Radar is an object detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio waves or microwaves which bounce off any object in their path. In 1922 A. Hoyt Taylor and Leo C. Young, researchers working with the U.S. Navy invented Radar.

Correct Option: D

Radar is an object detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio waves or microwaves which bounce off any object in their path. In 1922 A. Hoyt Taylor and Leo C. Young, researchers working with the U.S. Navy invented Radar.

An automobile, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor. The term motorcar has also been used in the context of electrified rail systems to denote a car which functions as a small locomotive but also provides space for passengers and baggage. Although several other German engineers (including Gottlieb Daimler, Wilhelm Maybach, and Siegfried Marcus) were working on the problem at about the same time, Karl Benz generally is acknowledged as the inventor of the modern automobile. In 1879, Benz was granted a patent for his first engine, which had been designed in 1878. Many of his other inventions made the use of the internal combustion engine feasible for powering a vehicle.

Correct Option: D

An automobile, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor. The term motorcar has also been used in the context of electrified rail systems to denote a car which functions as a small locomotive but also provides space for passengers and baggage. Although several other German engineers (including Gottlieb Daimler, Wilhelm Maybach, and Siegfried Marcus) were working on the problem at about the same time, Karl Benz generally is acknowledged as the inventor of the modern automobile. In 1879, Benz was granted a patent for his first engine, which had been designed in 1878. Many of his other inventions made the use of the internal combustion engine feasible for powering a vehicle.

A laser is a device that emits light (electromagnetic radiation) through a process of optical amplification based on the stimulated emission of photons. On May 16, 1960, Theodore H. Maiman operated the first functioning laser, at Hughes Research Laboratories, Malibu, California, ahead of several research teams, including those of Townes, at Columbia University, Arthur Schawlow, at Bell Labs, and Gould, at the TRG (Technical Research Group) company.

Correct Option: C

A laser is a device that emits light (electromagnetic radiation) through a process of optical amplification based on the stimulated emission of photons. On May 16, 1960, Theodore H. Maiman operated the first functioning laser, at Hughes Research Laboratories, Malibu, California, ahead of several research teams, including those of Townes, at Columbia University, Arthur Schawlow, at Bell Labs, and Gould, at the TRG (Technical Research Group) company.

There are many claimants to the title of the first company to produce practical transistor radios, often it is attributed to Sony (originally Tokyo Telecommunications Engineering Corporation). A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Following their development in 1954 they became the most popular electronic communication device in history, with billions manufactured during the 1960s and 1970s. Their pocket size sparked a change in popular music listening habits, allowing people to listen to music anywhere they went.

Correct Option: A

There are many claimants to the title of the first company to produce practical transistor radios, often it is attributed to Sony (originally Tokyo Telecommunications Engineering Corporation). A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Following their development in 1954 they became the most popular electronic communication device in history, with billions manufactured during the 1960s and 1970s. Their pocket size sparked a change in popular music listening habits, allowing people to listen to music anywhere they went.

The invention of the first automatic car is more evolutionary than the result of a single invention. Frenchmen Louis-Rene Panhard and Emile Levassor are recognized for inventing the modern transmission in 1894, but it was Thomas J. Sturtevant of Boston, Mass., who designed the first automatic transmission in 1904. In 1938, General Motors developed the first line of cars to sport automatic transmission — Oldsmobiles that offered “Hydra-Matic drive.” The cars were introduced to the public in 1940. In 1941, Chrysler followed suit and introduced three different cars that offered their version of automatic drive, “Vacamatic” (later called “Fluid Drive”). Automatic transmission was a fairly common option on most American cars by 1948. Ford-O-Matic was the first automatic transmission widely used by Ford Motor Company.

Correct Option: B

The invention of the first automatic car is more evolutionary than the result of a single invention. Frenchmen Louis-Rene Panhard and Emile Levassor are recognized for inventing the modern transmission in 1894, but it was Thomas J. Sturtevant of Boston, Mass., who designed the first automatic transmission in 1904. In 1938, General Motors developed the first line of cars to sport automatic transmission — Oldsmobiles that offered “Hydra-Matic drive.” The cars were introduced to the public in 1940. In 1941, Chrysler followed suit and introduced three different cars that offered their version of automatic drive, “Vacamatic” (later called “Fluid Drive”). Automatic transmission was a fairly common option on most American cars by 1948. Ford-O-Matic was the first automatic transmission widely used by Ford Motor Company.