If the De Broglie Wavelength of an Electron Is 2 $\left( m _ { \text {electron } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , \right.$

question 22

Multiple Choice

If the de Broglie wavelength of an electron is 2.4 ?m, what is the speed of the electron? $\left( m _ { \text {electron } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , \right.$ $\left. h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

• A)3.0 × 10² m/s
• B)2.5 × 10⁵ m/s
• C)1.7 × 10³ m/s
• D)8.3 × 10⁶ m/s

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Definitions:

Thymus

A gland located in the upper chest area that plays a crucial role in the development of the immune system in early life.

Lymphatic Organ

Structures part of the lymphatic system, such as lymph nodes, spleen, and thymus, that help defend the body against disease.

RBCs

stands for Red Blood Cells, which are cells in the blood that transport oxygen from the lungs to body tissues and carry carbon dioxide back to the lungs for exhalation.

Phagocytic Cells

Cells that have the ability to engulf and absorb bacteria, other foreign particles, and sometimes dead cells, as part of the immune response.