1. You will note that the values of a and [9 in Eq. (21.19b) are higher for high-speed steels than..

1. You will
note that the values of a and [9 in Eq. (21.19b) are higher for high-speed
steels than for carbides. Why is this so?

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2. As shown,
the percentage of the total cutting energy carried away by the chip increases
with increasing cutting speed. Why?