Purchase Solution

Potential Energy and Energy Conservation

Not what you're looking for?

Ask Custom Question

A hydroelectric dam holds back a lake of surface area that has vertical sides below the water level. The water level in the lake is a height above the base of the dam. When the water passes through turbines at the base of the dam, its mechanical energy is converted into electrical energy with n efficiency.

1. If gravitational potential energy is taken to be zero at the base of the dam, how much energy is stored in the top meter of the water in the lake? The density of water is Pwater.
Take free fall acceleration to be g.

2. What volume of water must pass through the dam to produce an amount of electrical energy totaling U of electrical energy?

3. What distance does the level of water in the lake fall when this much water passes through the dam?

Purchase this Solution
Solution Summary

This solution answers water energy, volume and distance problems.

Purchase this Solution
Free BrainMass Quizzes
Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

The Moon

Test your knowledge of moon phases and movement.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Basic Physics

This quiz will test your knowledge about basic Physics.

View More Free Quizzes
Related BrainMass Solutions

  • Bullet Motion and Conservation of Energy

    The potential energy of the block with the embedded bullet is: From conservation of energy we can say: Where K is the kinetic energy of the block-bullet object, and i and f subscripts refer to initial and final state respectively.

  • Inelastic coliision momentum

    At point B, Tarzan and Jane have only kinetic energy: But from part 2 we have: And therefore: At point C, Tarzan and Jane have only potential energy: From conservation of energy: All that is left is to plug

  • Principle of energy conservation.

    Use the principle of energy conservation in the analysis and solution. If we define the gravitational potential energy is zero when at the horizontal level when the spring is compressed 15 cm. The initial total energy of the block is m*g*(5+0.15).

  • Conservation of energy

    The potential energy (which is also the final total energy) is: From conservation of energy we know that the total energy must be conserved, therefore: We are required to give the answers in term of g and re.

  • Conservation of Momentum and Energy

    Initial potential energy: Final kinetic energy: Ek= Solving for v1i (The velocity of m1 just before the collision): Step 2: Conservation of momentum and energy.

  • the kinetic energy K of the block

    In other words, E = K + U = Constant where E is the total mechanical energy of the system, K is the kinetic energy, and U is the potential energy. a). Find the kinetic energy K of the block at the moment labeled B.

  • Physics: Potential Energy and Energy Conservation

    347369 Physics: Potential Energy and Energy Conservation A 2.00 kg block is pushed against a spring with negligible mass and force constant k = 400 N/m, compressing it 0.220 m.

  • Conservation of energy problems involving moving particles and systems

    V:mechanical energy changes because potential energy changes) 22) From conservation of energy m*g*h=m*v*v/2 =>v=sqrt(2*g*h) 23) Initial mechanical energy=m*g*h1 final mechanical energy=m*g*h2+m*v*v/2 from energy conservation m*g*h1=m*g*h2+m*v

  • energy conservation in an eleastic system

    We use here conservation of energy. Please note: In the second part a lot of students (and sometimes teachers) forget to include a potential energy term as well.

  • Energy Conservation Calculation

    How far up the incline will the block go before sliding back down if the coefficient of kinetic friction between the block and the incline is 0.17? Use the principle of energy conservation in the analysis and solution.

View More Related Solutions