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
dangina [55]
4 years ago
7

HELP?!

Physics
2 answers:
svetoff [14.1K]4 years ago
6 0

Answer is the highest temperature, so D

Higher temperatures allow for sound to move faster, since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second. This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.

Neat little fact: This is also why in the winter when there is snow on the ground, it seems more peaceful and quite. The snow absorbs the sound waves and the temperature makes them not travel as fast, getting more quite as they go.

sertanlavr [38]4 years ago
3 0
Sound will travel fastest in air at 15!
D is the correct answer
You might be interested in
A published hypothesis:
kow [346]

Answer:

should be tested by the scientific community

4 0
3 years ago
How are the ways in which the pluton and pegmatite minerals form similar?
Rasek [7]
There both minerals and there both
8 0
4 years ago
Hannah is very good at picking up differences in other people's mood and behavior. She has been rewarded for her ability to work
Elanso [62]
It's C. Most likely
5 0
4 years ago
Read 2 more answers
The system needs an ordinary friction-based brake to bring the train to a full stop. Explain why the magnetic brake is not very
BabaBlast [244]

Answer:

The slower the train is moving, the less are the changes of the magnetic flux, thus the eddy currents become weaker.

Explanation:

A magnetic brakes is not a very efficient way of braking when a train is moving slowly because at low speeds, the changes in the magnetic flux are very less and so it causes the eddy current to become weaker.

Let us find the drag force which is proportional to the velocity of two conducting plates.

The EMF that is induced in the eddy currents are : $E=v(B \times L)$

The force which is due to the induced magnetic field is, $F=l(L \times B)$

Therefore, $F=\frac{E}{R} \times (L \times B)$

                 $F=\frac{v(B \times L)}{R} \times (L \times B)$

Here, force is directly proportional to the velocity of the two conducting plates.

Therefore, we can say that when the speed of the train is low, the magnetic flux changes are less and thus the eddy currents are weaker.  

6 0
3 years ago
How does fabric softener help prevent static electricity?
algol13

Answer:

Dryer sheets stop static cling by absorbing static electricity formed by different fabrics during your dryer cycle. The fabric softeners that coat dryer sheets are positively charged ions to balance the electrons and ions that cause static cling, leaving you with soft clothes without the static.

Explanation:

3 0
2 years ago
Other questions:
  • What is the mani difference between kentic energy and potential energy
    8·1 answer
  • How would life on earth be different if earth’s axis were not tilted with respect to its orbit?
    5·2 answers
  • What would have the greatest gravitational pull on each other?
    6·1 answer
  • Describe two sources of earth's energy that are not produced
    5·1 answer
  • Does the car traveling the longest time always travel the greatest distance? Why or why not?
    10·1 answer
  • An electromagnetic wave traveling through space encounters an electron sitting at rest. Upon being hit by the wave, which way wi
    12·1 answer
  • If the sum of the external forces on an object is zero, then the sum of the external torques on it
    14·1 answer
  • Help plz lol I’ll you’ll get 10 points
    6·1 answer
  • A man is transporting a trolley of mass 6 Kg and having Kinetic energy of 40 J. Compute its Velocity with which he is running?
    9·2 answers
  • A particle moving along a straight line with constant acceleration has a velocity of 2.35 m/s at t=3.42 s, and a velocity of -8.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!