Apple Company History and Products

The auditory canal (ear canal) is the tube that carries sound waves from the outer ear (pinna/ear flap) to the eardrum (tympanic membrane). The cochlea is in the inner ear, tympanum is another name for eardrum, and trachea is the windpipe.

Infrasound (or infra sound) refers to sound frequencies below the human hearing range (below 20 Hz). Ultrasound refers to frequencies above the human range (above 20,000 Hz). The prefix 'infra-' means below.

The standard range of human hearing is 20 Hz to 20,000 Hz (20 kHz). Option A is incorrect because it uses inconsistent units - 20000 KHz would actually mean 20,000,000 Hz (20 MHz), which is far beyond human hearing. Option B correctly uses Hz throughout the range.

Global warming is a well-documented phenomenon supported by extensive scientific evidence showing Earth's average surface temperature has increased significantly since the Industrial Revolution, primarily due to human activities that increase greenhouse gas concentrations in the atmosphere.

The Greenhouse Effect is a natural and essential process where certain gases in Earth's atmosphere trap heat from the sun, keeping the planet warm enough to sustain life. Human activities have intensified this effect, leading to enhanced global warming.

Water vapor is actually the most abundant greenhouse gas in Earth's atmosphere and is responsible for the majority of the natural greenhouse effect. However, in the context of human-caused climate change, carbon dioxide is the primary driver because it accumulates and remains in the atmosphere for centuries, whereas water vapor cycles through precipitation relatively quickly. This question appears to test knowledge of the natural greenhouse effect.

Over the last 100 years (approximately 1920-2020), temperatures in the United States have risen by less than 1°C on average. NASA and NOAA data indicate warming of approximately 1.0-1.2°C globally since pre-industrial times, with regional variations. The US has experienced warming consistent with but somewhat less than the global average.

Carbon dioxide currently makes up approximately 0.04% (420 ppm as of 2022) of Earth's atmosphere, which is less than 1/10th of 1%. This small percentage has a disproportionate effect on climate because CO2 is a potent greenhouse gas that has increased significantly from pre-industrial levels of about 280 ppm.

The statement is False. While coal-fired power plants do emit CO2 that contributes to climate change (which can stress forests through drought, pests, and disease), CO2 itself does not directly damage forests in the way that pollutants like sulfur dioxide (which causes acid rain) or ozone do. In fact, higher CO2 levels can stimulate plant growth in controlled conditions, though this benefit is outweighed by climate change impacts.

Apple Computer was founded on April 1, 1976 by Steve Jobs, Steve Wozniak, and Ronald Wayne. The April 1st date is famous as both the founding day and an April Fool's joke that turned into history. Option C correctly states 1 April 1976.

The Macintosh was launched in 1984 with the famous '1984' Super Bowl commercial directed by Ridley Scott. It introduced the graphical user interface to mass market computing. Option D correctly states 1984.

The first PowerBook was launched in 1991, revolutionizing laptop computing with its built-in trackball and palm rest. The PowerBook line became Apple's flagship laptop product throughout the 1990s. Option C correctly states 1991.

Apple Inc. is headquartered in Cupertino, California, in the heart of Silicon Valley. The company has been based there since its founding in 1976. The current Apple Park campus is located at 1 Apple Park Way.

Michael Scott served as Apple's CEO from 1977 to 1981, making him the CEO in 1980. He was hired by Mike Markkula to provide adult supervision to the young Steve Jobs and Steve Wozniak. Jobs would not become CEO until much later, in 1997.