How many nanoseconds does it take light to travel 1 km in a vacuum?
How many nanoseconds does it take light to travel 1 km in a vacuum?
Express your answer numerically in nanoseconds. t = s/v = 1500/(3×10^8) = 5 x 10^-6 sec = 5000 x 10^-9 sec = 5000 nanoseconds.
How many feet does light travel in a nanosecond?
0.98 feet
How long does it take a beam of light to travel 1 meter in a vacuum?
In 1983, the metre was redefined in the International System of Units (SI) as the distance travelled by light in vacuum in 1 / of a second….Speed of light.
| Sunlight takes about 8 minutes 17 seconds to travel the average distance from the surface of the Sun to the Earth. | |
| Exact values | |
|---|---|
| metres per second | /td> |
What is the 2 fastest thing in the world?
List of animals by speed
| Rank | Animal | Maximum speed |
|---|---|---|
| 1 | Peregrine falcon | 389 km/h (242 mph) 108 m/s (354 ft/s) |
| 2 | Golden eagle | 240–320 km/h (150–200 mph) 67–89 m/s (220–293 ft/s) |
| 3 | White-throated needletail swift | 169 km/h (105 mph) |
| 4 | Eurasian hobby | 160 km/h (100 mph) |
Is Time Machine already invented?
Time Travel Is Possible: Scientists Have Already Built A Time Machine, Actually. Time travel, a concept straight out of science fiction movies, is actually already happening, but not in the form of a plutonium-powered DeLorean jumping to the past and future. In fact, a time machine has already been built.
Can you build a time machine?
Travelling in time might sound like a flight of fancy, but some physicists think it might really be possible. BBC Horizon looked at some of the most promising ideas for turning this staple of science fiction into reality. Ron Mallett has a dream: He wants to travel in time.
Is time travel possible Ted?
Scientists love to argue about whether time travel to the past is possible. The short answer is that it probably isn’t. In any case it is a lot harder than going forwards in time. Some physicists have concocted an elaborate way that might one day achieve it, however.
How does a time machine work?
Time machines It is generally understood that traveling forward or back in time would require a device — a time machine — to take you there. Time machine research often involves bending space-time so far that time lines turn back on themselves to form a loop, technically known as a “closed time-like curve.”
What is a Mac time capsule?
The AirPort Time Capsule (originally named Time Capsule) is a wireless router which was sold by Apple Inc., featuring network-attached storage (NAS) and a residential gateway router, and is one of Apple’s AirPort products. They are, essentially, versions of the AirPort Extreme with an internal hard drive.
Does Apple still support time capsule?
Though this change includes the AirPort Express and AirPort Extreme, we are focusing on the AirPort Time Capsule because many of our clients use it as a backup storage device. With Apple no longer selling the device, consumers are left with a functional device that does not keep pace with networking technology.
Can I connect my time capsule directly to my computer?
Computers using AirPort or other compatible wireless cards or adapters can connect to the Internet through your Time Capsule. Computers connected to the Time Capsule Ethernet ports can also access the network and connect to the Internet.
What is the difference between Time Machine and Time Capsule?
To summarize, Time Machine is the Mac’s built-in backup software. Time Capsule is a network device sold by Apple that works with Time Machine, but does a lot more, too.
What does Apple Time Machine do?
With Time Machine, you can back up files on your Mac that weren’t part of the macOS installation, such as apps, music, photos, and documents. When Time Machine is turned on, it automatically backs up your Mac and performs hourly, daily, and weekly backups of your files.
How do I connect my Mac to my time capsule?
- Connect one side of an Ethernet cable to one of the Time Capsule’s three Ethernet ports to the right of the WAN port.
- Connect the other side of the Ethernet cable to the Ethernet port on your Mac.
Does Apple Time Machine work with any external hard drive?
Time Machine can back up to an external drive connected to a USB, Thunderbolt, or FireWire port on your Mac.
How do I backup my entire Mac to an external hard drive?
Select your storage device as the backup disk
- Open Time Machine preferences from the Time Machine menu in the menu bar. Or choose Apple menu > System Preferences, then click Time Machine.
- Click Select Backup Disk.
- Select your backup disk from the list of available disks.
What format should a Time Machine drive be?
If you plan to use your drive for Time Machine backups on a Mac, and you use only macOS, use HFS+ (Hierarchical File System Plus, or macOS Extended). A drive formatted this way will not mount on a Windows computer without additional software.
Can I backup two computers on the same external hard drive?
Any external drive can backup as many computers as there is space on the external drive, through any number of ways. Also, keep in mind that significant capacity may be needed to store all the files from the various computers, so be sure to purchase a drive large enough to handle your needs.
How can I share my external hard drive with another computer?
On the First Computer
- Connect the external hard drive to the computer and turn it on.
- Right-click the name of the external hard drive that you want to share and select “Properties.” Click the “Sharing” tab and select “Advanced Sharing.” Approve the User Account Control window if prompted.
Can two Macs share one Time Machine drive?
Answer: A: You do not need to re-partition the external drive. Time Machine will store its backups separately for each of your Macs. You can then have the MacBook configured to have Time Machine perform backups to this shared drive.
How do I backup Windows on an external hard drive?
Use File History to back up to an external drive or network location. Select Start > Settings > Update & Security > Backup > Add a drive , and then choose an external drive or network location for your backups.
What are the 3 types of backups?
In short, there are three main types of backup: full, incremental, and differential.
- Full backup. As the name suggests, this refers to the process of copying everything that is considered important and that must not be lost.
- Incremental backup.
- Differential backup.
- Where to store the backup.
- Conclusion.
What is the best way to backup your computer?
Experts recommend the 3-2-1 rule for backup: three copies of your data, two local (on different devices) and one off-site. For most people, this means the original data on your computer, a backup on an external hard drive, and another on a cloud backup service.
How do I backup my entire computer?
To backup your files using an external hard drive, you typically connect the drive to your computer or laptop with a USB cable. Once connected, you can choose individual files or folders to copy onto the external hard drive. In the event you lose a file or a folder, you can retrieve copies from the external hard drive.
Is a system image the same as a backup?
System images are complete backups of everything on your PC’s hard drive or a single partition. They allow you to take a snapshot of your entire drive, system files and all. There are sometimes good reasons to do this, but they shouldn’t be your regular backup strategy.