Give two examples of two-dimensional antennas. Describe them.
What will be an ideal response?
Examples include patch and satellite dish antennas. A satellite dish works like a signal collector, scooping up any signal that comes in a straight line with the center axis of the antenna. A patch antenna is usually a flat piece of metal, with different heights and widths, depending on the desired vertical and horizontal radiation angles. Another type of two-dimensional directional antenna is a horn antenna which resembles a large horn with the wide end bent to one side. These antennas are common in telephone networks and are used to transmit high-power microwave signals between two distant towers.
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A ____ is a document that describes how, in the event of a disaster, critical business functions continue at an alternate location while the organization recovers its ability to function at the primary site.
A. risk assessment plan B. business continuity plan C. incident response plan D. disaster recovery plan
45.5cm to inches
What will be an ideal response?
A ____ allows control of a high-current draw circuit by a very low current draw circuit.
A. relay B. capacitor C. logic gate D. processor
How can a confined space, such as a walk-in cooler or underground tunnel, become a safety hazard?
A) Electricity flows more readily in a confined space. B) Cell phones do not receive service in confined spaces. C) The oxygen is limited—long exposure can cause suffocation. D) The nitrogen can combine with carbon dioxide to form a toxic gas.