Physics 11 Homework Blog

Feb 26, 27 Homework

Review 5.4

Make up test to be scheduled


Ph11- Thermal Energy Lab – Due March 2

Record observations of a beaker of cold water being heated, to boiling… IN CLASS!

Describe the steps and observations.

How does a thermometer measure temperature?

Alcohol-filled and (BONUS) digital bimetallic junction– answer with physics

Are your thermometers accurate? Precise?  “scientifically” acceptable?  Good enough?

Make a precis of the two point calibration procedure.  How about a 2nd thermometer?

Do your results confirm the Law of conservation of thermal energy?  to what % Show clear calculations

Does the energy lost by hot water equal the energy gained by the cold water?

Does it make “sense” why one is almost certainly different from the other.

The masses of the hot and cold water must NOT BE EQUAL,

and the final mass of mixed warm water must be measured again, not assumed.

Did you pour the warner water into the cup with the colder water?  Explain your technique, does it cause, or minimize error?

Which one lost or gained more energy?  Why?

How do you explain the difference of your results from an ideal theory of thermal energy conservation?


pHET Simulations

Force Basics

HK Simulations

Forces in an Elevator



Quality Momentum Experiment

Hewitt Drew it – Cartoony Explanation Cannon

Hewitt Drew it – Cartoony Fish Lunch Problem

Hewitt Drew it Series

Crash Course Series

Khan Academy Series

Learn Engineering Series


Physics is often about coming up with the best concise (mathematical) description of reality.  This technology seems to violate current/accepted understanding of Law of Conservation of Momentum.  The RF Resonant Cavity Thruster – EMDrive, prototypes have been tested by NASA and the Chinese Space Agency and demonstrate small amounts of thrust, without ejecting propellant matter, only photons… Article about emdrive  Does experimental evidence show that theories are incomplete, flawed or wrong?


Who wants to be an Engineer?  Whoo-whoo!!

Real train physics/Mechanical Engineering:  Tractive Effort vs Horsepower

Engineering often involves figuring out the most economical way to get something done, within the limits of material strength, reliability and variability due to weather, etc.


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