Mike experiments with airplane designs. He wants to figure out what airspeed is needed to have enough lift for a small airplane. The total weight of the plane is 5000 newtons. If the total wing surface area is 50 square meters, at what speed will the plane have to be going to take Response off? Give your answer in Kilometers per har kad) SC.

The work required by the process is _____ kJ/kg.

The work required to compress water isentropically from 10°C and 81.4 percent quality to 3 MPa can be determined using steam tables. The first step is to locate the initial state of water at 10°C and 81.4 percent quality in the steam tables. From the tables, we find the specific enthalpy (h1) and specific entropy (s1) values for the given state.

Next, we find the specific enthalpy (h2) at the final state of 3 MPa from the steam tables.

Using the isentropic compression process, we assume that the entropy remains constant (s2 = s1).

The work required (W) can be calculated using the equation:

W = h1 - h2

Substituting the values obtained from the steam tables, we can find the work required per kilogram in kJ.

Steam tables provide a comprehensive set of data for water and steam properties, including enthalpy, entropy, and other thermodynamic parameters. These tables are essential for engineers and scientists working with steam and thermal systems. By utilizing steam tables, it becomes possible to accurately calculate various processes involving water and steam, such as compression, expansion, and phase changes. They are widely used in fields like power generation, HVAC systems, and industrial processes. Understanding and effectively utilizing steam tables are crucial skills for professionals in these domains.

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Water at 10°C and 81.4 percent quality, when compressed isentropically in a closed system to 3 MPa, requires a work of _______ kJ/kg.

The work required for this process can be determined by considering the initial and final states of the water percent quality and applying the principles of thermodynamics. At the given initial condition of 10°C and 81.4 percent quality, we can use steam tables to find the specific enthalpy and entropy values.

By applying the isentropic compression process, we can determine the final state of the water at a pressure o f 3 MPa. The difference in specific enthalpy between the initial and final states givesus the work required per unit mass.To calculate the specific enthalpy at te initial state, we use the steam tables to find the enthalpy of water at 10°C, which is h1. Similarly, the specific entropy at the initial state is obtained from the steam tables as s1.

By assuming an isentropic process, the specific entropy at the final state, s2, remains the same as s1. Using the final pressure of 3 MPa, we find the specific enthalpy of water at this state, h2, from the steam tables.

The work required per unit mass (w) cn be calculated using the equation:

w = h2 - h

Substituting the values obtained from the steam tables, we can determine the work required for this process in kJ/kg.

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If the electron starts off 2.90 mm from the positive plate, \(4.37*10^{-17}\)J work must be done on it to transport it to the negative plate.

The work done on the electron to move it a distance d  is found from

W=Fdcosθ

\(W=F(d-d_i)Cos0\)

\(W=F(d-d_i)\)

Substitute numerical values:

\(W=(1.8*10^{-14})*[(5.33-2.9)*10^{-3}]\)

\(W=4.37*10^{-17}J\)

To illustrate this concept, the work W is equal to the force f times the distance d, or W = fd. Work is done when a force is applied at an angle of to a displacement, or W = fd cosθ.

The total displacement of a force plus its component of force applied by an object in the direction of displacement is known as the force's work.

The negative plate in a lead acid cell is made out of a grid or lattice made of lead alloy with voids filled with chemically active lead sponge.

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The complete question is:

There are 5.33 mm between a pair of parallel plates that have opposing charges. There is a 600 V potential differential between the plates. How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.90 mm from the positive plate?

Answer:

it takes 64 J of heat energy to heat 2 kg of lead from 265 K to 315 K.

Explanation:

To find out how much heat is needed to heat 2 kg of lead from 265K to 315 K, we can use the formula for specific heat capacity, which is:

q = mcΔT

Where:

q = heat energy (in joules)

m = mass of the substance (in kilograms)

c = specific heat capacity of the substance (in joules per kilogram per degree Celsius)

ΔT = change in temperature (in degrees Celsius)

The specific heat capacity of lead is 0.128 J/g°C. we need to convert it to J/kg°C

So, the heat energy needed is:

q = (2 kg)(0.128 J/kg°C)(315 K - 265 K)

q = (2 kg)(0.128 J/kg°C)(50 K)

q = 64 J

Therefore, it takes 64 J of heat energy to heat 2 kg of lead from 265 K to 315 K.

The size of contact force from the ground is determined as 8000 N.

