What is drone?
Drones, sometimes referred to as unmanned aerial vehicles (UAVs), carry out tasks that range from the mundane to the ultra-dangerous. These robot-like aircrafts can be found rescuing avalanche victims as well as dropping off groceries at your doorstep — and almost everywhere in between.
What is car?
A car or an automobile is a motor vehicle with wheels. Most definitions of cars say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people, not cargo.[1][2]
French inventor Nicolas-Joseph Cugnot built the first steam-powered road vehicle in 1769, while French-born-Swiss inventor François Isaac de Rivaz designed and constructed the first internal combustion powered automobile in 1808. The modern car—a practical, marketable automobile for everyday use—was invented in 1886, when German inventor Carl Benz patented his Benz Patent-Motorwagen. Commercial cars became widely available during the 20th century. One of the first cars affordable by the masses was the 1908 Model T, an American car manufactured by the Ford Motor Company. Cars were rapidly adopted in the US, where they replaced horse-drawn carriages.[3] In Europe and other parts of the world, demand for automobiles did not increase until after World War II.[4] The car is considered an essential part of the developed economy.
Cars have controls for driving, parking, passenger comfort, and a variety of lights. Over the decades, additional features and controls have been added to vehicles, making them progressively more complex. These include rear-reversing cameras, air conditioning, navigation systems, and in-car entertainment. Most cars in use in the early 2020s are propelled by an internal combustion engine, fuelled by the combustion of fossil fuels. Electric cars, which were invented early in the history of the car, became commercially available in the 2000s and are predicted to cost less to buy than gasoline cars before 2025.[5][6] The transition from fossil fuels to electric cars features prominently in most climate change mitigation scenarios,[7] such as Project Drawdown‘s 100 actionable solutions for climate change.[8]
There are costs and benefits to car use. The costs to the individual include acquiring the vehicle, interest payments (if the car is financed), repairs and maintenance, fuel, depreciation, driving time, parking fees, taxes, and insurance.[9] The costs to society include maintaining roads, land use, road congestion, air pollution, noise pollution, public health, and disposing of the vehicle at the end of its life. Traffic collisions are the largest cause of injury-related deaths worldwide.[10] Personal benefits include on-demand transportation, mobility, independence, and convenience.[11] Societal benefits include economic benefits, such as job and wealth creation from the automotive industry, transportation provision, societal well-being from leisure and travel opportunities, and revenue generation from taxes. People’s ability to move flexibly from place to place has far-reaching implications for the nature of societies.[12]
There are around one billion cars in use worldwide. Car usage is increasing rapidly, especially in China, India, and other newly industrialized countries.[13]
spring
Spring, also known as springtime, is one of the four temperate seasons, succeeding winter and preceding summer. There are various technical definitions of spring, but local usage of the term varies according to local climate, cultures and customs. When it is spring in the Northern Hemisphere, it is autumn in the Southern Hemisphere and vice versa. At the spring (or vernal) equinox, days and nights are approximately twelve hours long, with daytime length increasing and nighttime length decreasing as the season progresses until the Summer Solstice in June (Northern Hemisphere) and December (Southern Hemisphere).
bike
: BICYCLE
They watch a middle-aged man pedal by on his bike, the carrier filled to the brim with its own pile of collectables.—Joanne Ramondt
2
More than 100,000 motorcyclists are expected to descend on tiny Sturgis, S.D., this week for the annual Black Hills Motor Classic, the country’s biggest bike rally.—Newsweek
3
Yes, those are motorbikes racing around an ice track. No, that doesn’t mean you should take your motorbike out on some ice and ride as fast as you can. These ice racers are serious. They modify their bikes to perform on the slippery surface provided by the great Michigan outdoors.—Jessica Shepherd
4
It’s four in the morning and DeBartolo is already whirring away on the exercise bike. He’ll ride and read for 90 minutes without stopping, then hit the rowing machine, then the stair-climber.—Rick Reilly