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Which atom bond in atomic interaction combines electrons, filling its valence zone a) Van der Vaals bond; b) a covalent bond; c) ionic bond; d) metallic bond.

Some designers suggest that speech recognition should be used in a telephone menu system. This would allow users to interact with the system by speaking instead of pressing buttons on the dial pad.

Hot water (cph = 4188 J/kg·K) with a mass flow rate of 2.5 kg/s at 100°C enters a thin-walled concentric tube counterflow heat exchanger with a surface area of 23 m2 and an overall heat transfer coefficient of 1000 W/m2 ·K.

A student team is to design a human-powered submarine for a design competition. The overall length of the prototype submarine is 4.85 m, and its student designers hope that it can travel fully submerged through water at 0.440 m/s.

For each of the following cases choose a suitable system, if possible, and describe its boundaries and surroundings. Indicate if the work done (Wk) is positive, negative, or zero, and heat transfer (Q), if any, positive, negative or zero.

A digital-to-analog converter uses a reference voltage of 120 V dc and has eight binary digit precision. In one of the sampling instants, the data contained in the binary register = 01010101.

What is a perpetual motion machine of the second kind?

What happens when you turn a jack

Disconnecting means shall be capable of being locked in the open position. The provisions for locking do not have to reamin in place. A. True B. False

Generator belt that is glaze can prevent