Machinist A says that cutting tools cannot be harder than the material machined Machinist B says that there must be relative motion between the work and cutting tools for chips to form.
Who is right?

pe = weightxheight = 2000x1000=2,000,000joules

so easy. just google the electromagnetic waves and it’ll pop up.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2