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
sattari [20]
3 years ago
6

When Lisa placed a balloon to her ear, she was able to hear what her sister was whispering from the other side of the room. When

she removed the balloon, she was no longer able to hear what her sister was saying. What is the best explanation for what Lisa discovered?
Physics
2 answers:
Aleks04 [339]3 years ago
5 0

Explanation :

Helium gas is present inside air balloon. Its density is less than air i.e. it is lighter than air.

The speed of sound in air is 343 m/s and around 972 m/s in He.

So, when Lisa placed a balloon to her ear, she was able to hear what her sister was whispering from the other side of the room because the sound waves are travelling with faster speed to Lisa.

When she removed the balloon, she was no longer able to hear what her sister was saying. It is because speed of sound in air is <em>343 m/s</em>.

kipiarov [429]3 years ago
4 0

Answer:

The answer is D

Explanation:

Sound does not travel around the air outside of the balloon as well as it does through the denser air pressure inside the balloon

You might be interested in
Which of the following experiments could be used to determine the inertial mass of a block? A. Place the block on a rough horizo
valentinak56 [21]

Answer:

D, using a spring scale to exert a force on the block. Measure the acceleration of the block and the applied force

Explanation:

For this you would use the net force equation acceleration=net force * mass however you will want to isolate mass so it would be acceleration/ net force to get mass. Then process of elimination comes to play.

3 0
3 years ago
If a 15 kg mass accelerates at a rate of 4 m/s2, what net force acts on it?
jarptica [38.1K]
<h2>Answer: D 60N</h2>

<h3>Explanation:</h3>

Mass(M)=15 kg

Acceleration(A)=4 m/s2

Force=?

Now,

Force(F)=M×A

F=15×4

F=60N Ans

5 0
3 years ago
What is the relationship between Hectare and cubic meter<br>​
kap26 [50]
Answer;

1 hectare meter is equal to 10000 cubic meter.

8 0
3 years ago
How large is the area of water found on Mars?
ehidna [41]

More than five million cubic kilometers of ice have been identified.


8 0
4 years ago
Read 2 more answers
Which equations could be used as is, or rearranged to calculate for frequency of a wave? Check all that apply.
amm1812
-- Equations  #2  and  #6  are both the same equation,
and are both correct.

-- If you divide each side by  'wavelength', you get Equation #4,
which is also correct.

-- If you divide each side by  'frequency', you get Equation #3,
which is also correct. 
With some work, you can rearrange this one and use it to calculate
frequency.

Summary:

-- Equations #2, #3, #4, and #6 are all correct statements,
and can be used to find frequency.

-- Equations #1 and #5 are incorrect statements.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Students perform an experiment in which they drop two eggs with equal mass from a balcony. In the first trial, the egg hits the
    5·2 answers
  • Newton
    10·1 answer
  • Small, slowly moving spherical particles experience a drag force given by Stokes' law: Fd = 6πηrv where r is the radius of the p
    11·1 answer
  • NEED HELP QUICK PLZ! 51 Points!
    13·2 answers
  • An alpha particle can be produced in certain radioactive decays of nuclei and consists of two protons and two neutrons. The part
    12·1 answer
  • ..Psychology Help Please!
    9·1 answer
  • Sound travels faster in ______ as compared to liquids.
    12·2 answers
  • What causes the movement of deep ocean currents?
    14·1 answer
  • A cellphone charger has a transformer with
    13·1 answer
  • irius, the brightest star in the sky, is 2.6 parsecs (8.6 light-years) from Earth, giving it a parallax of 0.379 arcseconds. Ano
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!