The heat loss from a boiler is to be held at a maximum of 900Btu/h ft2 of wall area. What thickness of asbestos (k= 0.10 Btu/h ft ℉) is required if the inner and outer surfaces of the insulation are to be 1600 and 500℉, respectively? Now if a 3-in.-thick layer of kaolin brick (k= 0.07 Btu/h ft ℉) is added to the outside of the asbestos, what heat flux will be result if the outside surface of the kaolin is 250℉? What will be the temperature at the interface between the asbestos and kaolin for this condition?

Answer:

The first law is that if no force acts on an object, its motion will not change. In the second law, the force acting on an object is equal to its mass and acceleration. The third law is that when two objects interact, they act on each other with equal magnitude and opposite forces.

Answer:

electric circuit............

which grade

The wavefunction ψ(x) = Axe^(-αx) satisfies the one-dimensional time independent Schrödinger equation with the potential term V(x) = -xq^2, where q = √(αℏ^2/m).

To show that the wavefunction ψ(x) = Axe^(-αx) satisfies the one-dimensional time independent Schrödinger equation, we need to verify if it satisfies the equation:

(-ℏ^2/2m) * (d^2ψ/dx^2) + V(x)ψ = Eψ

where V(x) = -xq^2. Let's substitute the wavefunction and potential term into the equation and simplify:

(-ℏ^2/2m) * (d^2(Axe^(-αx))/dx^2) + (-xq^2)(Axe^(-αx)) = E(Axe^(-αx))

Differentiating ψ(x) twice, we get:

(-ℏ^2/2m) * [(Ae^(-αx))(α^2x - 2α + 2α^2x^2 - 2αx)] + (-xq^2)(Axe^(-αx)) = E(Axe^(-αx))

Simplifying further, we have:

(Ae^(-αx)) * [(-ℏ^2/2m)(α^2x - 2α + 2α^2x^2 - 2αx) - xq^2] = E(Axe^(-αx))

Expanding and rearranging terms, we obtain:

(Ae^(-αx)) * [-ℏ^2α^2x + ℏ^2(2α - α^2x - 2α^2x^2) - 2mαx^2 - mα^2x^3 + xq^2] = E(Axe^(-αx))

Comparing the coefficients of similar powers of x on both sides, we can equate the terms and obtain a relationship between q and α:

-ℏ^2α^2 = Eq^2   ... (1)

By substituting α = ℏ^2/(2mq^2) into equation (1), we can verify that the relationship holds. Therefore, the wavefunction satisfies the one-dimensional time independent Schrödinger equation with the given potential term.

Learn more about Schrödinger equation

brainly.com/question/31642338

#SPJ11

Bumpers, collapsible frames, airbags, and seat belts are safety features in vehicles designed to protect occupants in the event of an accident.

Bumpers help absorb impact and minimize damage to the vehicle, collapsible frames absorb and distribute energy, airbags rapidly inflate to provide a cushioning effect, and seat belts restrain occupants and prevent them from being thrown forward. All of these safety features work together to enhance occupant safety during accidents.

Learn more about Bumpers, collapsible here:

https://brainly.com/question/28525009

#SPJ11

Explanation:

the wavelengths get shorter

Answer: Because The spectra provided evidence to explain why the sun's atmosphere is so much hotter than its surface. ... Clear evidence now suggests that the heating mechanism depends on regular, but intermittent explosive bursts of heat, rather than on continuous gradual heating.

Explanation:

In the given scenario, a new air compressor section for an advanced gas turbine engine is designed and built. The compressor is claimed to operate adiabatically with a pressure ratio of 30.Therefore, the correct answer is 815.2 K, which corresponds to the isentropic temperature at the compressor exit.

To calculate the isentropic temperature at the compressor exit, we can use the isentropic process equation for an ideal gas:

T2s / T1 = (P2 / P1)^((k-1)/k),

where T2s is the isentropic temperature at the compressor exit, T1 is the inlet temperature, P2 is the outlet pressure (which can be determined using the pressure ratio), P1 is the inlet pressure, and k is the specific heat ratio.

