(b) F640H, Port B is F642H, Port C is F644H and Control register is F646H. Design the An 8255 PPI chip is attached to an 8086 microprocessor system. Port A is given as interface circuit. [10 marks]

Answer: Foods that naturally are nutrient-rich include fruits and vegetables. Lean meats, fish, whole grains, dairy, legumes, nuts, and seeds also are high in nutrients.

The type of element used to gather light in large astronomical telescopes is a primary mirror.

The primary mirror is typically a large concave mirror located at the bottom of the telescope's optical system. Its main function is to collect and focus incoming light from distant celestial objects. The large size of the primary mirror allows for the gathering of a significant amount of light, enhancing the telescope's ability to capture faint and distant objects in space. The collected light is then directed towards secondary mirrors and other optical components for further manipulation and analysis. The primary mirror plays a crucial role in the performance and light-gathering capability of large astronomical telescopes.

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Answer: c

Explanation:

I say "C" because we use technology to communicate over long distances instantly, so we have progressed in making rockets, shoes, health/high gene, etc.

          Technology is a branch of science which enables human life make easier with practical purposes. Technology improve human life in many way.  c,d ,e and f these all  improves human life by technology development.

Computers discovers new life to human life daily activities communication over the great distance , research and acess tons of information at fingertips. Computer has open source and cheap. Airplanes wipes the travel barrier for longer distance. We can travel longer distances with in hours.

Discovery of nearby galaxies gives lot of information about our galaxy shapes and nature of universe. One of best invention in human history is medical diagnostics, which enables human to detect diseases at early stages give better treatment to save life.

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According to Table 310-15(a)(16) of the National Electrical Code (NEC), the ampacity of No. 8 THHN conductors for a temperature of 50°F is 50 amperes.

However, the ampacity of the conductors depends on other factors as well, such as the length of the conductors, the type of insulation used, the number of conductors in the conduit, and the ambient temperature of the location where the conductors are installed. It is important to properly size the conductors based on all these factors to ensure safe and efficient operation of the electrical system.

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1. Five major external forces that affect organizations are economic, social, cultural, demographic, and technological. Economic factors such as inflation and interest rates can impact a company's profitability and purchasing power. Social factors like changing consumer preferences and lifestyles can influence demand for products and services.

Cultural factors like values and beliefs can shape consumer behavior and market trends. Demographic factors such as population size and age distribution can affect target markets.

Technological factors like advancements in automation or digitalization can disrupt industries and create new opportunities. These external forces shape the business environment and organizations must monitor and adapt to them to stay competitive.

2. Gathering competitive intelligence is crucial for businesses because it provides valuable insights about their competitors' strategies, strengths, weaknesses, and market position.

By understanding the competitive landscape, businesses can identify opportunities and threats, make informed decisions, and develop effective strategies.

Competitive intelligence helps businesses stay ahead of their competitors, anticipate market trends, identify emerging technologies, and improve their own products or services. It allows businesses to benchmark their performance, evaluate their competitive advantage, and identify areas for improvement.

Ultimately, gathering competitive intelligence empowers businesses to make proactive and strategic decisions that can lead to sustainable growth and competitive advantage.

3. In business, various economic variables need to be monitored as they have significant impacts on strategy applications. Some important economic variables include GDP (Gross Domestic Product), inflation rate, exchange rates, interest rates, consumer spending, unemployment rate, and industry-specific factors like raw material prices or energy costs.

Monitoring these variables helps businesses understand the overall economic conditions, identify market opportunities, and assess potential risks. For example, a high inflation rate may impact pricing strategies, while a favorable exchange rate can benefit export-oriented businesses.

By monitoring economic variables, businesses can adapt their strategies accordingly and make informed decisions to navigate the dynamic business environment.

