A Proton Has a Speed Of $7.2 \times 10 ^ { 4 } \mathrm {~m} / \mathrm { s }$

question 174

Multiple Choice

A proton has a speed of $7.2 \times 10 ^ { 4 } \mathrm {~m} / \mathrm { s }$ . What is the energy of a photon that has the same wavelength as the de Broglie wavelength of this proton? $\left( m _ { \text {electron } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , c = 3.00 \times \right.$ $\left. 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

• A) \(440 \mathrm { keV }\)
• B) \(150 \mathrm { keV }\)
• C) \(230 \mathrm { keV }\)
• D) \(370 \mathrm { keV }\)
• E) \(300 \mathrm { keV }\)

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A condition or point where market supply and demand balance each other, and as a result, prices become stable.

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