Given the pressure ratio of 30, the inlet temperature of 35 °C (308 K), and the inlet pressure of 100 kPa, we can calculate the isentropic temperature using the equation. Considering the specific heat ratio for air as 1.4, we find that the isentropic temperature at the compressor exit is approximately 815.2 K.

Learn more about isentropic temperature here:

https://brainly.com/question/30896816

#SPJ11

Answer:

Explanation:

6

Probability for X<20 for given probability distribution is 0.85.

Probability is concern with possibility. It is a branch of statistics which deals with the occurrence of a random event. Sum of probabilities for a particular event is one.  Probability has been introduced in statistics to predict how likely events are to happen. Probability means an extent to which something is likely to happen. To find the probability of a particular event to occur, firstly we must know the total number of possible outcomes. The distribution of probability for an event is called as probability distribution.

for example when a coin is tossed, it gives two possible outcomes Head and Tail. There is 50% of chance of getting Head or tail.

The Total probability is the sum of all the probabilities and it is always one.

In this problem Probability that x < 20,

P(x<20) = P(x<-10)+P(x<-5)+P(x<0)+P(x<5)+P(x<10)+P(x<15)

P(x<20) = 0.20+0.15+0.05+0.1+0.25+0.1 = 0.85

To know more about Probability :

https://brainly.com/question/30034780

#SPJ7.

Answer:

Option 3. The tennis ball began from rest and rolls at a rate of 14.7 m/s safer 1.5 seconds.

Explanation:

To know the the correct answer to the question, it is important that we know the definition of acceleration.

Acceleration can simply be defined as the rate of change of velocity with time. Mathematically, it is expressed as:

a = (v – u) /t

Where

a => acceleration

v => final velocity

u => Initial velocity

t => time

With the above information in mind, let us consider the options given in the question above to know which conform to the difinition of acceleration.

For Option 1,

We were told that the tennis ball has the following:

Distance = 4 m

Time = 1.5 s

This talks about the speed and not the acceleration.

Speed = distance / time

For Option 2,

We were only told about the average speed and nothing else.

For Option 3,

We were told that the tennis ball have the following:

Initial velocity (u) = 0 m/s

Final velocity (v) = 14.7 m/s

Time = 1.5 s

This talks about the acceleration.

a = (v – u) /t

For Option 4,

We were only told that the tennis rolls to the right at an average speed. This talks about the average velocity. We need more information like time to justify the acceleration.

From the above illustrations, option 3 gives the correct answer to the question.

Responder:

Explicación:

Se dice que el trabajo se realiza cuando una fuerza aplicada a un objeto hace que el objeto se mueva a través de una distancia. El trabajo realizado por un cuerpo se expresa mediante la fórmula;

Workdone = Fuerza * Distancia

Como Fuerza = masa * aceleración,

Workdone = masa * aceleración * distancia

Masa dada = 5.0kg, aceleración = 2.0m / s² d =?

Para obtener d, usaremos una de las leyes del movimiento,

d = ut + 1 / 2at²

u = 0 (ya que el cuerpo acelera desde el reposo) yt = 7.0s

d = 0 + 1/2 (2) (7) ²

d = 49m

Workdone = 5 * 2 * 49

Workdone = 490 Julios

Answer:

the inertia of an object

Answer:

E = mc² relation between mass and energy

Explanation:

hope it will help you :)

Answer:

It allows them to write better and more comprehensible research papers. As well as being able to communicate the relevance and impact of their ideas and discoveries.

Explanation:

Answer:

1a) Transverse wave.

1b) Ripples on the surface of water.

1c) See first attachment.

1d)  See below for explanation.

2a) Longitudinal wave.

2b) Sound waves.

2c) See second attachment.

2d)  See below for explanation.

Part 2) 54 m/s

Explanation:

a)  The wave in the picture is a transverse wave.

