An Electron Is Projected Horizontally with a Speed of 5 $\times$

question 20

Multiple Choice

An electron is projected horizontally with a speed of 5.0 $\times$ 10⁶ m exactly in the middle of two parallel plates at potentials of -40 V and 104 V,respectively.The plate separation distance is 3.0 cm.The plates are long enough that the proton,rather than passing completely between the plates,eventually strikes the plate sitting at 104 V potential.What is the speed of the proton when it strikes the plate? The mass of the electron is 9.11 $\times$ 10^-31 kg.

• A) 8.7 \(\times\) 10⁶ m/s
• B) 7.1 \(\times\) 10⁶ m/s
• C) 6.0 \(\times\) 10⁶ m/s
• D) 5.0 \(\times\) 10⁶ m/s

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Definitions:

General Purpose Financial Reporting

Financial statements prepared to meet the information needs of various stakeholders not directly involved in managing the entity.

IASB

The International Accounting Standards Board, an independent body responsible for the development and publication of International Financial Reporting Standards (IFRS).

FASB

The Financial Accounting Standards Board, which is responsible for developing accounting standards in the United States.

Accounting Assumptions

The foundational principles that guide the preparation of financial statements, including going concern, accrual basis, and monetary unit assumptions.