1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
klasskru [66]
3 years ago
14

Select the correct answer. What is the SI unit of time?

Chemistry
2 answers:
photoshop1234 [79]3 years ago
7 0

Option A: second

SI units are international system of units. This is defined as a system of units of physical quantities such as mass, length, temperature, current etc. Some of the physical units are gram, meter, second etc. along with the set of prefixes which indicates the multiplication and division with some power of 10.

For same physical quantities, these units are inter convertible For example,

1 g=10^{-3}kg

and,

1 g=10^{3}mg

Here, g (gram), kg (kilogram) and mg (milligram) all are units of mass.

The units of time are second, minute, hour, day and year. Here, second is the SI unit and all the units are inter convertible as  follows:

1 year=365 days

1 day=24 hours

1 hour=60 minutes

1 minute-60 seconds

Thus, the SI unit of time is second.


Leni [432]3 years ago
5 0

Answer:

A. second

Explanation:

You might be interested in
Why atomic mass is an average vàlue​
lukranit [14]

Answer:

The atomic mass is the average number of protons and neutrons for all natural isotopes of an element. It is a decimal number.

Explanation:

Atomic Mass and Mass Number Example :

Hydrogen has three natural isotopes: 1H, 2H, and 3H. Each isotope has a different mass number.

1H has 1 proton. Its mass number is 1. 2H has 1 proton and 1 neutron. Its mass number is 2. 3H has 1 proton and 2 neutrons. Its mass number is 3. 99.98% of all hydrogen is 1H 0.018% of all hydrogen is 2H 0.002% of all hydrogen is 3H Together, they give a value of atomic mass of hydrogen equal to 1.0079 g/mol.

4 0
3 years ago
Read 2 more answers
10 POINT
MAVERICK [17]
the correct answer is B
8 0
3 years ago
Parts of the water cycle labeled A through C. A: water moving from a lake into the clouds. B: clouds. C: water falling from clou
erastovalidia [21]

Answer:

water evaporates from surfaces i think

Explanation:

5 0
3 years ago
Read 2 more answers
Which of these did your answer include?
sveticcg [70]

The oxygen atom has a partial negative charge and the Hydrogen atoms have a partial positive charge

8 0
3 years ago
All of the cells in the body need oxygen. Hemoglobin molecules in red blood cells transport oxygen through the bloodstream. Oxyg
tankabanditka [31]

Answer:

High partial pressure of oxygen in the tissues.

Explanation:

Hemoglobin is a protein found in the red blood cells that is responsible for the transportation of oxygen from the lungs to the rest of the tissues in the body. The partial pressure determines whether oxygen is loaded or unloaded into the hemoglobin.

When there is lack of oxygen in our bodies, we experience hypoxia.

6 0
3 years ago
Other questions:
  • Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.
    7·1 answer
  • Which statement correctly describes protons? They have no charge and are present in the nucleus of an atom. They have a negative
    14·2 answers
  • 30.) Use Percentages: According to the data in table above, what percentage of the energy used in the United States comes from f
    5·2 answers
  • How was the modern understanding of the atom developed?
    9·1 answer
  • An "arid" climate is very hot and dry.<br><br> True | False
    13·2 answers
  • How many moles are in 4.24kg of Na2CO3?
    6·1 answer
  • Who organized the periodic table?
    12·2 answers
  • You need 150g of pure lithium for an experiment you're doing. You have 675g of lithium oxide (Li2O). Can you extract all the lit
    14·1 answer
  • Plz help!!! This is timed!!!
    11·1 answer
  • COCI2 has an effusion rate of 0.00172 m/sec. Which of the gases below would have an effusion rate of 0.00323 m/sec?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!