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
Kruka [31]
3 years ago
5

Which of the following would not increase the velocity of a sound wave in air? A. lowering the humidity of the air. B. increasin

g the temperature of the air. C. increasing the wind speed in the direction the wave is traveling. D. lowering the density of the air
Physics
2 answers:
expeople1 [14]3 years ago
8 0

Answer:

Lowering the humidity of the air.

Explanation:

The mathematical formula for the speed of sound wave is given by :

v=\sqrt{\dfrac{\gamma RT}{M}}

Where

\gamma is the adiabatic constant

T is the temperature of air

M is the molecular mass of the gas

or

v=\sqrt{\dfrac{B}{\rho}}

B is the bulk modulus

\rho is the density of the air

As the humidity of the air increases, then the number of water molecules increase. As a result, molar mass decreases and ultimately the speed of sound increases and vice versa.

So, the correct option is (A) " lowering the humidity of the air ". Hence, this is the required solution.

Rashid [163]3 years ago
6 0
A. Lowering the humidity of the air.

Hope this helps!
You might be interested in
1 poir
djverab [1.8K]

Answer:

D) 735 J(oules)

Explanation:

Work is defined as force * distance

Force is defined as mass * acceleration

Given a mass of 15 kg and a gravitational acceleration of 9.8 m/s² since the box is being lifted up, the force being applied to the box is 15 kg * 9.8 m/s² = 147 N

Since the distance is 5 meters, the work done is 147 N * 5 m = 735 N/m = 735 J, making D the correct answer.

4 0
3 years ago
A person with mass mp = 76 kg stands on a spinning platform disk with a radius of R = 1.98 m and mass md = 191 kg. The disk is i
nalin [4]
<span>1.7 rad/s The key thing here is conservation of angular momentum. The system as a whole will retain the same angular momentum. The initial velocity is 1.7 rad/s. As the person walks closer to the center of the spinning disk, the speed will increase. But I'm not going to bother calculating by how much. Just remember the speed will increase. And then as the person walks back out to the rim to the same distance that the person originally started, the speed will decrease. But during the entire walk, the total angular momentum remained constant. And since the initial mass distribution matches the final mass distribution, the final angular speed will match the initial angular speed.</span>
3 0
3 years ago
Object 1 of mass m moves with speed v in the positive direction. Object 2 of mass 3 m moves with speed 4 v in the negative x-dir
Klio2033 [76]

Answer:

This means that the kinetic energy of second object is 48times that of the first object

Explanation:

Kinetic energy is the energy possessed by a body by virtue of its motion e.g motion of an accelerating car. Mathematically,

Kinetic energy = 1/2mv² where;

m is the mass of the object

v is the velocity of the object

If Object 1 of mass m moves with speed v in the positive direction, its kinetic energy will be expressed as;

K1 = 1/2mv²

For Object 2 of mass 3m moving with speed 4v in the negative x-direction, its kinetic energy can be expressed as;

K2 = 1/2(3m)(4v)²

K2 = 1/2(3m)(16v²)

K2 = (3m)(8v²)

K2 = 24mv²

To compare the kinetic energy of both bodies, we will take the ratio of K2:K1 to have;

K2/K1 = 24mv²/(1/2)mv²

K2/K1 = 24/(1/2)

K2/K1 = 48

K2 = 48K1

This means that the kinetic energy of second object is 48times that of the first object and moving in the negative x direction since the body of mass 3m initially moves in the negative x direction.

3 0
3 years ago
How many protons are in this atom if it has a balanced charge
Lerok [7]
It would be 20 protons left because 1-19= 20
7 0
2 years ago
Calculate the gravitational potential energy of a 1200 kg car at the top of a hill that is 42 m high.
GalinKa [24]
It IS <span>PE = (1200 kg)(9.8 m/s²)(42 m) = 493,920 J </span>
6 0
3 years ago
Other questions:
  • A meteoroid is traveling east through the atmosphere at 18. 3 km/s while descending at a rate of 11.5 km/s. What is its speed, i
    13·1 answer
  • If you could see the electric field coming off a proton you would notice that electric field lines are what?
    12·1 answer
  • The density of a substance is defined as its
    14·1 answer
  • A flat plate maintained at a temperature of 80°C experiences a flow of atmospheric air at 0°C. If the temperature gradient at th
    13·1 answer
  • A 2.44×104-kg rocket blasts off vertically from the earth's surface with a constant acceleration. During the motion considered i
    8·1 answer
  • A box is being dragged with a horizontal force of 65 N for 12 meters. If there is a force of friction acting on it
    12·1 answer
  • Calculate the average speed of a runner who runs for 500 meters in 40 second HELP!
    7·1 answer
  • HELP ME Please!!!!!!<br>Select ALL that apply
    13·1 answer
  • 3
    14·1 answer
  • Which of the following statements about waves are true? Select all that apply.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!