According to Newton's third law of motion, action and reaction are equal and opposite.

The size of contact force from the ground is equal to the weight of the rock and it is calculated as follows;

Fd = Fn

Fd = 8000 N

Thus, the size of contact force from the ground is determined as 8000 N.

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Answer:

a, Vì E0// AC

⇒UBC=UBA=120V

⇒UAB=−120V

Hình chiếu của AC lên E0=0

nên AC=0

E0=UBABA=1200,06.cos60=4000V

/m

Explanation:

Not sure but hope it helps

The electric potential at the free corner where there is no charge is 1.80 V. The charge that should be placed at the free corner for the electric potential at the center of the rectangle to be zero is 8.55 µC (positive).

(a) Electric potential at the free corner where there is no charge: The electric potential at the free corner can be determined by using the formula:

V=kq/r

where V is electric potential,

k is Coulomb's constant,

q is charge,

and r is the distance between the charge and the point where electric potential is calculated.

It can also be written as:

V=q/4πε

V=kq/4πεr,

where εo is the permittivity of free space.

Let's assume that the free corner is located at point A.

The distances from q1, q2, and q3 to point A are 1 cm, 1 cm, and 2 cm, respectively.

Also, the value of Coulomb's constant, k, is 8.99×109 N⋅m2/C2.

The value of εo is 8.85×10−12 C2/N⋅m2.

Therefore, the electric potentials due to q1, q2, and q3 at point A are:

V1=kq1/r1

=8.99×109(9.00×10−6)/0.01

=8.09 V

V2=kq2/r2

=8.99×109(−9.00×10−6)/0.01

=−8.09 V

V3=kq3/r3

=8.99×109(8.00×10−6)/0.02

=1.80 V

The electric potential at point A is the sum of the potentials due to all three charges:

VA=V1+V2+V3=8.09−8.09+1.80

=1.80 V

(b) Charge that should be placed at the free corner:If the electric potential at the center of the rectangle is zero, then the sum of the electric potentials due to all four charges must be zero.

Let's assume that the charge at the free corner is q4.

Then, we can write:

V1+V2+V3+V4=0

where V1, V2, and V3 are the potentials due to q1, q2, and q3, respectively, and V4 is the potential due to q4.

Substituting the values of q1, q2, and q3, and the distances between them and the free corner, we get:

8.99×109(9.00×10−6)/0.01−8.99×109(9.00×10−6)/0.01+8.99×109(8.00×10−6)/0.02+8.99×109q4/d = 0

where d is the distance between q4 and the center of the rectangle.

Solving for q4, we get:

q4=8.55 µC

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The force needed to give a car of mass 800 kg an acceleration of 2.0 ms-² is 1600N.

The force needed to push an object can be calculated by multiplying the mass of the object by its acceleration as follows:

Force = mass × acceleration

According to this question, a car of mass 800 kg has an acceleration of 2.0 ms−². The force is calculated as follows:

Force = 800kg × 2m/s²

Force = 1600N

Therefore, the force needed to give a car of mass 800 kg an acceleration of 2.0 ms-² is 1600N.

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Answer: true

Explanation:

A brass axle with a volume of 0.318 cm weighs 2.7g.

Mass in physics is a quantitative representation of inertia, a fundamental property of all matter. Essentially, it relates to a substance's resistance to shifting its direction or speed in reaction to the application of a force.

You would use a balance as the tool to determine mass. The classic balance depicted here could aid in your understanding of what mass is, though you might also use a measuring cylinder or a triple beam balance in the lab to measure mass.

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Answer: 32 centimeters is 12.5984 inches

Explanation:

For a process where T1 = 300K, P1 = 100 kPa, and where T2 = 500K, P2 = 650 kPa,  the change in entropy is mathematically given as

S1-S2=-0.0288KJ/Kgk

Generally, the equation for the entropy   is mathematically given as

S1-S2=mcp*lnt2-t1-Rlnt2/t1

Therefore

S1-S2=1+1.004*ln(500/300)-0.287*ln(650/100)

S1-S2=-0.0288KJ/Kgk

In conclusion, Entropy

S1-S2=-0.0288KJ/Kgk

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Complete Question

Air in a piston-cylinder assembly undergoes a process from state 1, where T1 = 300K, P1 = 100 kPa, to state 2, where T2 = 500K, P2 = 650 kPa. Using the ideal gas model for air, determine the change in entropy between the two states, in kJ/kg-K

The change in entropy between the two states, in a piston cylinder assembly, undergoes a process from state 1 where t1=300k is 2.36 kJ/kg K.

