Which of the choices is not a statement or direct application of the second law of thermodynamics? There are no 100% efficient heat engines. Heat energy naturally transfers from a high temperature substance to a low temperature substance. The change in internal energy of a system can be found by combining the heat energy added to a system minus the work done by the system. All natural processes tend toward states of increased entropy.

Answer:

105 kg*m/s

Explanation:

p=mv

momentum=mass*velocity

momentum=15kg*7m/s

momentum=105kg*m/s

2.1 Given that channel A's carrier frequency (100 kHz) and the IF frequency are different, the lowest local oscillator frequency that might be utilised to demodulate the signal on that channel is 50 kHz (50 kHz).

2.2 The difference between the IF frequency and the channel B carrier frequency (150 kHz) determines the lowest local oscillator frequency that could be used to demodulate the signal on channel B. This frequency is 100 kHz (50 kHz).

2.3 The difference between the carrier frequency of channel A and the local oscillator frequency is zero if the local oscillator is set to 100 kHz. Thus, the envelope of the modulated signal in channel A will be represented by a DC voltage (zero frequency) at the mixer's output. The channel B transmission won't be demodulated.

2.4 The difference between the carrier frequencies of channel A and channel B, assuming the local oscillator is set to 125 kHz, is 25 kHz, while the difference between channel B's carrier frequency and the local oscillator frequency is -25 kHz. Hence, the demodulated signal from channel A (1 kHz sinusoid) and the modulated signal will both be present in the mixer's output.

2.5 The difference between the carrier frequency of channel B and the local oscillator frequency is zero if the local oscillator is set to 150 kHz. Thus, the envelope of the modulated signal in channel B will be represented by a DC voltage (zero frequency) at the mixer's output. The channel A transmission won't be demodulated.

to know more about "frequency "  at https://brainly.com/question/26754018

#SPJ4

Answer: the radius of the circular path is approximately 1637.58 meters.

Explanation:

The centripetal force acting on the airplane is provided by the component of the gravitational force that acts towards the center of the circular path. This component is given by:

F_c = m * g * tan(banking angle)

Where:

F_c is the centripetal force

m is the mass of the airplane

g is the acceleration due to gravity

tan(banking angle) is the tangent of the banking angle

Now, the centripetal force is also given by the formula:

F_c = (m * v^2) / r

Where:

v is the speed of the airplane

r is the radius of the circular path

Equating the two expressions for F_c, we get:

(m * g * tan(banking angle)) = (m * v^2) / r

Canceling out the mass (m) on both sides of the equation, we have:

g * tan(banking angle) = v^2 / r

Solving for r, we get:

r = (v^2) / (g * tan(banking angle))

Substituting the given values:

v = 400 km/h = 400,000 m/h

g = 9.8 m/s^2

banking angle = 20°

Converting the speed to m/s:

v = 400,000 m/h * (1/3600) h/s = 111.11 m/s

Converting the banking angle to radians:

banking angle = 20° * (π/180) rad/° = 0.3491 rad

Now, substituting the values into the formula:

r = (111.11^2) / (9.8 * tan(0.3491))

r ≈ 1637.58 meters

Therefore, the radius of the circular path is approximately 1637.58 meters.

(a) 2N rightward

For the center of mass to be stationary,

Net force = 0

SO, 2N rightward

(b) 2N rightward

For the center of mass to move with constant velocity

Net force = 0

So, 2N rightward

(c) greater than 2N rightward

For the center of mass to accelerate in rightward

Net force should be in rightward

So, greater than 2N rightward

A property of a body that is a measure of inertia is usually viewed as a measure of the amount of matter contained in the body that causes it to have weight in a gravitational field. Mass is a dimensionless quantity that describes the amount of matter in a particle or object.

The mass of an object is a measure of its inertial properties or the amount of matter it contains. The weight of an object is a measure of the force exerted on it by gravity, or the force required to support it. Mass can best be understood as the amount of matter present in an object or body. Everything around us has mass.

Learn more about A mass here:- https://brainly.com/question/19385703

#SPJ4

Explanation:

Given:

Diameter = 200 m

Radius, r = 200/2 = 100 m

Time taken, t = 30 seconds

Formula to be used:

Distance traveled, = circumference of circle = 2πr

Answer:

Putting all the values, we get

Distance traveled = 2πr

So, the distance traveled by Raju is 628.57 m.

