What is the formula for calculating the efficiency of a heat engine
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Answer:
The spacing between the planes of the crystal is 0.295 nm
Explanation:
Given:
λ = wavelength = 0.24 nm
θ = angle of incidence = 66°
The spacing d between the planes of the crystal is equal:
We can solve the problem by using the law of conservation of energy:
- at the beginning, all mechanical energy of the object is just kinetic energy: , where m is the mass and v is the velocity
- at the point of maximum height, all mechanical energy of the object is just gravitational potential energy: , where h is the maximum height
Therefore, the conservation of energy becomes:
Re-arranging, we find the maximum height: