Question

Estimation

Accepted Answer

Often it is useful to estimate an answer to a problem when the problem is very hard to calculate exactly.  Estimates are also a useful check on subsequent calculations.  Sometimes “order-of-magnitude” estimates are sufficient to decide a physical question

Front	Estimation
Back	Often it is useful to estimate an answer to a problem when the problem is very hard to calculate exactly. Estimates are also a useful check on subsequent calculations. Sometimes “order-of-magnitude” estimates are sufficient to decide a physical question

Problem Estimation Estimate Answer Hard Calculate Estimates Check