Solar Water Distillation Project Physics 2015

Description:  Students will design and construct a solar thermal powered still.

Due Date:  June 1,
One partner is allowed or individual.

1.   The device will change dirty salty water into clean pure drinkable water of low conductivity as measured by a conductivity probe.

2.    Grading will be based upon a 24 hour test period of 90% sun starting Monday, June 1 in a secure area on campus.  In the event of clouding a second test will be performed June 2nd, or when sun is available.

3.  The total area of collector may not exceed 0.36 square meters.

4.  80% of the materials by weight must be  post consumer materials  such as used food containers, cardboard, worn tires,   construction debris, etc.

5.  Value:  This project is valued at 100 points.

6.  The test will be done on grass in the courtyard.

7.  Your project is required to have wind protection for winds up to 30 miles per hour.  There is  10 point deduction for designs without wind protection.  If ballast is your plan you are required to use at least 10 pounds.

8.  The reliance on tape to remove your clean water  will result in a 10 point deduction.  This is an inferior material for a project that generates steam.  Do not tape your glazing to your project body.

9.  A deduction of 10 points will result if your project requires more than 5 minutes to add dirty water, secure the glazing and stake down for wind protection.

10.  Grading will be based upon the production of clean water in mls.

250 ml =  A

200 ml = B

100 ml = C

5 ml = D

Less than less than 5 ml = F

Suggested design elements:

1.  Research the best orientation for capturing maximum sun in our latitude

2.  Do not allow vaporized clean water to escape from your project

3.  Keeping mass low will allow for quick temperature increases.

4.  Selective insulation can prevent heat loss through radiation back into the environment

5.  Some glazing will prevent light transmission.  This is to be avoided

6.  To maximize condensation your condensation surface must be cooler than the vapor inside your project

7.  Here is a link to a small still made from some recycled components

Chemistry Review Chapter 11 Chemical Reactions

1.  Balance   an equation using coefficients given formulas

2.  classify a type of reaction ( one of five)

3.  Write a balanced chemical equation given words for products and reactants

4.  Predict products  given formulas of reactants

5.  Predict if a reaction will occur using activity series

6.  Predict if precipitation occurs using the solubility rules

7.  Predict products including if a reaction occurs, balance and state reaction type and indicate the state (solid, aqueous or gas) of all chemicals involved

Physics Heat and Temp Review

Numbered Heads Heat and Temperature Review

1.     Definition of temperature  and association with kinetic energy increase on a molecular level.  Know mass plays no part in temperature.

2.     Understand that in thermal equilibrium there is no energy transfer and why.

3.     Know the boiling and melting points of water  and how during a phase change there is thermal equilibrium.

4.     Know the 3 widely used temperature scales and the units for energy.

5.     Know how to convert C. to F. and vice versa.  Memorize at least on form of the formula

6.     Know how to solve for  a temperature change in F  given two temperatures in C.  You cannot solve using the Temp difference in F!

7.     Solve for a delta T during an energy transfer process given Q, C  and mass.

8.     Know about temperature during a phase change and which formula is involved

9.     Interpret a heating diagram  (Q vs T) to  identify the phase changes and t calculate the latent heat of fusion or vaporization.

10.  Interpret a heating diagram  (Q vs T) to  identify the Q transferred during a single phase.

11. Convert K to C  and C to K

12.  Calorimetry  involving water where you solve for the C of an unkown metal given mass and Ti of the metal,  as well as M, C  and delta t of the water.

13. Find final equilibrium temp of a watery substance given m, Ti of the substance  when added to  a  defined mass of water where you know the initial temp of the water and the C of water.  The watery substance has the same C.

