An Exam Paper Contains the Following Equation for Rocket Propulsion $( M + \Delta m ) v = M ( v + \Delta v ) + \Delta m \left( v + v _ { e } \right)$

question 73

Multiple Choice

An exam paper contains the following equation for rocket propulsion: $( M + \Delta m ) v = M ( v + \Delta v ) + \Delta m \left( v + v _ { e } \right)$ . The error in the equation is that,instead of (v + v_e) ,the velocity of the fuel relative to the ground should be

• A)-v_e.
• B)+v_e.
• C)v - v_e.
• D)v_e-0 v.
• E)2v_e.

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Definitions:

Times Interest Earned

A ratio that measures a company's ability to meet its interest payments on outstanding debt.