Tagged Questions
0
votes
1answer
37 views
When moving something by entrainment in a fluid stream, where does the energy come from?
The particular Something I had in mind here would be air bubbles that are pulled downwards against their buoyancy by a stream of water falling down a shaft. The work required to push those bubbles ...
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vote
2answers
150 views
Finding an equation relating the mass of a blade of a wind turbine to its velocity
I'm writing up my physics coursework and I thought I'd try and find an equation described in the title. This is my attempt:
Is it correct?
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3answers
352 views
Conservation of energy in objects at terminal velocities
In vacuum, object free falling under gravity, the sum of Gravitational Potential Energy(GPE) and Kinetic Energy (KE) is a constant. The GPE is a decreasing side of a quadratic and KE is a increasing ...
2
votes
1answer
243 views
Bernoulli equation from energy conservation
I have derived the energy conservation equation:
\begin{equation}
\frac{\partial}{\partial t} \left [ \frac{1}{2} \rho v^2 + \varepsilon + \rho \phi \right ] + \frac{\partial}{\partial x_j} \left [ ...
1
vote
1answer
348 views
Kinetic energy loss when a rigid body falls into water
Assume you have a rigid body falling into the ocean at terminal velocity. Also assume that the rigid body does not break on impact. How could you figure out how much kinetic energy would be lost in ...
