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
adoni [48]
3 years ago
12

Sound can travel through a medium, but it does not require a medium. a. True. b. False

Physics
1 answer:
attashe74 [19]3 years ago
7 0

That's false.  No medium = no sound.
You might be interested in
A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 836 N.
kotegsom [21]
<span>A= a=99/85.3 
B= a=-54/85.3 
C=The acceleration is smaller. 
</span>
7 0
3 years ago
A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stopwatch measures the stone's trajec
olga2289 [7]

Answer:

The height of the cliff is 90.60 meters.

Explanation:

It is given that,

Initial horizontal speed of the stone, u = 10 m/s

Initial vertical speed of the stone, u' = 0 (as there is no motion in vertical direction)

The time taken by the stone from the top of the cliff to the bottom to be 4.3 s, t = 4.3 s

Let h is the height of the cliff. Using the second equation of motion in vertical direction to find it. It is given by :

h=u't+\dfrac{1}{2}gt^2

h=\dfrac{1}{2}gt^2

h=\dfrac{1}{2}\times 9.8\times (4.3)^2

h = 90.60 meters

So, the height of the cliff is 90.60 meters. Hence, this is the required solution.

5 0
3 years ago
An ice skater has a moment of inertia of 5.0 kgm2 when her arms are outstretched. at this time she is spinning at 3.0 revolution
givi [52]
With arms outstretched,
Moment of inertia is I = 5.0 kg-m².
Rotational speed is ω = (3 rev/s)*(2π rad/rev) = 6π rad/s
The torque required is
T = Iω = (5.0 kg-m²)*(6π rad/s) = 30π 

Assume that the same torque drives the rotational motion at a moment of inertia of 2.0 kg-m².
If u = new rotational speed (rad/s), then
T = 2u = 30π
u = 15π rad/s
   = (15π rad/s)*(1 rev/2π rad)
   = 7.5 rev/s

Answer: 7.5  revolutions per second.

7 0
3 years ago
Find the pressure exerted by a 3000 N crate that has an area of 2m squared
ipn [44]
Pressure = Force/ Area = 3000/2 = 1500 pascal.
8 0
3 years ago
Which of the following statements describes an interaction between the geosphere and atmosphere?
german
B is the answer, I’m really good at this subject
8 0
3 years ago
Read 2 more answers
Other questions:
  • A +2.2 x 10-9 C charge is on the axis ar x= 1.5 m, a +5.4 x 10-9 C charge is on the x-axis at x= 2.0 m, and a+3.5 x 10-9 C charg
    7·1 answer
  • Whats the differnece between a series circuit and a parallel circuit<br><br>​
    13·1 answer
  • What evidence do we have that the halo population of stars are older than other stars in the galaxy?
    14·1 answer
  • A 75.0 kg ladder that is 3.00 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at
    9·1 answer
  • When you turn up the volume on a radio, which of the following change: velocity of sound, intensity, pitch, amplitude, frequency
    10·2 answers
  • SY19-
    8·1 answer
  • A football field lies so one endzone is to the east and one is to the west. A running back gets the ball and starts running 20o
    14·1 answer
  • Technician A says that low pressure smoke installed in the fuel system can be used to check for leaks. Technicians B says that n
    15·1 answer
  • How does this happen?
    12·1 answer
  • What happens to an object's mass as the object's acceleration increases but the force stays the same
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!