Total Energy: an Electron Is Accelerated from Rest Through a Potential

question 46

Multiple Choice

Total energy: An electron is accelerated from rest through a potential difference of 50.0 kV. What is the TOTAL energy of the electron? (c = 3.00 × 10⁸ m/s, e = 1.60 × 10^-19 C, m_el = 9.11 × 10^-31 kg)

• A) 8.00 × 10^-15 J
• B) 16.2 × 10^-15 J
• C) 8.20 × 10^-14 J
• D) 9.00 × 10^-14 J
• E) 16.2 × 10^-14 J

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Definitions:

Variable Cost

Expenses that vary directly with levels of output or production volume.

Spending Variance

The difference between the actual amount spent and the budgeted amount in financial management, often analyzed in cost accounting.

Employee Salaries

The regular compensation paid to employees for their labor or services, typically expressed as an annual amount or hourly wage.

Activity Variance

The difference between the actual cost incurred for an activity and the standard cost set for that same activity.