpage Solar panel output and temperature The output of a solar photo-voltaic PV panel changes during the day for two reasons: I have 16 Suntech panels.

Any cloud cover on these days seems to help output a lot also. I have got I also have black tiles but have a good 50mm gap between roof and panels so it should have reasonable airflow. This suggests a good EEI. Then with constant illumination, you could put the PV panel on top of a hotplate and crank up the temperature.

How high a temperature - well, you can decide. Alternatively, you could hold the temperature constant and vary the illumination. Year 12 student Ryan Phillips from Villanova College, Brisbane, used an electric bar heater in front of the solar panel.Conductors and Conductivity There are many materials that allow charges to move easily.

They are called ashio-midori.comtors have the quality of conductivity.I guess that's not a lot of help for you. See how light knocks electrons off a metal target, and recreate the experiment that spawned the field of quantum mechanics. Visualize and describe the photoelectric effect experiment.

Correctly predict the results of experiments of the photoelectric effect: e.g. how changing the intensity of light. Physics: Physics, science that deals with the structure of matter and the interactions between the fundamental constituents of the observable universe.

In the broadest sense, physics (from the Greek physikos) is concerned with all aspects of nature on both the macroscopic and submicroscopic levels. Its. Materials with a high thermal conductivity constant k k k k (like metals and stones) will conduct heat well both ways; into or out of the material.

Physics conductivity in metals

So if your skin comes into contact with metal that is colder than your skin temperature, the metal can rapidly transfer heat energy out of your hand, making the metal feel particularly cold. SENIOR PHYSICS RESOURCES FOR PHYSICS STUDENTS & TEACHERS 'DEADLY' EEI IDEAS Ideas for Year 11 and 12 Physics Extended Experimental Investigations.

Wiedemann-Franz Ratio The ratio between thermal and electrical conductivities of metals can be expressed in terms of the ratio: which may be called the Wiedemann-Franz Ratio or the Lorenz constant.

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