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katovenus [111]
3 years ago
14

In the beginning of wireless technology, some devices used _____ technology to "beam" information from one source to another sou

rce without the use of wired connections. a. ​air-compression b. ​xray c. ​gamma spectrum d. ​infrared
Computers and Technology
1 answer:
sveticcg [70]3 years ago
4 0

Answer:

D. infrared.

Explanation:

Wireless technology for communication uses electromagnetic wave to transmit signals between location. It eliminates the need of cables for connecting network devices.

In previous wireless technology implementation, Infrared rays were used (in tv remotes), which needed to be in the line of sight to its destination. Although it was fast, it has many limitations for a long-haul transmission like its short transmission range, easily blocked by objects and its uni-directional properties.

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What do the power key and refresh key do when pressed together
9966 [12]

Answer:

shuts down the laptop.

Explanation:

i just did it and almost had a heart attack because it wouldn't turn on

3 0
3 years ago
Create a cell reference in a format by typing in the cell name or
Neko [114]

Answer:

D. Create a cell reference in a formula by typing in the cell name or clicking the cell.

Further Explanation:

To create a cell reference in a formula the following procedure is used:

First, click on the cell where you want to add formula.

After that, in the formula bar assign the equal (=) sign.

Now, you have two options to reference one or more cells. Select a cell or range of cells that you want to reference. You can color code the cell references and borders to make it easier to work with it. Here, you can expand the cell selection or corner of the border.

Again, now define the name by typing in the cell and press F3 key to select the paste name box.

Finally, create a reference in any formula by pressing Ctrl+Shift+Enter.

6 0
3 years ago
How to make a slideshow out of pictures in a folder windows not fitting to screen?
weqwewe [10]

Answer:

Windows slideshow.

Explanation:

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One way of creating a slideshow is using the screensaver desktop option. There are other easy ways like the wallpaper option and using powerpoint presentation.

To using the screensaver option, go to windows settings and click on personalize, here, use can select a theme or a group of image files, click on a color theme and click apply.

8 0
3 years ago
The first computer was developed by the government to spy on communist activities. Please select the best answer from the choice
allsm [11]
The answer is False.

The first computer was not developed to spy on communist by the government. The first computer was announced in 1946, the ENIAC (Electronic Numerical Integrator and Computer). It was built for general purposes like solving large mathematical problems. The US Army designed the computer to  calculate the artillery firing tables.
3 0
3 years ago
The principle of time preference requries a larger payment in the future than the present. Which situation best illustrates this
gladu [14]
The answer is letter C.
3 0
3 years ago
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