Now, magnitude of the displacement,

At the end of 30 seconds, Raju will come to starting position or initial position, so displacement is zero.

The atomic number of an atom when the number of neutrons in the nucleus of that atom increases, it remains the same.

Learn more about atomic number refer to :

https://brainly.com/question/1805828

#SPJ1

A) The volumetric flow rate when pipe is horizontal ≈  6.57 * 10⁻⁸ m³/sec

B) The volumetric flow rate when pipe is bent 10° upwards ≈ 6.35 * 10⁻⁸ m³/s

C) The Volumetric flow rate when pipe is 15° downwards ≈ 6.07 * 10⁻⁸ m³/s

Given data :

P1 = 105 kPa

P2 = 192 kPa

Radius ( r ) = 2.5 cm / 2 = 0.0125 m

Δ x ( change in length ) = 20 m

μeo = 6.35 * 10² kg / m.s

The general equation to determine volumetric flow rate

Q = \(\frac{-\pi }{8u} (\frac{dP}{dx}) r^{4}\)  ------ ( 1 )

a) When the pipe is horizontal

ΔP = ( 192 - 105 ) = 87 kPa

Q =  π / 8  * 6.35 * 10² * ( \(\frac{87 * 10^{3} }{20}\) ) * 0.0125⁴

   ≈ 6.57 * 10 ⁻⁸ m³/sec

b) When the pipe is bent 10° up

ΔP = - P1 + P2 cos 10°

      = 84.08 kPa

insert value into equation ( 1 )

Q ≈  6.35 * 10⁻⁸ m³/s

c) When pipe is 15° downwards

ΔP =  P2 cos 15° - P1

    = 192 * cos 15° - 105

    = 192 * 0.9659 - 105  =  80.45 kPa

Insert value into equation ( 1 )

Q =  π / ( 8  * 6.35 * 10²)  *  4022.5  * 0.0125⁴

   = π / ( 5080 ) * 0.00009820556

   = 6.07 * 10⁻⁸ m³/s

Hence we can conclude that  The volumetric flow rate when pipe is horizontal ≈  6.57 * 10⁻⁸ m³/sec,  The volumetric flow rate when pipe is bent 10° upwards ≈ 6.35 * 10⁻⁸ m³/s,  The Volumetric flow rate when pipe is 15° downwards ≈ 6.07 * 10⁻⁸ m³/s

Learn more about Volumetric flow rate : https://brainly.in/question/252172

Answer:

9.6 Ω

Explanation:

Notice that this circuit is the same as the one shown in the attached image.

Then we calculate the parallel of R1 and R3 first:

Since R1 = 30 Ω and R2 = 20 Ω, the parallel equivalent of this is 12 Ω and this in series with R5 (4 Ω) is 16 Ω.

Now we calculate the parallel circuit of the three resistors

40 Ω, 60 Ω, and 16 Ω, which gives us: 9.6 Ω

The middle ear compensates through 1) the area ratio of the tympanic membrane to the oval window (about 17x) and 2) the ossicular lever action (about 1.3x).

A) Due to impedance mismatch, only a small fraction of sound energy enters the liquid (Z2) from air (Z1).

Transmission coefficient T = 4Z1Z2/(Z1+Z2)^2. Assuming Z1=1 (air) and Z2=3400 (water), T ≈ 0.001, meaning 0.1% sound energy enters the liquid, while 99.9% is reflected.

B) Loss in dB = 10*log10(1/T) ≈ 30 dB.

The middle ear compensates through 1) the area ratio of the tympanic membrane to the oval window (about 17x) and 2) the ossicular lever action (about 1.3x).

Combined, they provide 22x amplification (27 dB). Both mechanisms contribute significantly to compensate for the loss.

Read more about impedance here:

https://brainly.com/question/13134405

#SPJ1

Answer:

\(v = u + at \\ v = 10 + 9.81 \times 5 \\ v = 59.05m {s}^{ - 1} \)

Answer:

Explanation:

In the microscopic world of quantum mechanics, particles don't behave like familiar everyday objects. They can exist in multiple states simultaneously and behave as both particles and waves. When we try to measure or observe a particle, we typically use light or other particles to interact with it. However, this interaction can disturb the particle's state. Imagine trying to measure the position of an electron using light. Light consists of photons, and when photons interact with the electron, they transfer energy to it. This energy exchange causes the electron's position and momentum to become uncertain. The more precisely we try to measure its position, the more uncertain its momentum becomes, and vice versa. This is known as the Heisenberg uncertainty principle.

