Answer:
There's one or two reasons, depending on what is meant by "wind-powered car".
The first reason is that it's impossible for any transfer of energy to be 100% efficient. There will always be frictional losses.
Secondly, if the company means that they want to attach a wind turbine to the car so that the car is powered by the same wind that it generates, that violates the conservation of energy.
Mantle convection
Explanation:
The driver of moving plates is the mantle convection.
Convection is a heat transfer process that involves the movement of fluids from one place to another.
How does convection occur in the mantle?
- Part of the mantle known as the asthenosphere is a hot liquid. It moves slowly and does not readily flow.
- Over riding the asthenosphere is the brittle lithosphere made up of the upper mantle and the entirety of the crust.
- The asthenosphere is at a higher temperature compared to the lithosphere on top.
- In order to achieve stability and thermal equilibrium, the asthenosphere rises to the surface whereas the dense and cold lithosphere sinks down.
- This way a convective cell is set up.
- Hot materials rises to the surface because they are light whereas cold materials on the surface sinks into the asthenosphere.
- Through this the plates moves.
Learn more:
Mantle brainly.com/question/9582362
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It causes a movement of convection in the water resulting in a pulling current.
Hope this helpss
The friction force is given by:
Where μ is the coefficient of friction (static or kinetic) and
is the normal force. So we say the friction force is directly proportional to the normal force with a constant of proportionality equal to the coefficient of friction.
