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
dexar [7]
3 years ago
8

Why don't you hear a sound when you move your hand back and fourth through the air

Physics
2 answers:
kari74 [83]3 years ago
5 0
You can't move your hand fast enough, the lowest frequency sound is about 20 cycles per second, if you could move your hand that fast, you might hear sound.
inessss [21]3 years ago
3 0
Your hand is not capable of moving fast enough for sound to come out of it.
You might be interested in
Which example possesses mechanical potential energy?. A. a taut guitar string. B. an oscillating pendulum. C. a roller coaster r
NeTakaya
<span>
The taut guitar string haspotencial energy which we can see in action.</span>  <span>· so option a is correct.</span>
7 0
3 years ago
Read 2 more answers
A ball is thrown straight down with a speed of Va2.00 from a building 40.00 meters high. How much S time passes before the ball
-Dominant- [34]

Answer:

Option C is the correct answer.

Explanation:

Considering vertical motion of ball:-

Initial velocity, u =  2 m/s

Acceleration , a = 9.81 m/s²

Displacement, s = 40 m

We have equation of motion s= ut + 0.5 at²

Substituting

   s= ut + 0.5 at²

    40 = 2 x t + 0.5 x 9.81 x t²

   4.9t²  + 2t - 40 = 0

   t = 2.66 s   or t = -3.06 s

So, time is 2.66 s.

Option C is the correct answer.

6 0
3 years ago
The density of water is 1.00 g/cm3. What is its density in kg/m3?
r-ruslan [8.4K]
1 g = 1 ÷ 1000 kg
= 0.001 kg

1 cm³ = 1 ÷ 100 ÷ 100 ÷ 100 m³
= 0.000001 m³

1 g/cm³ = 1 g / 1 cm³
= 0.001 kg / 0.000001 m³
= 1000 kg/m³

The density is 1000 kg/m³.
3 0
2 years ago
Two aluminum soda cans are charged and repel each other, hanging motionless at an angle. which of the forces on the left can has
Sliva [168]
Assuming that the can is motionless, we can then assume that the vertical component of T = mg and that Fe = the horizontal component of T. 
<span> Since T itself is larger than it's vertical or horizontal components separately, then T is greater than all the forces.</span>
7 0
3 years ago
Read 2 more answers
A student standing on a knoll throws a snowball horizontally 4.5 meters above the level ground toward a smokestack 15 meters awa
Elan Coil [88]

Answer:

2.4 m

Explanation:

Consider the motion along the vertical direction

y_{o} = initial position of ball above the ground = 4.5 m

t = time taken by the ball to hit the smokestack = 0.65 s

v_{oy} = initial velocity of the ball along vertical direction

a_{y} = acceleration due to gravity = - 9.8 m/s²

y = position of ball at the time of hitting the smokestack

Using the kinematics equation

y = y_{o} + v_{oy} t + (0.5) a_{y} t^{2}

inserting the above values

y = 4.5 + (0) (0.65) + (0.5) (- 9.8) (0.65)^{2} \\y = 2.4 m

6 0
3 years ago
Other questions:
  • A block of density pb = 9.50 times 10^2 kg/m^3 floats face down in a fluid of density pt = 1.30 times 10^3 kg/m^3. The block has
    13·1 answer
  • All the bats living in a cave form a _______ of bats in the cave ecosystem.
    12·1 answer
  • A current of 1.8 A delivers 2.5 C of charge. How much time was required?
    15·2 answers
  • Scientists classify rocks by
    7·1 answer
  • Explain why do conductors and insulators are both required to construct electrical wiring in your home
    10·1 answer
  • arlene is to walk across a high wire strung horizontally between two buildings 10.0m apart. The sag in the rope when she is at t
    10·2 answers
  • As an airplane takes off, the air flows across the wings of the airplane. Which of the following would be the best description?
    10·1 answer
  • I NEED HELP THIS QUESTION IS SO HARDDD!!
    11·2 answers
  • A ball takes 10s to roll 40 m what is the average speed of the ball
    8·1 answer
  • A 1.2kg ball rolls forward with an acceleration of 1.11 m/s. What is the net force on the ball
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!