So, the act of observing a particle disturbs its state because the interaction between the observer and the particle affects its properties. The very act of measurement or observation introduces a level of uncertainty and alters the particle's behavior. It's important to note that this behavior is specific to the quantum world and doesn't directly translate to the macroscopic world we experience in our daily lives. Quantum mechanics operates at extremely small scales and involves probabilities and uncertainties that are not typically noticeable in our macroscopic observations.

Two objects are held close together. When they are released, they move toward one another. The conclusion is supported by this evidence is  the objects have opposite charges.

An electric charge is a physical property that causes matter to experience a force when in close proximity to other electrically charged matter. There are two types of electric charges: positive and negative. Protons, which are positively charged, and electrons, which are negatively charged, are subatomic particles that make up matter.

In general, the protons and neutrons in the nucleus of an atom have a net positive charge, while electrons, which orbit the nucleus, have a net negative charge. The charges of these subatomic particles are indicated by the symbols "p" for proton, "n" for neutron, and "e" for electron.

Know more about  electric charge   here:

https://brainly.com/question/23212561

#SPJ11

Answer:

Which individual or group had perhaps the most profound effect on establishing social work as a specialized practice

Explanation:

Answer:

60 kg m/s

Explanation:

F= Force = 6 N

m = Mass of object = 3 kg

u = Initial velocity = 15 m/s

t = Time = 10 s

v = Final velocity

\(\Delta p\) = Change in momentum

Force is given by

\(F=\dfrac{\Delta p}{t}\\\Rightarrow Ft=\Delta p\\\Rightarrow \Delta p=6\times 10\\\Rightarrow \Delta p=60\ \text{Ns}\)

The change in  momentum of the object is 60 kg m/s.

Answer:

i dond no can you put another question

The total kinetic energy of each wheel is; 45 J, and each wheel reaches a maximum height of approximately 2.3 meters.

The total kinetic energy of each wheel is the sum of the translational kinetic energy of the center of mass and the rotational kinetic energy due to the rolling motion. For each wheel, the translational kinetic energy is given by;

K_trans = (1/2)mv²

where m is mass of the wheel and v is linear speed of the center of mass, which is 6.0 m/s.

K_trans = (1/2)(2.0 kg)(6.0 m/s)² = 36 J

The rotational kinetic energy due to rolling motion is given by:

K_rot = (1/2)Iω²

where I is moment of inertia of the wheel and ω is angular velocity of the wheel, which is related to the linear speed by ω = v/R, where R is radius of the wheel.

For a solid disk rotating about its center, the moment of inertia is given by I = (1/2)mr², where r is radius of the disk.

K_rot = (1/2)(1/2)(2.0 kg)(0.5 m)²(6.0 m/s)/(0.5 m)²

= 9 J

Therefore, total kinetic energy of each wheel is;

K_total = K_trans + K_rot = 36 J + 9 J

= 45 J

When each wheel rolls or slides up the incline, its kinetic energy is gradually converted to potential energy due to the increase in height. At the maximum height reached, all the kinetic energy has been converted to potential energy.

The maximum height reached by each wheel can be found using the conservation of energy, which states that the total mechanical energy (kinetic energy + potential energy) of the wheel is constant, assuming no energy is lost to friction or other non-conservative forces.

At the maximum height, the kinetic energy is zero and the potential energy is equal to the initial kinetic energy;

mgh = K_total

where m is mass of the wheel, g is acceleration due to gravity, h is the maximum height reached, and K_total is the total kinetic energy of the wheel, which is 45 J.

Solving for h, we get;

h = K_total/(mg) = 45 J/(2.0 kg)(9.81 m/s²) ≈ 2.3 m

Therefore, each wheel reaches a maximum height of 2.3 meters.

To know more about kinetic energy here

https://brainly.com/question/15764612

#SPJ1

Answer:

nothing moves if anything other doesn't move it.

natural position of things is the resting

Explanation:

yeah that's it

Answer:

The book does not move because all the forces acting on the book are in equilibrium, creating a net force of zero magnitude on the book. Since the net force on the book is zero, this means that the book will remain in its present state of motion (which is that the book is motionless).

Explanation:

Newton's first law states that all body will remain in  their present state of motion unless acted upon by an external force. In order word, a moving body should continue moving forever, and a body at rest should remain like that forever, unless they are acted upon by a force to either cause them to stop stop or to start moving respectively.

