Answer:
(1). social media
(2). wireless devices
(3). smart phones
Explanation:
The three technologies that have made global communication instant and more effective are social media, wireless devices, and smart phones.
Here,
Social media platforms have revolutionized the way people communicate globally. They allow individuals to connect, share information, and communicate with others in real-time, regardless of geographical location.
Wireless devices, such as laptops, tablets, and smartwatches, have eliminated the need for physical connections like cables and wires. They allow users to access the internet and communicate with others from virtually anywhere with a wireless signal.
Smartphones combine the features of a mobile phone with advanced computing capabilities. They provide instant communication through voice calls, text messages, emails, and various messaging apps.
Smartphones also allow users to access social media platforms and use wireless internet, making global communication more convenient and efficient.
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are used for mechanical power transmission over long distances
A. Spur Gears
B. Helical Gears
C. Planetary Gears
D. Chain and Sprockets
Answer:
D. Chain and Sprockets
Explanation:
Chains and sprockets are power transmission tools. The roller chain is connected to a toothed wheel which is the sprocket. The combination provides mechanical power to the wheels of vehicles.
An advantage they possess is their ability to transmit mechanical power over both short and long distances. They have a high degree of efficiency but they require constant lubrication. They also produce noise during operation.