A rotating shaft of 30 mm in diameter is ground from AISI 1020 CD steel (UTS = 470 MPa). What is the modified endurance limit [MPa] (Se, NOT Se')? Consider only two modification factors: the surface modification factor (ka) and the size modification factor (kb). Ignore other modification factors.

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move

What is the answer to these problems 30 pt

Takumi works in his yard for 45 minutes each saturday. he works in the morning, and he wears sunscreen and a hat each time he works in the yard. what does takumi hope to reduce through his actions? the likelihood of stochastic effects, such as dna mutations the severity of stochastic effects, such as cancer the severity of non-stochastic effects, such as cancer the likelihood of non-stochastic effects, such as radiation sickness