Whats the purpose of a needle valve on a welding tourch

You have a piece of 1045 steel 80 cm long and 30 cm wide and 15cm high. In this piece it is desired to make a groove along the 80 cm with a width of 8 cm with a depth of 10 cm.

Consider a large plane wall of thickness L = 0.3 m, thermal conductivity k = 2.5 W/m · °C, and surface area A = 12 m2.

Are spheroidized steels considered as composite? If so, what is the dispersed phase a) - No b) - Yes, Chromium Carbides c) - Yes, Iron Carbides d) - Yes, Intermetallic Compounds

A projectile is launched horizontally 1m above the ground. If it lands 300m away from the initial launch position, find: a) - the initial launch velocity, u, and b) - the angle 0, at which the projectile contacts the ground.

If a motor driven by PWM using half-bridge operation has a speed of 1,426 rpm at a duty cycle of 100% (full forward), what will its speed be at a duty cycle of 47%

Given an unsorted array of distinct positive integers A[1 ... n] in the range between 1 and 10000 and an integer i in the same range. Here n can be arbitrary large. You want to find out whether there are 2 elements of the array that add up to i.

A hydraulic power unit is sometimes referred to as a?

8.21 In the final stages of production, a pharmaceutical is sterilized by heating it from 25 to 75°C as it moves at 0.2 m/s through a straight thin-walled stainless steel tube of 12.7-mm diameter.

Which of the following can improve your car's gas mileage? A. Equipment racks B. Cargo carriers C. Sports team flags D. Car aerodynamics

Which of the following describes a logic bomb? a rogue piece of code in a system activates on a certain date a piece of code replaces the boot instructions the cookie tracker is exploited to note your browsing habits a piece of code hidden in a