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
aleksandrvk [35]
3 years ago
5

Which of the following statements is true vibrations ?

Physics
1 answer:
Yuki888 [10]3 years ago
3 0

Answer:

<em>C. Neither ultrasonic nor infrasonic vibrations can be heard by humans.</em>

<em></em>

Explanation:

The complete question is

Which of the following statements is true of vibrations? A. The frequency of infrasonic vibrations is much too high to be heard by humans. B. Ultrasonic vibrations have a frequency lower than the range for normal hearing. C. Neither ultrasonic nor infrasonic vibrations can be heard by humans. D. Infrasonic vibrations are used in sonar equipment and to detect flaws in steel castings.

Ultrasonic vibrations have frequencies higher than our range of hearing, while infrasonic vibrations have frequencies lower than our range of hearing. Ultrasonic vibrations or sound is used in sonar equipment, and is used for detecting hidden flaws in steel castings and structures. Both infrasonic and ultrasonic fall below and above our normal hearing range respectively, and are only audible to dogs, cats, and some other mammals.

You might be interested in
What is four possible energy sources for a circuit
VashaNatasha [74]
<span>electric, solar, wind, and geothermal.</span>
8 0
3 years ago
Read 2 more answers
A helium-filled balloon is launched when the temperature at ground level is 27.8°c and the barometer reads 752 mmhg. if the ball
ololo11 [35]
The helium may be treated as an ideal gas, so that
(p*V)/T =constant
where
p = pressure
V = volume
T = temperature.

Note that
7.5006 x 10⁻³ mm Hg = 1 Pa
1 L = 10⁻³ m³

Given:
At ground level,
p₁ = 752 mm Hg
     = (752 mm Hg)/(7.5006 x 10⁻³ mm Hg/Pa)
     = 1.0026 x 10⁵ Pa
V₁ = 9.47 x 10⁴ L = (9.47 x 10⁴ L)*(10⁻³ m³/L)
     = 94.7 m³
T₁ = 27.8 °C = 27.8 + 273 K
     = 300.8 K

At 36 km height,
P₂ = 73 mm Hg = 73/7.5006 x 10⁻³ Pa
     = 9.7326 x 10³ Pa
T₂ = 235 K

If the volume at  36 km height is V₂, then
V₂ = (T₂/p₂)*(p₁/T₁)*V₁
     = (235/9.7326 x 10³)*(1.0026 x 10⁵/300.8)*94.7
     = 762.15 m³

Answer: 762.2 m³  
3 0
2 years ago
Lesson 11: electricity &amp; magnetism unit test physical science b unit 5: electricity and magnetism (connexus)
vovikov84 [41]

Electricity and magnetism can be considered as part of the same phenomenon because both are generated by electromagnetic forces.

<h3>What is electricity?</h3>

Electricity is the movement or flow of negatively charged electrons through a suitable conductor where a charge is applied.

Moreover, magnetism is a natural phenomenon caused by the generation/movement of electric charges.

In conclusion, electricity and magnetism can be considered as part of the same phenomenon because both are generated by electromagnetic forces.

Learn more on electricity and magnetism here:

brainly.com/question/25144822

#SPJ1

5 0
2 years ago
Static_______<br><br> sliding______<br><br> rolling_______<br><br> fluid_________
Arisa [49]

Answer:

a car

A sled sliding across snow or ice.

a ball down a hill

mercury

Explanation:

6 0
2 years ago
Read 2 more answers
A circuit is used in which process? A. electricity B. magnetism C. velocity D. gravity
umka2103 [35]

Answer:

Electricity

Explanation:

7 0
3 years ago
Other questions:
  • A ball is thrown straight up from a point 2 m above the ground. The ball reaches a maximum height of 3 m above its starting poin
    10·1 answer
  • A cylinder contains 250 L of hydrogen gas (H2) at 0.0^∘Cand a pressure of 10.0 atm. How much energy is required to raise the tem
    15·1 answer
  • All but one statement could describe a scientific theory. That is:
    10·2 answers
  • I drop an egg from a certain distance and it takes the egg 3.74 seconds to reach the ground. How high up was the egg?
    15·1 answer
  • 2. Find the velocity when the displacement is 40 m and the time is 5 s.
    5·1 answer
  • An object is moving at 2.50 m/s [E]. At a time 3.00 seconds later the object is traveling at 1.50 m/s
    11·1 answer
  • A 20 cm square frame that can rotate about the 00' axis is placed in a homogeneous magnetic field with 0.5T induction directed v
    15·1 answer
  • You have discovered and practiced the memory tools and study skills in this learning path.
    5·2 answers
  • What is air resistance means explain it with free falling body​
    10·1 answer
  • Please answer quickly
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!