Constant pointer: When a pointer itself a constant such that value that pointer holds can be changed, whereas the address the pointer variable hold cannot be changed is called as a constant pointer. Usage of pointer parameters as constant pointers: When a function uses a pointer parameter, modifications are restricted for the value that is passed as argument. So, it is necessary to declare the pointer parameters as constant pointers using “const” keyword.

Question

A cylinder of diameter 10 cm rotates concentrically inside another hollow cylinder of inner diameter 10.1 cm. Both cylinders are 20 cm long and stand with their axis vertical. The annular space is filled with oil. If a torque of 100 kg cm is required to rotate the inner cylinder at 100 rpm, determine the viscosity of oil. Ans. μ= 29.82poise

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Chapter 9, Problem 12RQE

Program Plan Intro

Constant pointer:

When a pointer itself a constant such that value that pointer holds can be changed, whereas the address the pointer variable hold cannot be changed is called as a constant pointer.

Usage of pointer parameters as constant pointers:

When a function uses a pointer parameter, modifications are restricted for the value that is passed as argument. So, it is necessary to declare the pointer parameters as constant pointers using “const” keyword.

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