The change in entropy can be find out using the following formula,

\(S1-S2=s^oT_1-R\ln \dfrac{p_2}{p_1}\)

Here, (p1 and p2) are the pressure at state 1 and 2 and R is the gas constant. The value of R is,

R=(8.314/28.97).

Air in a piston-cylinder assembly undergoes a process from state 1, where T1 = 300 K, p1 = 100 kPa, to state 2. where T2 = 500 K, p2 = 650 kPa.

Put these values,

\(S_2-S_1=1.70203_1-\dfrac{8.314}{28.97}\ln \dfrac{10\text { bar}}{1\text { bar}}\\S_2-S_1=2.36\rm\; kJ/kg K\)

Thus, the change in entropy between the two states, in a piston cylinder assembly undergoes a process from state 1 where t1=300k is 2.36 kJ/kg K.

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Answer:

increase

decrease

Explanation:

using formula

Vt=mg/6πηr

so if m increases V increases

r is the denominator so if r increases V decreases

Answer:

Seismic waves

Think of earthquakes :)

Network modifiers are elements or compounds that can alter the network structure of a ceramic glass by breaking the covalent bonds and introducing ionic bonds. The addition of network modifiers can decrease the glass transition temperature (Tg) of a ceramic glass.

Network modifiers are elements or compounds that can alter the network structure of a ceramic glass by breaking the covalent bonds and introducing ionic bonds. The addition of network modifiers can decrease the glass transition temperature (Tg) of a ceramic glass. This is because the introduction of ionic bonds disrupts the continuous network of covalent bonds, which lowers the energy required for the molecules to move and transition from a solid-like state to a liquid-like state. Therefore, the more network modifiers added to a ceramic glass, the lower the Tg will be. Conversely, the removal of network modifiers or the addition of network formers (elements or compounds that enhance the network structure) will increase the Tg of a ceramic glass.

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The graph points are described below.

What is kinetic energy ?

The movement of an object or a subatomic particle exhibits the kinetic energy, often known as the energy of motion. Every atom and object in motion contains kinetic energy. Kinetic energy is present whenever something moves, such as when a person walks, a baseball soars through the air, a piece of food falls from a table, or a charged particle moves in an electric field.

What is potential energy ?

A sort of energy that can be stored but is reliant on the locations of various system components in relation to one another is known as potential energy. A spring gains potential energy when it is stretched or compressed.

P.E= 1/2Kn²

K.E = 1/2 mv²

since the sum will be always constant

At point A.E. is the maximum displacement and the minimum kinetic energy

At point C displacement is maximum so kinetic energy is maximum

At point, B, D it sum of both since displacement is just half of the maximum

so half of the P.E will be converted to K.E.

Therefore, graph points are described below.

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Answer:

Explanation:

a. The frequency increases.

b. The period increases.

c. The frequency stays the same.

d. The period stays the same

Answer: First runner has more kinetic energy

Explanation:

The formula for kinetic energy is defined to be:

\(KE=\frac{1}{2} mv^2\)

Plug in the value for each runner to get:

\(KE_1=0.5(46kg)(8m/s)^2=1472J\)

\(KE_2=0.5(92kg)(4m/s)^2=736J\)

Answer:

Explanation:

Based on the given hint, it appears that the question is related to the analysis of a physics experiment involving the relationship between velocity, distance, and acceleration due to gravity.

Given that the formula v² = 2ugd is being used, it suggests that the experiment involves dropping an object from a height d and measuring the distance it travels over time, as well as the final velocity it reaches. By plotting the squared velocity (v²) on the vertical axis and distance (d) on the horizontal axis, a straight line can be obtained with a slope of 2ug, where u is the coefficient of friction and g is the acceleration due to gravity.

However, without further information or data from the experiment, it is impossible to determine the specific value of the scale factor used.

A. The original temperature in Kelvin is 313 K.  B. After reducing the thermal energy by 40%, the new temperature in Kelvin would be 188 K. C. The new temperature in Celsius is -85.15° C

In thermodynamics, temperature is typically measured in Kelvin, which is equivalent to degrees Celsius plus 273.15. So, to convert the given temperature of 40°C to Kelvin, we add 273.15 to obtain the value of 313 K.

