(a)
The average yearly rate at which the ice in the center of the glacier advanced.
(a)
Answer to Problem 1GST
The average yearly rate at which the ice in the center of the glacier advanced is
Explanation of Solution
Given info:
The number of years taken for the movement is
The expression for calculating the average yearly rate at which the glacier advanced in the center is as follows:
Substitute
(b)
The speed at which the glacier advances per day in the center.
(b)
Answer to Problem 1GST
The speed at which the glacier advances in the center per day is
Explanation of Solution
Given info:
From the above expression, the annual rate of movement of the glacier in the center is
The expression for calculating the speed at which the glacier advances in the center per day is as follows:
Substitute
(c)
The average rate at which the ice along the sides of the glacier moves forward.
(c)
Answer to Problem 1GST
The average rate at which the ice of the glacier moves forward along the sides is
Explanation of Solution
Given info:
The number of years taken for the movement is
The expression for calculating the average rate at which the glacier advanced along the sides is as follows:
Substitute
(d)
The reason for the difference between the rate of movement of the glacial ice in the center and along the sides.
(d)
Answer to Problem 1GST
The frictional drags cause the glacial ice to flow at a slower rate along the sides, whereas the central part is devoid of friction and can move at a faster rate.
Explanation of Solution
During the movement of glacial ice, the movement occurs both internally and externally. The frictional drag affects the external motion of the ice and it is more along the sides and at the bottom of the glacier.
The central part of the glacier escapes from the friction. This causes the central part of the glacial ice to advance forward at a faster rate than those along the sides, thus bringing difference in the rate of movement in the center and along the sides of the glacier.
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