Select one: a. Running an NC part program without touching the stock. Ob. The first time that a new NC part program is run. O O c. A graphical verification of an NC part program. d. The first check that you perform on an NC part program.

⦁ “God himself could not sink this ship” This is an advertisement for the Titanic, produced in the early 1900s. However, after colliding with an iceberg at dawn on April 15, 1912, two rivers were formed, and out of the 2,200 people on board, 1,500 people, including the captain, sank with the ship. According to a later investigation, the “temperature change theory” (DBTT theory) was the most promising cause of the sinking. Give a brief guess of the cause of the ship's sinking in relation to temperature.

a. There are plenty of things in the air you may want to remove-smoke, odors, pollen, allergens, etc. I’ll collectively refer to these as “dust” going forward. Typically, we aim to keep these levels low-in the μg/m3 range. Outdoor air may have 100–300 μg/m3, whereas we strive for much lower values indoors. To do that, we use air filters. A standard air filter is 4 in. (100 mm) thick, 20 x 25 in. cross section, D = 8 × 10-11 m2/s, with no dust in it when it’s new (Co = 0 kg/m3). Suppose the outdoor air has 100 μg/m3 of dust, whereas the indoor we want the indoor air to be less than 20 μg/m3. How long will it take (in years) for the far side of the filter to reach this value? (We will refer to this as the baseline case going forward).

You are watching a live concert. You can also find the concert streaming live on Spotify. About how far must you stand from the stage in order for the live concert and the live stream to be perfectly in sync? HINT: Assume the radio signal (Spotify) has to travel all the way around the Earth. circumference of the Earth (average): 40,041,000 m Speed of sound: 345 m/s Speed of light: 300,000,000 m/s