When the thermal energy of a gas is reduced, its temperature decreases. The decrease in thermal energy is directly proportional to the decrease in temperature, provided the volume and pressure remain constant.

In this case, the thermal energy is reduced by 40%, which means the temperature should also decrease by 40%.

To calculate the new temperature in Kelvin, we simply multiply the original temperature in Kelvin by 0.6 (1 - 0.4). This gives us a new temperature of 188 K.

Finally, to convert the new temperature in Kelvin to Celsius, we subtract 273.15 from the value obtained in part B, which gives us -85.15°C. The negative sign indicates that the gas has been cooled below the freezing point of water.

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Answer:

b: density decreases

e: volume increases

Explanation:

When the water changes to ice, there won't be a loss of water, so the mass will be the same. However the ice will occupy more space, so the volume will increase. Then, since density is the mass divided by the volume, if the volume increase and the mass stays the same, the density decreases.

So, the answers are:

b: density decreases

e: volume increases

Answer:

D.gravity

Explanation:

Answer:

charge to uspe bro +positive hi rhega

Answer:

30mph

Explanation:

7.5 miles / .25 hours = 30 mph

Answer:

Our kinetic energy becomes 4 times bigger

A blower door assembly is a device used to test the airtightness of buildings. It consists of a fan, a frame that fits into a doorway, and various instruments for measuring airflow and pressure.

One of the key components of a blower door assembly is a pressure measuring instrument, which is used to determine the difference in air pressure between the inside and outside of the building.

The pressure measuring instrument used in a blower door assembly is typically a manometer. A manometer is a device that measures pressure by comparing the pressure of a fluid, such as mercury or water, in a vertical column to a reference pressure. In a blower door assembly, the manometer is connected to hoses that are attached to the fan and the frame. The fan blows air out of the building, creating a pressure differential between the inside and outside. The manometer measures the pressure difference and displays it on a digital or analog readout.

The pressure measurement is an important aspect of the blower door test, as it can help identify areas where air leakage is occurring. By measuring the pressure difference between the inside and outside of the building, the blower door assembly can help identify areas where the air is escaping or entering the building. This information can be used to improve the energy efficiency of the building by sealing air leaks and reducing energy consumption.

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Answer: solute: sugar, coffee powder, salt, cocoa powder, liquid detergent, monosodium glutamate (vetsin).

solvent: cow's milk, water, fruit extract

Explanation:

A solution is a mixture that is made up of two or more substances including solute and solvent.

The solute is one which can be dissolved in a liquid part that is solvent. The solute can be liquid or solid. Solutes are sugar, salt, coffee powder, cocoa powder, liquid detergent, monosodium glutamate.

The solvent is one which dissolves in it solute particles or molecules. Solvent are cow's milk, water, and fruit extract.

The California sea lions communicate  is  option C: 0.375 to 3 meters.

To calculate the approximate wavelengths of sound with which the California sea lions communicate, we can use the formula:

Wavelength = Speed of Sound / Frequency

Given:

Speed of Sound in Sea Water = 1,500 m/s

Frequency Range = 500 Hz to 4,000 Hz

For the lower frequency of 500 Hz:

Wavelength = 1,500 m/s / 500 Hz = 3 meters

For the higher frequency of 4,000 Hz:

Wavelength = 1,500 m/s / 4,000 Hz = 0.375 meters

Therefore, the approximate wavelengths of sound with which the California sea lions communicate are approximately 0.375 to 3 meters.

So, the correct answer is option C: 0.375 to 3 meters.

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GREETINGS!

For Horizontal Distance formula is,

                               \(R = \frac{V_{o} ^2}{g} Sin2\) θ

where,

            R is range or horizontal distance

            \(V_{o}\) is initial velocity

            g is acceleration due to gravity

            θ is the angel it makes

so,

    by putting the initial velocity and EACH ANGEL that is given in the data,

we will get range respectively,

for 31 degree = 565m

for 89 degrees= 22m

for 17 degrees = 357.88m

for 49 degrees = 633.77m

for 40 degrees = 630.27m

for 78 degrees = 260.3 m

SO FROM SHORTEST TO LONGEST IS,

89 degrees i.e. 22m , 78 degrees i.e. 260.3 m, 17 degrees i.e. 357.88m, 40 degrees i.e. 630.27m, 49 degrees i.e. 633.77m

I HOPE IT HELPS YOU :)