A high-speed cast iron bar 7.25 inch diameter is being machined on a lathe. The depth of cut is 0.031 inch and the spindle rotates at 550 RPM. The width of the cutting tool is 0.16 inch. The specific energy for machining high-speed cast iron is 1.62 HP. min/cubic-inch.

i. What is the cutting force (Fc)? 1 HP = 33000 ft. lbs/min
ii. If the friction angle is 37 degrees and the rake angle is 10 degrees, calculate the coefficient of friction.
iii. What is required cutting power in Horsepower? 1 HP = 33000 ft. lbs/min

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

wavelength divides in half and speed stays the same.