In an X-Ray Tube, High-Speed Electrons Are Slammed into a Lead

question 75

Multiple Choice

In an X-ray tube, high-speed electrons are slammed into a lead target, giving off X-rays. If the electrons are accelerated from rest through a potential difference of 100,000 volts, what speed do they have when they strike the target? (q_e = 1.6 *10 ^{- 19} C, m_e = 9.11 *10 ^{- 31} kg, and c = 3.00 10⁸ m/s)

• A) 0.17c
• B) 0.41c
• C) 0.91c
• D) 0.55c

---

Definitions:

Mitochondrial Cristae

The inner membrane folds of mitochondria that increase the surface area for ATP production processes.

Preparatory Reaction

A phase in cellular respiration where pyruvate is converted into acetyl-CoA before entering the citric acid cycle.

Coenzyme A

A cofactor that plays a critical role in the synthesis and oxidation of fatty acids, as well as in the metabolism of carbohydrates and proteins.

Electron Transport Chain

A series of complexes that transfer electrons through a membrane within mitochondria to form a gradient used to produce ATP.