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Answer:

When light passes from a less dense to a more dense substance, (for example passing from air into water), the light is refracted (or bent) towards the normal. The normal is a line perpendicular (forming a 90 degree angle) to the boundary between the two substances)

Explanation:

So I think it's B

Answer:

 the light is refracted (or bent) towards the normal

Answer:

False

Explanation:

The formula of force that exists between two charges is expressed as;

F = kq1q2/r²

If two charges separated by one meter exert a 9 N force on each other, the;

9 = kq1q2/1²

9 = kq1q2 ..... 1

If the charges are pushed to a 3 meter separation, then;

F =  kq1q2/3²

F =  kq1q2/9 .... 2

Divide both equations;

9/F = (kq1q2)/ kq1q2/9

9/F =  kq1q2 * 9/ kq1q2

9/F = 9

F = 9/9

F = 1N

Hence if the charges are pushed to a 3 meter separation, then the force on EACH charge will be 1N. Hence the answer is False

Answer:

The answer is Radiation.

Explaination:

A and B are wrong because you can't have convection or convection currents without air, and all the air has been removed from the box.

D is wrong because there is no liquid in the box.

C is correct because heat can be transmitted even through a vacuum by radiation (e.g., the Sun). You can quickly feel the heat radiated by a piece of white-hot iron.

Answer:

R = K L / A        resistance proportional to length and inversely proportional  

to area

R2 / R1 = A1 / A2 = A1 /  (4 A1) = 1 / 4

R2 = R1! / 4

The sun will become a red giant but it will not be a problem for humanity because the Earth will become inhabitable before that.

As per the research conducted it is said that the sun will eventually become a red giant and it engulf our planet Earth. The Earth will become extremely giant. This in turn will not become a problem for humanity, flora and fauna as the Earth will be completely inhabitable. All the forms of life will completely perish and no life form will exist. The planet will be engulfed by the red giant Sun. This is the reason it is not a problem for humanity.

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A monochromatic laser is responsible for exciting hydrogen atoms from their n=2 state to their n=5 state in which :

wavelength λ of the laser =435 nm

longest wavelength = λmax = 4052 nm

shortest wavelength = λmin= 95 nm

To do excitation, the energy of the laser should be greater than or equal to the energy of transition of the hydrogen atom.

In this case, the states of energy are explained by the Bohr model.

       En = -  13,606 /n²    [eV]

therefore the energy of the transition is

         ΔE  =  E 5 -  E2

         ΔE  =  13.606  (1  n2^2  -  1  n5^5 )

        ΔE  =  13.606(1 /2^2   -  1 /5^5).

        ΔE =    2,85726 eV

Using the Planck's equation

         E   =   h f

  Light’s relation to wavelength and frequencies

       c = λ f

       f = c /λ

  λ = h c / E

reducing energy to the SI system

     E  =  2,85726  eV    (1.6x10⁻¹⁹  J /1 eV)   =   4.5716 x 10⁻¹⁹   J

hence,  λ =  6,626 x 10⁻³⁴  3 x 10⁸ /4  ,5716 x 10⁻¹⁹

      λ   = 4.348x 10⁺⁷ m (10⁹ nm / 1 m)

      λ   = 435   nm

photon emission [e] , to the base state n = 1,  from n = 5.

Initial  state,  n = 5

final  state,    n = 4

ΔE = 13.606 (1/4² - 1/5²)

ΔE = 0.306 eV

λ =h c / E

λ = 4052  nm

n = 5

final /  level          ΔE (eV)     λ (nm)

  4                 0.306      4052

  3               0.9675     1281

  2                 2,857       435

  1               13.06           95

 n = 4

 3                 0.661        1876

 2                                    2,551         486

 1                 11,905       104

n = 3

 2                1.89            656

 1                                 12.09         102.5

n = 2

1                 10.20         121.6.

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Answer:

3.766 kg or 3.7 kg

Explanation:

F= M*A equation

Answer:

± .55 kg

Explanation:

55  * 1% = .55 kg

± .55 kg

Answer: Use the x/t = v formula!!! x is distance, t is time, and v is velocity. you just need to do 40 / 5 = 8 and 100 / 15 = 6.66

Answer:

\(\huge\boxed{\sf W = 30,000\ kJ}\)

Explanation:

Power = P = 15 kW = 15,000 W

Average speed = v = 54 km/h = 15 m/s

Distance = d = 30 km = 30,000 m

Work = w = ?

1) P = Fv

2) W = Fd

First, we need to find F(Force).