In transverse waves, the oscillations are at right angles to the direction of wave travel.

b)  A real world example of a transverse wave is ripples on the surface of water.

c)  See first attachment.

d)  The amplitude is the maximum displacement of a point of a wave from its resting position.  It is measured by calculating the difference in height between a crest and the resting position (mid-line).

a)  The wave in the picture is a longitudinal wave.

In longitudinal waves, the oscillations are parallel to the direction of wave travel.

b)  A real world example of a longitudinal wave is sound waves.

c)  See second attachment.

d)  The amplitude is the maximum displacement of a point of a wave from its resting position.  It is measured by calculating the distance between the particles in the areas where it is compressed.

Wave Speed

\(\large\boxed{v=f \lambda}\)

where:

Given values:

Substitute the given values into the formula and solve for speed:

\(\implies v=60.0 \times 0.90\)

\(\implies v=54\;\sf m/s\)

Therefore, the speed of the wave is 54 m/s.

Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

Answer:

compression

Explanation:

compression

Answer:

重力

Explanation:

这是正确的答案还是不是

We can determine whether a change is physical or chemical by analyzing the what type of change is occurred. The change in color or formation of new product is a chemical change.

A chemical change is a type of change which include the breaking or making of chemical bonds and the formation of new products which has properties different from the initial substances.

Phase changes, change in size, shape, dissolving, conductivity etc. are  physical changes. They do not involve any change in chemical bonds or the formation of new product.

The change in color indicates the formation of a new product. All the chemical reactions like the corrosion of metals reaction of metals with acids or water etc . are all chemical changes.

Find more on physical changes:

https://brainly.com/question/21509240

#SPJ1

Here, we are required to determine which chemical formula is the product of the reaction between CaO and C02 given that matter is neither created nor destroyed.

The chemical formula of the product of this reaction is ; CaCO3.

The law of conservation of mass is the basis for the balancing of equations of chemical reactions.

The law states that matter( which is the building block of mass) can neither be created nor destroyed.

Therefore, in a reaction where one molecule of calcium oxide, CaO, and one molecule of carbon dioxide, CO2, combine in a chemical reaction to form one substance;

The chemical formula of the product of this reaction is ; CaCO3.

Read more:

https://brainly.com/question/17882354

Answer:

All of these

Explanation:

The speed of the command module relative to earth just after the separation is  2585.4 km/h

Since we don't know the masses of the motor and the module, So considering the mass of the module M, and the mass of the motor  to be  4M and  v be the velocity of the motor

So, The total mass of the vehicle is 5M( in kg), before separation,the momentum of the vehicle is:

2600 * 5M = 13000 M kg-km/h.

since the velocity of the module will be v + 73. After the separation, the momentum of the motor is 4Mv, and the momentum of the module is

M(v + 73) = Mv + 73M.

therefore, The total momentum is 4MV + Mv + 73M = 5Mv + 73M.

which will be the same as the initial momentum.

So, it  gives us the equation :

13000 M = 5Mv + 73M

Dividing  both sides by M:

=>13000 = 5v + 73

=>12927 = 5v

=>2585.4= v

But v is the velocity of the motor, so we have to add 93 to get the velocity of the module, which is  2658.4

To know more  about velocity refer to  the  link https://brainly.com/question/18084516?referrer=searchResults.

#SPJ4

Since the electric field between the plates is constant, If the two plates are brought closer together, the potential difference between the two plates decreases

The relation between potential difference and the electric field is given by ΔV = E.d

Since the electric field is maintained constant, the potential difference is directly inversely proportional to the distance between the plates.

The potential difference between the plates will therefore likewise decrease if the distance between the plates is reduced, we will state in this case.

The energy required to move a unit charge, or one coulomb, from one point to the other in a circuit is measured as the potential difference between the two points. Potential difference is measured in volts or joules per coulomb.

Refer to more about the potential difference here

brainly.com/question/12198573

#SPJ4

Answer:

x J = (1500 kg)(29 m/s)(y m/s)

Explanation:

x J = (1500 kg)(29 m/s)(y m/s)

To know that a 1500 kg car is moving at 29 m/s is not enough.

