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Georgia [21]
2 years ago
8

What is secondary storage device? give two examples ​

Chemistry
2 answers:
romanna [79]2 years ago
6 0

Answer:

refers to any non volatile storage device that is internal and external to the computer

aleksley [76]2 years ago
5 0

Explanation:

secondary storage devices are devices or memory stored externally to the computer.

Examples

Hard disk

Floppy disk

USB flash drive

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Help me please!!!!!!
pshichka [43]

Answer:???????????????????????? huh?

Explanation:

6 0
3 years ago
A person stands on the floor. What does Newton's third law say must happen
Gala2k [10]
The answer is A. Every action has an equal and opposite reaction
6 0
3 years ago
A woolly rhinocerous skeleton (Coelodonta antiquitatis) found in Poland contains 1.30% of the C-14 found in living animals. How
krok68 [10]

Answer:

The organism died 35900 years ago

Explanation:

  • Half life C-14 is 5730 years.
  • For decay of radioactive nuclides: \frac{N}{N_{0}}=(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}
  • \frac{N}{N_{0}} is the fraction of radioactive nuclide remain present after t time and t_{\frac{1}{2}} is the half-life of radioactive nuclide
  • Here \frac{N}{N_{0}} is 0.013 and t_{\frac{1}{2}} is 5730 yeras

Plug-in all the values in the above equation:

0.013=(\frac{1}{2})^{\frac{t}{5730years}}

So, t = 35900 years

Hence the organism died 35900 years ago

4 0
3 years ago
The conjugate acid of ch3nh2 is ________. the conjugate acid of ch3nh2 is ________. ch3nh2+ ch3nh2 ch3nh3+ ch3nh+ none of the ab
Verizon [17]
The conjugate acid of ch3nh2 is ch3nh3+<span>.
</span>For example methylamine in water chemical reaction: 
CH₃NH₂(aq)+ H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH⁻(aq).
According to  Bronsted-Lowry theory acid are donor of protons and bases are acceptors of protons (the hydrogen cation or H⁺). Methylamine (CH₃NH₂) is Bronsted base and it can accept proton and become conjugate acid (CH₃NH₃⁺).
3 0
3 years ago
What is the oxidation state of selenium in SeO3?​
ra1l [238]

Answer: The oxidation state of selenium in SeO3 is +6

Explanation:

SeO3 is the chemical formula for selenium trioxide.

- The oxidation state of SeO3 = 0 (since it is stable and with no charge)

- the oxidation number of oxygen (O) IN SeO3 is -2

- the oxidation state of selenium in SeO3 = Z (let unknown value be Z)

Hence, SeO3 = 0

Z + (-2 x 3) = 0

Z + (-6) = 0

Z - 6 = 0

Z = 0 + 6

Z = +6

Thus, the oxidation state of selenium in SeO3 is +6

8 0
3 years ago
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