Answer:

LOL PUEDO HABLAR CON

Explanation:

Answer:

Whats the anwser/????

Explanation:

Answer: a

Explanation:

Answer:

The  value  is  \(t  =29.2  \  s \)

Explanation:

From the question we are told that

Generally the average velocity of the train is mathematically represented as

          \(v  =  \frac{u +  v}{2}\)

substituting  82.4 km/h for  u and   16.4 km/h. for  v

       \(v  =  \frac{82.4 + 16.4}{2}\)

          \(v  =  49.4 \  km/h\)

Generally the time taken is mathematically represented as

     \(t  =  \frac{ L}{v}\)

substituting   49.4 \  km/h for  v and  \(4.00 * 10^2 \  m  =  0.400 \  km\)

         \(t  =  \frac{ 0.400}{49.4}\)

          \(t  = 0.00809 \  h \)

converting to seconds

         \(t  = 0.00809 * 3600  \)

          \(t  =29.2  \  s \)

Answer:

The distance is 22.45 cm.

Explanation:

Height of cylinder, H = 14 cm

depth of hole, h = 5 cm

The distance of landing of stream from the base of cylinder is

\(R = 2\sqrt{H(H-h)}\\\\R = 2\sqrt{14(14-5)}\\\\R = 22.45 cm\)

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

How do digital signals work?

An established or one that represents data as a step made up of discrete values is known as a digital signal. There is no noise produced by digital signals. Electronic signals sent as pulses are used to transmit digital signals to computers. These signals can be found in things like digital phones and computers.

Because digital signals are used to transport data to and from the cloud, it should be noted that videos are said to stream from the cloud to a computer without quality degradation.

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

To know more about Digital signals, check out:

https://brainly.com/question/28160561

#SPJ1

Answer:

one substance must dissolve in another

solution's temperature can increase, decrease or stay the same

1. exothermic is when temperature increases:

Disposable hand warmers have an exothermic reaction that, in essence, just creates:

rust!!!

handwarmers have:

iron powder, salt, water, an absorbent material, and activated carbon.

When its removed from its outer packaging:

oxygen drifts across the pouch’s permeable covering.

With salt & water present:

oxygen reacts with the iron powder inside to form (rust!) iron oxide (Fe2O3) and releases heat

2. endothermic is when temperature decreases

https://brainly.com/question/10905662

libretexts

cenacsorg

Answer:

A chlorinated swimming pool would be a homogenous mixture because chlorine and water diffuse through each other and cannot be separated out as distinct materials. It is impossible to separate the chlorine from water as they homogenously mix and cannot be separated into their pure forms.

Explanation:

The maximum height of the stone above the ground is 227.55 m.

The maximum height reached by the stone is calculated by applying the following kinematic equation.

H = u²sin²θ/2g

where;

Substitute the given parameters and solve for the maximum height reached by the stone.

H = (100² x (sin 30)²)/(2 x 9.8)

H = 127.55 m

Height of the stone above the ground = 127.55 m + 100 m = 227.55 m

Learn more about maximum height of projectile here: https://brainly.com/question/12870645

#SPJ1

Answer:

C. 28g of Li2O, because all mass must be conserved

Explanation:

my mom is a 8th grade science teacher lol.

Answer:

The speed of the freight car decreases.

Explanation:

According to the law of conservation of momentum indicates that for colliding in an isolated system, the total momentum pre and post collision is same for the two objects this is done because the momentum that one item has lost is same for the momentum that the other received

In the given situation, the freight car travels at constant speed along a frictionless railroad line. The top floor freight car is open. Then a huge load of coal is dumped inside the car.

Therefore the speed of the freight car decreased by applying the law of conservation of momentum i

Answer:

The tension of the string is 41.876 N

Explanation:

Given;

length of the string, L = 2.11 m

mass of the string, m = 19.5 g = 0.0195 kg

frequency of the wave, f = 440 Hz

wavelength, λ = 15.3 cm = 0.153 m

The velocity of the wave is given by;

v = fλ

v = 440 x 0.153

v = 67.32 m/s

Also the velocity of the wave is given by

\(v = \sqrt{\frac{T}{\mu} }\)

where;

μ is mass per unit length = 0.0195 / 2.11 = 0.00924 kg/m

T is the tension of the string

T = v²μ

T = (67.32)²(0.00924)

T = 41.876 N

Therefore, the tension of the string is 41.876 N