The value of x depends on y. You’re missing a number of meters and a quantity of ‘per seconds’ somewhere in your problem statement and you need to find them in order to solve the problem

Answer:

They would be pointing in the same direction

Explanation:

If they were facing each other then it may seem like they are pointing in different directions they would still point the same way.

The radio station's broadcast wavelength. 299792458/95700000=3.133m . λ=\(\frac{3.10^{8}m/s }{95.90.10^{6}Hz }\) =3.38m

Frequency of a wave is defined as the total amount of waves generated in a second. Frequency is the measurement of the quantity of vibrations per second. As an example, consider the following: If five full waves are created in a second, their frequency is 5 hertz (Hz), or 5 cycles every second.

The two primary frequency distribution types utilized in data analysis are cumulative and relative frequency distributions. Both depend on incidence, which in descriptive and inferential statistics refers to how frequently a particular event happens within a particular data set.

To know more about Frequency visit:

https://brainly.com/question/5102661

#SPJ4

The planetary body with the fastest orbit is Mercury, and the one with the slowest orbit is Neptune.

There is a general pattern between orbital velocity and orbital radius known as Kepler's second law of planetary motion. According to this law, a planet sweeps out equal areas in equal times as it orbits the Sun. This implies that planets closer to the Sun have smaller orbital radii and must travel faster to cover the same area in the same amount of time.

The relationship between orbital velocity and orbital radius can be expressed as v ∝ 1/r, where v represents the orbital velocity and r denotes the orbital radius. This relationship shows that as the orbital radius increases, the orbital velocity decreases. In other words, planets farther from the Sun have slower orbital velocities compared to those closer to the Sun.

This pattern is consistent with observations in our solar system. The inner planets, such as Mercury, have smaller orbital radii and faster orbital velocities, while the outer planets, like Neptune, have larger orbital radii and slower orbital velocities.

To learn more about planetary body, Click here: brainly.com/question/32117026

#SPJ11

Time taken by the soccer ball in the air when we neglect the air resistance is 2.75s

projectile motion - It is the motion of an object which projected into the air  and moving under the gravity.

a soccer ball is kicked at an angle of 64° to the horizontal

initial speed = 15 m/s

Initial velocity in vertical direction is given as

\(V_{v} = V_{0}sin \theta\)

\(V_{v} = 15sin(64)\)

\(V_{v}\) = 15× 0.8987

    = 13.48m/s

time taken to reach the maximum height is given by

T =\(V_{v}\) /g

where

\(V_{v}\)  is the velocity

g is the gravity

Ball comes downward with the same speed

then that time period is given by.

2\(V_{v}\) /g

= 2× 13.48 /9.8

T = 2.75s

Time taken by the soccer ball in the air when we neglect the air resistance is 2.75s

To know more about projectile

https://brainly.com/question/14607185

#SPJ4

Answer:

decomposition reaction

Explanation:

decomposition reactions occurs when one substance breaks down, or decomposes, into two or more substances

Answer:

Explanation:

Important here is to know that due north is a 90 degree angle, due east is a 0 degree angle, and due south is a 270 degree angle. Then we find the x and y components of each part of this journey using the sin and cos of the angles multiplied by each magnitude:

\(A_x=100cos90\\A_x=0\\B_x=55cos0\\B_x=55\\C_x=12cos270\\C_x=55\)

Add them all together to get the x component of the resultant vector, V:

\(V_x=55\)

Do the same to find the y components of the part of this journey:

\(A_y=100sin90\\A_y=100\\B_y=55sin0\\B_y=0\\C_y=12sin270\\C_y=-12\)

Add them together to get the y component of the resultant vector, V:

\(V_y=88\)

One thing of import to note is that both of these components are positive, so the resultant angle lies in QI.

We find the final magnitude:

\(V_{mag}=\sqrt{55^2+88^2}\) and, rounding to 2 sig dig's as needed:

\(V_{mag}=\) 1.0 × 10² m; now for the direction:

\(\theta=tan^{-1}(\frac{88}{55})=\) 58°