PROBLEM
No 25
IF
THE DISTANCE BETWEEN
THE CENTRES OF
THE EARTH AND THE MOON IS 30 TIMES
THE DIAMETER OF
THE EARTH. CALCULATE
THE MOON’S H.P.
IF DIAMETER
IS 2X
RADIUS
IS X
DISTANCE BETWEEN CENTRES
60X
SIN
H.P. =
X
H.P. = 57.3’ ANS
PROBLEM
No 26
ASSUMING THE EARTH’S RADIUS TO BE 6373 KMS
AND THE HORIZONTAL PARALLAX OF MOON TO BE 58.0’. CALCULATE THE DISTANCE OF THE MOON FROM
THE EARTH
SIN
H.P. = AB
AC
SINE
0˚ 58’ = 6373
AC
AC = 6373
AC = 377755KMS ANS
PROBLEM
No 34
ASSUMING
THE V OF THE MOON TO BE A CONSTANT 11’,
CALCULTE THE LENGTH OF A LUNAR
DAY.
LUNAR
DAY:
TWO SUCCESSIVE TRANSITS OF
MOON OVER THE SAME MERIDIAN
GHA
MOON 1HR 14˚ 19.0’
CONSTANT V CORRN 11.0’
TOTAL
C. GHA 1 HR 14˚ 30.0’
1
HR ---------------------- 14˚
30.0’
1 LUNAR
DAY --------- 360˚
LUNAR
DAY = 360
14˚ 30’
LUNAR
DAY = 24H 49M 39S ANS
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