Traditional Culture Encyclopedia - Photography major - Appreciation of astronomical phenomena: For example, 1 is the process from the initial loss of the total lunar eclipse to the lunar eclipse, which was taken in Beijing from 2: 48 to 3: 52 on May 5, 20
Appreciation of astronomical phenomena: For example, 1 is the process from the initial loss of the total lunar eclipse to the lunar eclipse, which was taken in Beijing from 2: 48 to 3: 52 on May 5, 20
Appreciation of astronomical phenomena: For example, 1 is the process from the initial loss of the total lunar eclipse to the lunar eclipse, which was taken in Beijing from 2: 48 to 3: 52 on May 5, 2004. Solutions to mathematical problems
A: This time is 64 minutes from 2: 48 to 3: 52.
During this period, the distance of point P is 2r.
Point p moves at the speed of 2r64, that is, r32,
∴ At point P, the distance moved in t minutes is r32t,
∴OP=R+r-r32t(0≤t≤64).
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