In the 17th century, Galileo proposed a hypothesis to explain how suction pumps work. Galileo's hypothesis was disproved, but later it helped Torricelli in the development of an instrument for measuring atmospheric pressure. How did Galileo's hypothesis MOST likely help with the development of this new technology?

The power source in a certain welding setup generates 3500w that is transferred to the low carbon steel work with a heat transfer factor of 0.85. the melting factor in the operation is 0.45. a continuous fillet weld is to be made with a cross-sectional area of 23 mm2 determine the travel speed at which the welding can be accomplished.