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
love history [14]
3 years ago
5

Blimps were once filled with hydrogen, but now helium is used

Biology
1 answer:
rusak2 [61]3 years ago
6 0

Answer:

C.

Explanation:

Hydrogen's pure form is gas at room temperature. Helium is expensive. Hydrogen is lighter than helium.

You might be interested in
Since cynthia needs to obtain a replacement for olivia (who is having a baby and will be out for 12 weeks), what would be the ex
Makovka662 [10]
  The expected  first  choice  to locate  a  replacement  for Olivia  is    on temporary  help  agencies
       
                Explanation
Temporary   help  agencies   are  also   called assignment  employees.  This temporary help agencies  employ  people  and assign them  to perform  on a temporary  basic  for client of the agency. This employee have  the  same right  with  other  employees. Therefore this  is  best   choice to locate replacement  for  Olivia  for those 12  months.
5 0
3 years ago
What is the structure of the inferior vena cava
earnstyle [38]

Answer:

Structure. The IVC is formed by the joining of the left and right common iliac veins and brings collected blood into the right atrium of the heart. It also joins with the azygos vein (which runs on the right side of the vertebral column) and venous plexuses next to the spinal cord.

Source: common iliac vein; lumbar veins;

4 0
2 years ago
Which statements best describe gases
Neko [114]
Could you attach the statements so i can answer :)
5 0
3 years ago
1. Respiration takes place in the?<br><br>​
Yanka [14]

Answer:

lungs. that is why it is called respiratory system

Explanation:

3 0
2 years ago
Read 2 more answers
Identify one substance, other than the secretions from nerve cells, used in cell communication.
Verdich [7]
One substance, other than the secretions from nerve cells, that is used in cell communication are hormones.  
<span>
To add, <span>a hormone is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.</span></span>
8 0
3 years ago
Other questions:
  • Products and reactants in a balanced chemical reaction have the same number of _______ of each element.
    10·2 answers
  • During the spring, the male boogie bird engages in a stereotypic dance sequence whenever it sees a female. the female is best de
    14·1 answer
  • which enzyme is responsible for facilitating the placement and bonding between nucleotides in a new DNA molecule
    12·1 answer
  • Although both ends of a microtubule can gain or lose subunits, one end (called the plus end) polymerizes and depolymerizes at a
    5·1 answer
  • Fossils of a species of bird are found in layer 3. Which layer is most likely to have organisms that lived at the same time as t
    11·2 answers
  • A cell can pause in m phase at the: (pick one)
    5·1 answer
  • Cells that rely information gained from the environment
    15·1 answer
  • Like chordates, all invertebrates have
    10·1 answer
  • Which of the following has a closed circulatory system?
    15·2 answers
  • PLEASE HELP! - Describe why carbon, hydrogen, oxygen, nitrogen, &amp; other elements can combine. Describe the results of these
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!