Chemistry Numbered Heads Review Chap 10

Numbered Heads Chap 10 Review

Chap 10 Chemistry Test Study Concepts

1.     Convert grams of a molecule (CO2) to moles of CO2.   Practice with other molecular formulas.

2.     Convert moles of a formula to grams of a formula (Calcium Carbonate)

3.     Convert Liters of a  gas at STP to moles of the gas .  Ex N2 gas

4.     Convert grams of a gas at STP to liters of a gas at STP ex Hydrogen H2 gas

5.     Convert Liters of a gas at STP to mass  of the gas at STP  Ex H2O gas

6.     Find the # atoms of an element Ex H, in a certain amount  of moles of a molecular  formula  (C6H6)

7.     Balance an equation

8.     Find the percent composition  of each element in a compound given the formula of the compound

9.     Find the percent composition of each element given the mass of each element in the compound but not the formula

10. Find the empirical formula from example 9 (You have figured out percent composition already)

11.   Find the molecular formula  from # 10 (empirical figured out already  given the molecular mass

12. Given the empirical formula find the molecular formula given the molecular mass.

CP Physics Fluid Concepts for Monday test

Fluid Concepts

1.     Find the density in kg/meters cubed  of regular and irregular shaped objects using formulas for volume when given dimensions in centimeter or millimeters.   Ex 50 kg  spherical rock with 200 mm diameter.  Or 10 kg cube 50 cm on each side.  Irregular objects would require displacement in water  data to find volume.  Ex Vol 1 = .000423 m cubed and v2 =  .000560 m cubed  and its mass is 20 kg

2.    Find the weight of an object placed on a raft on water where the dimensions of the raft are known ( ex 3m X 1m X .5 m)   and the depth that you sink in water when loaded is known.  Ex  2.0 cm.

3.    Find a buoyant force of a sunken object given the weight in air and the apparent or net weight in the fluid.

4.  Find the density   of the object in #3 given the density of the fluid and the results from #3.

5.  Find the new velocity of a fluid in a pipe of known diameter after coming from another diameter where the velocity was known.   Ex  1” pipe at 4.0 m/s   to ½ inch diameter pipe.

6.  Find gauge pressure given total pressure and atmospheric pressure

7.  Find the force exerted on a hydraulic lift where the radius of both pistons is known as is the weight of the object to be lifted

8.  Explain the physics of sailing.  Specifically, explain how a sailboat goes forward best when wind blows from the side.  You must explain with diagrams and bernoulli’s principle and vector analysis and explain the relevant parts of the boat  like hull, sail, keel.

9.  Find the depth  in a particular fluid like alcohol or water where the pressure is a multiple of atmospheric.  Ex 20 X atmospheric

Pressure Velocity Check Link

Here is the link

Chemistry Numbered Heads Review Chap 9

1. Form into the designated groups

2. Take out one full sheet of paper per group and list the name of the group at the top. Then list the names of the group members and place numbers next to each name (1, 2, 3…..If four members then write 4 also). It doesn’t matter who gets what number.

3. Hand the paper to the instructor. It will be used for assessment and graded.

4. Begin reviewing/ learning the listed concepts. Make up sample questions related to the concept. Try to imagine what question the teacher will ask. Time is limited; so don’t waste it!

5. Once you understand the concepts yourself locate the group members who do not understand  by assessing them. Do not ask yes or no assessment questions.

Good Assessment. “Sam, could you show me how to do number three on the list?”

Poor Assessment. “Do you guys all know it?”

Now teach them how to answer the questions you have formulated.  

6. When the instructor calls a number randomly (ex. = 3) the three will go to a designated area alone and respond to a similar question. Make sure they have something to write with and a calculator. After they leave begin studying the next set of concepts for the next round.

7. After a short amount of time the person will then return to the group and their answer will be graded by the teacher and given to the entire group as a communal score.

8. The returning group member may be called again so they should receive extra instruction to help get caught up.

9. The scores are added at the end to determine winners. The top three groups receive extra points on the test.

Chapter 9 concepts

1.  Know who loses and who gains electrons, anion  v cation,  and the types of compounds formed  in these combinations.   Also know whether anion or cation is listed first in the name.

2.  Know the names of all 40 polyatomic ions and charges.

3.  Know how to write the formula for a binary ionic compound given the name in stock or prefix system

4.  Know the latin roots for tin, iron and copper and the numeric prefixes 1-10

5.  Know how to write the formula for a binary molecular compound given the name in the  prefix system. 


6.  Be able to write the the name for either ionic or molecular compounds given the formula.

7.  Know how to name acids.  

8.  Know the difference between the laws of definite and multiple proportions including how multiple proportions are used