Using formula:

P = Fv

Put the given data

\(15000 = F \times 15\\\\Divide \ both \ sides\ by \ 15\\\\15000/15 = F\\\\1000 = F\\\\F = 1000 \ N\)

Now,

W = F × d

W = 1000 × 30,000

W = 30,000,000 Joules

\(\rule[225]{225}{2}\)

Answer: Density

Explanation:  

I remember learning it in 9th-grade physic class.

The constituent particles of material A are heavier than those of material B.

A material with smaller, more heavy, and closely spaced atoms will have a higher density. A substance's density will decrease if its bigger, lighter atoms are separated from one another more widely.

The densities of solids, liquids, and gases are determined by the separations between the particles in each state of matter.

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Yes, it is possible to have an average velocity of 0 for some motion but an average speed of 120 km/h for that motion. This can happen when the object changes direction during its motion.

Let's say a car travels 240 km in a straight line, driving 120 km/h in one direction for 2 hours, and then turning around and driving 120 km/h in the opposite direction for another 2 hours.

The car would end up back where it started, so the average velocity for the entire motion is 0 (since the displacement is 0).

However, the total distance traveled is 480 km, and the total time taken is 4 hours, so the average speed is 480 km / 4 hours = 120 km/h.

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none of the above. According to Newton's third law of motion, for every action, there is an equal and opposite reaction.

In this case, if Joshua is attracted toward Earth by a 500 N gravitational force, then by Newton's third law, Earth is also attracted toward Joshua with an equal and opposite force of 500 N. The gravitational force between two objects is always mutual and equal in magnitude but opposite in direction.

Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The forces always occur in pairs and act on two different objects.

For example, if you push against a wall with a certain amount of force, the wall pushes back on you with an equal amount of force in the opposite direction. Another example is the propulsion of a rocket. The rocket pushes exhaust gases backward, and in response, the gases push the rocket forward with an equal force.

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The mass of Ashanti's book is 1.6kg if the book gains 4.7 J of gravitational potential energy.

The term mass refers to the quantity of matter that makes up something or someone. Additionally, mass can be thought of as the resistance an item has to changes in velocity and, consequently, changes in acceleration, as acceleration is the rate at which velocity changes.

Since it takes effort to lift objects out of the gravitational pull of the Earth, gravitational energy is the potential energy associated with gravitational force. Water in an elevated reservoir or kept behind a dam serves as evidence for gravitational potential energy, which is caused by elevated positions.

The formula for potential energy

PEg=mgh

PEg=4.7J

g=9.8N/kg

h=0.8m

m=?

4.7=m×9.8×0.8

4.7=7.84m

m=7.8/4.7=1.6

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When a ball is rolling down an inclined plane without slipping, the force responsible for causing its rotation is the frictional force. This force acts between the surface of the ball and the surface of the inclined plane, in the opposite direction to the direction of the ball's motion.

Frictional force causes a torque on the ball, which leads to its rotation. It is important to note that the frictional force acts only when the ball is rolling without slipping. If the ball is slipping, then the force responsible for its rotation would be the external force applied to the ball.

In summary, when a ball is rolling down an inclined plane without slipping, the frictional force is responsible for its rotation.
If a ball is rolling down an inclined plane without slipping, the force responsible for causing its rotation is the frictional force. When the ball rolls down the inclined plane, gravity pulls it downwards, which results in a component of force parallel to the inclined plane. This force tries to make the ball slide down the incline.

However, if there is sufficient friction between the ball and the surface, the frictional force acts in the direction opposite to the motion of the ball, preventing it from slipping. As the ball rolls, the point of contact between the ball and the surface momentarily comes to rest, which allows the frictional force to generate torque. This torque causes the ball to rotate around its center of mass, maintaining its rolling motion without slipping.

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the viscosity of water at 0°C is 2.12 × \(10^−1\) poise (P).

To express the viscosity of water at 0°C (2.12×\(10^−2\)kg/(s⋅m)) in poise (P), we need to convert the units accordingly.

We know that 1 P = 1 g/(s⋅cm), and we have the viscosity in kg/(s⋅m). To convert kg to g and m to cm, we need to multiply the value by appropriate conversion factors.

1 kg = 1000 g (since there are 1000 grams in a kilogram)

1 m = 100 cm (since there are 100 centimeters in a meter)

Using these conversion factors, we can convert the viscosity:

2.12 × \(10^−2\) kg/(s⋅m) = 2.12 ×\(10^−2\) × 1000 g/(s⋅100 cm)

                    = 2.12 ×\(10^−2\) × 10 g/(s⋅cm)

                    = 2.12 ×\(10^−1\) g/(s⋅cm)

Therefore, To express the viscosity of water at 0°C (2.12×\(10^−2\) kg/(s⋅m)) in poise (P), we need to convert the units accordingly.

We know that 1 P = 1 g/(s⋅cm), and we have the viscosity in kg/(s⋅m). To convert kg to g and m to cm, we need to multiply the value by appropriate conversion factors.

1 kg = 1000 g (since there are 1000 grams in a kilogram)

1 m = 100 cm (since there are 100 centimeters in a meter)

Using these conversion factors, we can convert the viscosity:

2.12 ×\(10^−2\)kg/(s⋅m) = 2.12 ×\(10^−2\) × 1000 g/(s⋅100 cm)

                    = 2.12 × \(10^−2\) × 10 g/(s⋅cm)

                    = 2.12 × 10^−2\(10^−2\) g/(s⋅cm)

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The wagon's acceleration is approximately 0.138 m/s² when pushed with a force of 81.15 N over a distance of 14.1 m in 14.3 s.

To find the wagon's acceleration, we can use the kinematic equation:

\(\[d = ut + \frac{1}{2}at^2\]\)

Where:

- d is the displacement (14.1 m),

- u is the initial velocity (0 m/s as it starts from rest),

- a is the acceleration (unknown),

- t is the time (14.3 s).

Rearranging the equation, we have:

\(\[a = \frac{2(d - ut)}{t^2}\]\)

Substituting the given values:

\(\[a = \frac{2(14.1 - 0 \cdot 14.3)}{14.3^2}\]\)

Simplifying the equation:

\(\[a = \frac{28.2}{204.49}\]\)

Calculating the acceleration:

\(\[a \approx 0.138 \, \text{m/s}^2\]\)

Therefore, the wagon's acceleration is approximately 0.138 m/s².

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Answer:a farmer?

Explanation:

Because they raise their livestock or plants then eat them once they are big enough or fully grown?

Answer:

The radius of the new planet is ~2.04 * 10⁶ m, or 2,041,752 m.

Explanation:

We can use Newton's Law of Universal Gravitation:

Let's look at Newton's 2nd Law:

We can set these equations equal to each other:

The mass of the second mass (astronaut) cancels out. We are left with:

We are solving for the radius of the new planet, so we can rearrange the equation:

Substitute in our known values given in the problem (G = 6.67 * 10⁻¹¹ ; M = 7.5 * 10²³ ; a = 12).

The radius of the new planet is ~2.04 * 10⁶ m.

When you stand in front of a mirror and reach out with your right hand to shake hands, the image will remain the same size and the hand that the image will extend is the left hand.

A plane mirror is a type of mirror that is not curved and that has a flat reflective surface.

The characteristics of a plane mirror include the following:

When you stand in front of a mirror and reach out with your right hand to shake hands, the image will remain the same size because image size of a plane mirror is the same size with the object.

Also, the hand that the image will extend is the left hand because the image is laterally inverted.

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Answer:

X = 2146.05 m

Explanation:

We need to understand first what is the value we need to calculate here. In this case, we want to know how far from the starting point the package should be released. This is the distance.

We also know that the plane is flying a certain height with an specific speed. And the distance we need to calculate is the distance in X with the following expression:

X = Vt   (1)

However we do not know the time that this distance is covered. This time can be determined because we know the height of the plain. This time is referred to the time of flight. And the time of flight can be calculated with the following expression:

t = √2h/g   (2)

Where g is gravity acceleration which is 9.8 m/s². Replacing the data into the expression we have:

t = √(2*2500)/9.8

t = 22.59 s

Now replacing into (1) we have:

X = 95 * 22.59

This is the distance where the package should be released.

Hope this helps

1 calcium atom, 1 carbon atom, and three oxygen atoms, so 5 in total.

Answer:

Below

Explanation:

If they are all in parallel, the quivalent resistance is given by

            1                     =    3.6 Ω

  1/R1   + 1/R2  + 1/R3