Engineering, 03.12.2019 22:31 MJKjmkp1
The following statements refer to vectors in rn (or rm/ with the standard inner product. mark each statement true or false. justify each answer. a. the length of every vector is a positive number. b. a vector v and its negative, , have equal lengths. c. the distance between u and v is ku vk. d. if r is any scalar, then krvk d rkvk. e. if two vectors are orthogonal, they are linearly independent. f. if x is orthogonal to both u and v, then x must be orthogonal to u v. g. if ku c vk2 d kuk2 c kvk2, then u and v are orthogonal. h. if ku vk2 d kuk2 c kvk2, then u and v are orthogonal. i. the orthogonal projection of y onto u is a scalar multiple of y. j. if a vector y coincides with its orthogonal projection onto a subspace w , then y is in w . k. the set of all vectors inrn orthogonal to one fixed vector is a subspace of rn. l. if w is a subspace of rn, then w
Answers: 2
Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Engineering, 04.07.2019 18:20
An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.
Answers: 3
Engineering, 04.07.2019 18:20
Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg
Answers: 2
The following statements refer to vectors in rn (or rm/ with the standard inner product. mark each s...
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