Answer:
An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout.
Explanation:
For instance, a simple light switch opens and closes the circuit that connects a light to a power source. When you build a circuit, it's a good idea to disconnect the battery or other power source when the circuit is not in use.
There are three main reasons why people are concerned that cell phones (also known as “mobile” or “wireless” telephones) might have the potential to cause certain types of cancer or other health problems:
Cell phones emit radiofrequency energy (radio waves), a form of non-ionizing radiation, from their antennas. Tissues nearest to the antenna can absorb this energy.
The number of cell phone users has increased rapidly. As of December 2014, there were more than 327.5 million cell phone subscribers in the United States, according to the Cellular Telecommunications and Internet Association. This is a nearly threefold increase from the 110 million users in 2000. Globally, the number of subscriptions is estimated by the International Telecommunications Union to be 5 billion.
Over time, the number of cell phone calls per day, the length of each call, and the amount of time people use cell phones have increased. However, improvements in cell phone technology have resulted in devices that have lower power outputs than earlier models.
Answer: The following event shows an effect of human-led climate change in a tropical climate zone:
Higher temperatures cause drier conditions in the Amazon rain forest.
Explanation: The mean rise in the global temperature has directly resulted in the growing prevalence of loss of vegetation. This has, in turn, affected the average precipitation levels in the Amazon rain forest. Decreasing rains in the region have decreased the availability of the water making in reach negatives and it is thus intensifying drier conditions.
The main function of the <u>respiratory system is breathing</u>, a process that is also referred to as respiration. This
process allows the body to bring in oxygen and expel (get rid of) carbon dioxide. During respiration, oxygen travels
through the bloodstream and carbon dioxide is carried away.
Breathing air into your body is also necessary for <u>speaking</u>.
