Question 8 of 10
Which three statements describe mechanical waves?
A. The waves can travel through empty space.
B. The waves need matter to transfer energy.
C. The waves transfer energy by causing particles of matter to
move.
D. The waves can transfer energy through solids, liquids, and gases.

Please help!

Question 8 Of 10Which Three Statements Describe Mechanical Waves?A. The Waves Can Travel Through Empty

Answers

Answer 1

A. The waves can travel through empty space.

D. The waves can transfer energy through solids, liquids, and gases.

C. The waves transfer energy by causing particles of matter to move.

Mechanical waves are waves that require matter to transfer energy.

These waves transfer energy by causing particles of matter to move in the direction of the wave. This type of wave can travel through solids, liquids, and gases, but not through empty space.

There are two types of mechanical waves, longitudinal and transverse. Longitudinal waves are waves that travel in the same direction as the vibration of particles, while transverse waves travel perpendicular to the vibration of particles. An example of a longitudinal wave is a sound wave, while an example of a transverse wave is a water wave.

Mechanical waves are important to us as they are responsible for transferring energy through various mediums. For example, sound waves are propagated through the air and enable us to hear sound. This type of wave also transfers energy through solids, such as the vibrating strings of a guitar, and liquids, such as the waves of an ocean.

In conclusion, mechanical waves are waves that require matter to transfer energy and can transfer energy through solids, liquids, and gases. These waves travel in the same direction as the vibration of particles (longitudinal) or perpendicular to the vibration of particles (transverse). Mechanical waves are important to us as they transfer energy

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Related Questions

a 10.0-mf capacitor is fully charged across a 12.0-v bat- tery. the capacitor is then disconnected from the battery and connected across an initially uncharged capacitor with capacitance c. the resulting voltage across each capacitor is 3.00 v. what is the value of c?

Answers

The value of  uncharged capacitor in series with a 10.0-microfarad capacitor, given that each capacitor has a voltage of 3.00 volts, can be calculated using the formula for equivalent capacitance in series and  formula for charge on a capacitor. The value of c is approximately 4.00 microfarads.

To determine the value of c, which is [tex]1/Ceq = 1/C1 + 1/C2[/tex] . Initially, the 10.0-microfarad capacitor has a charge of [tex]Q = CV = (10.0 * 10^{-6 }F) * 12.0 V = 1.20 * 10^{-4} C[/tex].

When it is connected in series with uncharged capacitor with capacitance c,  charge is shared between the two capacitors. The charge on  10.0-microfarad capacitor is also equal to the charge on  uncharged capacitor, which is given by [tex]Q = (3.00 V) * C[/tex] .

Equating the two expressions for Q and solving for c, we get [tex]C = Q/3.00[/tex] [tex]V = (1.20 * 10^{-4 C}) / (3.00 V) = 4.00 * 10^{-5 F}[/tex]. Therefore,  value of c is approximately 4.00 microfarads.

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Why is momentum not conserved in real life situations

Answers

Momentum is not always conserved in real-life situations because external forces can act on a system and change its momentum.

For example, when two cars collide, friction and air resistance can cause the momentum of the system to change. Similarly, when a ball is thrown in the air, gravity and air resistance act on it and cause its momentum to change. Other factors such as deformation, energy loss, and imperfect collisions can also cause momentum to be lost or gained. Therefore, while momentum is a useful concept in physics, it is important to consider the impact of external factors when analyzing real-world situations.

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a tired worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet. the coefficients of static and kinetic friction are 0.6 and 0.4, respectively. the worker pushes with a force of 600 n. the frictional force exerted by the surface is

Answers

When a tired worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet, the frictional force exerted by the surface on the crate is 588 N.

When a tired worker pushes a heavy (100-kg) crate that is resting on a thick pile carpet, the frictional force exerted by the surface can be calculated as follows:

The weight of the crate = m × g = 100 kg × 9.8 m/s² = 980 N

Force applied by the worker = F = 600 N

The force of friction acting on the crate is given by the following formula:

Ff = μF

Where, μ is the coefficient of friction, F is the normal force acting on the crate.

Notes: The normal force is equal and opposite to the weight of the crate. i.e., N = 980 N1. The frictional force exerted by the surface on the crate is the static frictional force initially. Hence, we use the coefficient of static friction for our calculation.

2. If the force applied by the worker is not enough to overcome the static frictional force, then the crate will not move and the frictional force will remain static friction.

3. Once the crate starts moving, the static friction will convert to kinetic friction. Hence, we will use the coefficient of kinetic friction if the force applied by the worker is greater than the force of static friction. Initially, the force applied by the worker is less than the force of static friction, hence the frictional force exerted on the crate will be the static frictional force.

Frictional force = Ff = μN

The normal force acting on the crate = Weight of the crate = 980 N

Frictional force =

Ff = μN

= 0.6 × 980 N

= 588 N

Therefore, the frictional force exerted by the surface on the crate is 588 N.

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water flows through a pipe with a cross-sectional area of 0.002 m2 at a mass flow rate of 4 kg/s. the density of water is 1 000 kg/m3. determine its average velocity. multiple choice question. 20 m/s 200 m/s 0.02 m/s 2 m/s 0.2 m/s

Answers

Option D: 2 m/s is the average velocity of the water flowing through a pipe with a cross-sectional area of 0.002 m2 at a mass flow rate of 4 kg/s.

According to the question:

cross-sectional area of the pipe = 0.002m²

Mass flowrate = 4 kg/s

Density of water = 1000 kg/m³

We are asked to find, average velocity =?

Average velocity is the net or total displacement covered by a body in a given time. The mass flow rate divided by the pipe's cross-sectional area and density ratio is the formula for calculating a fluid's average velocity.

As a result, the water's average flow rate through the pipe is provided by:

v = m / (ρ × A)

where, v is the average velocity, m is the mass flow rate, ρ is the density of water, and A is the cross-sectional area of the pipe. Substituting the values in the above equation we get:

v = 4 / (1000 × 0.002)

v = 2m/s

Therefore, the average velocity of water flowing through a pipe of cross-sectional area of 0.002m² is 2m/s.

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Correct question is:

Water flows through a pipe with a cross-sectional area of 0.002 m2 at a mass flow rate of 4 kg/s. The density of water is 1 000 kg/m3. Determine its average velocity. Multiple choice question.

20 m/s

200 m/s

0.02 m/s

2 m/s

0.2 m/s

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