# Energy Conservation

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## Energy Conservation Video Lessons(9 video lessons)

Watch simple explanations of Energy Conservation and related concepts.

Test your understanding with practice problems and step-by-step solutions.

How much energy in J is lost when a sample of iron with a mass of 27.8 grams cools from 76 to 26 degrees Celcius?
If the proton is fired at a speed of 3.0x10^7m/s, what is its closest approach to the surface of the nucleus? Assume the nucleus remains at rest.
A 35 g sample of Fe is dropped into 80 g of water at 20 degrees Celsius. What is the final (equilibrium) temperature of the iron/water?
One third of vanilla ice cream provides about 145 kcal of energy. A typical adult uses about 195 kcal/hr of energy while walking. If all of the energy in one third of a cup of vanilla ice cream wer
A 200 g puck sliding on ice strikes a barrier at an angle of 53 degrees and it bounces off at an angle of 45 degrees. The speed of the puck before the bounce was 15 m/s and after is 12 m/s. Changes
A rollercoaster car may be approximated by a block of mass m = 2.0 kg. The car which starts from rest is released at a height h above the ground and slides along a frictionless track. The car encou
A collar with a mass of 1 kg is rigidly attached at a distance d = 300 mm from the end of a uniform slender rod AB. The rod has a mass of 3 kg and is of length L = 600 mm. Knowing that the rod is r
When 1.0 g of gasoline burns, it releases 11 k cdot cal of heat. The density of gasoline is 0.74 g / mL. a) How many mega joules are released when 3.0 of gasoline burns? b) If a television requ
How does the conservation of mechanical energy explain why a planet in an elliptical or!@#\$%^&anges speed?
To combat wasteful habits, we often speak of conserving energy, by which we mean turning off lights, heating or cooling systems, and hot water when not being used. We also speak of energy conserva

## Energy Conservation Quizzes(32 quizzes)

Check your mastery of this concept by taking a short quiz.

Issues with Energy Conversion
Saving Electricity Facts for Kids
Energy Conservation Facts for Kids
Energy Conservation
Politics & Energy Resources
Energy Conservation vs. Energy Efficiency
How to Conserve Energy at Home