Why was china very interested in constructing the three gorges dam?

Answers

Answer 1

Overall, the Three Gorges Dam was considered an ambitious and strategic project for China's future, and it was a high priority for the government.

Why China was very interested in constructing the Three Gorges Dam?

China was very interested in constructing the Three Gorges Dam for several reasons:

Energy Generation: The Three Gorges Dam is the largest hydroelectric power plant in the world and generates over 22,500 megawatts of electricity, which is a significant contribution to China's energy mix.

Flood Control: The Yangtze River, where the dam is located, is prone to frequent and severe floods, which have caused significant damage and loss of life over the years. The Three Gorges Dam was intended to help control and reduce the severity of these floods.

Transportation: The dam created a large reservoir that made river transportation easier and more efficient by providing a deeper and wider waterway for cargo ships.

Economic Development: The construction of the dam created jobs and economic opportunities in the region, and the increased transportation capabilities and energy generation capacity were expected to drive further economic development.

National Prestige: The construction of the Three Gorges Dam was also seen as a symbol of China's technological advancement and economic power.

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Related Questions

Help, quick please. I need help with my engineering word problem

Help, quick please. I need help with my engineering word problem

Answers

Answer:

a

Explanation:

The answer is The first one A

4. A 1.5 kg turtle crawls in a straight line at a speed of 0.51 m/sec. What is the turtle's
momentum???

Answers

Answer:  0.765 m kg / s

Explanation:

Momentum = (mass) x (speed)

For some metal alloy, a true stress of 345 MPa (50040 psi) produces a plastic true strain of 0.02. How much will a specimen of this material elongate when a true stress of 416 MPa (60340 psi) is applied if the original length is 500 mm (19.69 in.)

Answers

For some metal alloy, a true stress of 345 MPa (50040 psi) produces a plastic true strain of 0.02.

We are supposed to calculate how much will a specimen of this material elongate when a true stress of 416 MPa (60340 psi) is applied if the original length is 500 mm (19.69 in.)Let's first start with calculating the value of K (Constant):K = Stress/ Strain K = 345/0.02K = 17250MpaFor any other value of stress.

we can use the value of K and the formula: Stress = K * Strain By substituting the value of stress and K in the formula, we get;416 = 17250 * Strain Strain = 0.0241The change in length can be calculated by using the formula: Change in length = original length * Strain Change in length = 500 * 0.0241Change in length = 12.05 mm Therefore.

the specimen will elongate by 12.05 mm when a true stress of 416 MPa is applied if the original length is 500 mm.

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what are 2 things that you learned about the other person you talked to when prompted?

Answers

Here are general tips on how to improve communication skills and learn more about the people you talk to.

What is the explanation for the above response?

1. Practice active listening: When someone is talking to you, make sure you give them your full attention. Listen to what they are saying without interrupting or judging. Ask questions to clarify what they mean, and summarize what you heard to make sure you understood correctly.

2. Ask open-ended questions: If you want to learn more about someone, ask them open-ended questions that encourage them to share their thoughts and feelings. Instead of asking yes-or-no questions, ask questions that start with "how," "what," or "why." For example, "How did you get interested in that hobby?" or "What was it like growing up in your hometown?"

By using these techniques, you can improve your communication skills and learn more about the people you talk to.

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What's the relationship between energy and time

Answers

Answer:

The relationship between power, energy, and time can be described by the following equation : P = Δ E s y s Δ t. P is the average power output, measured in watts (W) ΔEsys is the net change in energy of the system in joules (J) - also known as work. Δt is the duration - how long the energy use takes - measured in seconds (s).

Explanation:

What is land administration and cadastral survey

Answers

Cadastral surveying is the sub-field of cadastre and surveying that specialises in the establishment and re-establishment of real property boundaries. ... A cadastral surveyor must apply both the spatial-measurement principles of general surveying and legal principles such as respect of neighboring titles.

Summarize the differences between applied science and basic science.

Answers

Answer:

basic would be more of how it works such as cells where applied is to fix like medical

Explanation:

from internet

Basic science, such as understanding how cells work, is research aimed at understanding fundamental problems. Applied science, such as the medical field, is the application of basic scientific knowledge to solve practical problems. Applied science uses and applies information obtained through basic science.

have a nice day

A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 300 kPa. Heat transfer continues until the total volume increases by 20 percent.


Determine:

(a) the initial and final temperatures,

(b) the mass of liquid water when the piston first start moving

Answers

a)  The initial and final temprature are 99.61°C and T3 = 259.07°C

b)   The mass of liquid water when the piston first start moving is 0g

Using the data provided:

Initial Pressure = P1 = 125kPa

Mass of Saturated Vapor Liquid = m = 5kg

Initial Mass of Liquid water = mf = 2kg

Initial Mass of Vapor = mg = 3kg

The temperature for a mixture of liquid steam saturated with water according to the thermodynamic table is:

T₁ = 99.61°C

The specific volume is:

vf = 0.001043m³/kg

And the saturated volume is:

vg = 1.6941m³/kg

Therefore, the volume in state 1 will be equal to:

V1 = mfvf + mgvg

V1 = (2kg)(0.001043m³/kg) + (3kg)(1.6941m³/kg)

V1 = 5.084m³

In state 3 then the volume will be equal to:

V3 = 1.2V1

V3 = 1.2(5.084m³)

V3 = 6.1008m³

Then the specific volume will be equal to:

v3 = V₃/m

v3 = 6.1008m³/5kg

v3 = 1.2202m³/kg

For a pressure of 300 kPa and the previous specific volume found through the thermodynamic table, the value of the temperature is:

T3 = 259.07°C

Question b) When the piston first stats moving at P₂ = 300kPa and V₂ = V₁ = 5.084m³

v₂ =V₂/m

v₂ = 5.084m³/5kg

v2 = 1.0168m³/kg

While at 300 kPa the value of the vapor saturated vg = 0.88578m³/kg This implies that the condition is met:

v2 > vg

Therefore, no liquid is there in-cylinder when piston stats moving, mf = 0kg

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The resistance of a 5m length of wire 600ohms. Determine the resistance of an 8m length of the same wire

Answers

The resistance of an 8m length of the same wire is 960 Ω

What is the resistance of an 8m length of same wire:

Give the Resistance of  wire ( R ) = 600 Ω

Given the length of the wire is  (l)= 5 m

We know that

⇒ R = ρl/A

[ where R is resistance, l is the length of the conductor, ρ is proportional constant and is called Resistivity, and A is the cross-section area ]

⇒ 600 = ρ5/A

⇒ 600/5 = ρ/A

⇒ 120 = ρ/A

⇒ ρ/A = 120

If the length of the wire ( l ) is 8 m,

Resistance ( R ) = ρl/A

⇒ R = ρ8/A

⇒ R = 8 * ρ/A

Because the same material proportionality constant remains constant, we can use  ρ/A = 120 in the equation.

⇒ R = 8 * 120

⇒ R = 960 Ω

Alternative way :

We already know that resistance (R) :

Since it is directly proportional to length R ∝ l

⇒ R = kl

[ Where k is proportionality constant ]

⇒ R/l = k

⇒ 600/5 = k

⇒ 120 = k

When the Length of the wire = 8 m

⇒ R = kI

⇒ R = 120 * 8

Hence, the resistance of length 8 m wire is 960 Ω.

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An experimental device imparts a force of magni tude F = 225 N to the front edge of the rim at A to simulate the effect of a slam dunk. Determine the moments of the force F about point 0 and about point B. Finally , locate , from the base at O ​​, a point C on the ground where the force imparts zero moment .

Answers

Given,Force magnitude F = 225 N.The position vector of A from O is, OA = 450 i mm + 300 j mm .The position vector of B from O is, OB = 900 i mm .Let, point C on the ground where the force imparts zero moment.

Then, the position vector of C from O is,OC = x i mm + 0 j mm.Now, the position vector of A from C is,AC = (x - 450) i mm + 300 j mm .For the force F, the position vector of A from O is, rA = 450 i mm + 300 j mm .The position vector of B from O is, rB

= 900 i mm .The position vector of C from O is, rC

= x i mm .Let's find the moments of force F about O and B.Moment of force F about O,MO

= rA × F

= [(450 i + 300 j) × 225 k] mm²MO

= [-67500 i + 101250 j] Nmm = 101.25 Nm (anticlockwise)Moment of force F about B,MB

= rB × F

= [(900 i) × 225 k] mm²MB

= [-202500 i] Nmm

= -202.5 Nm (clockwise)Now, let's locate the point C on the ground where the force imparts zero moment. For this, we need to find the position vector of C from O such that the moment of force F about C is zero.Moment of force F about C,MC

= AC × FMC

= [(x - 450) i + 300 j] × 225 k NmmFor zero moment, MC

= 0.⇒ [(x - 450) i + 300 j] × 225 k

= 0⇒ [(x - 450) i + 300 j]

= 0⇒ (x - 450) i

= - 300 j⇒ x

= - 300/450

= - 2/3 mmSo, the position vector of C from O is,OC

= x i mm + 0 j mmOC

= (- 2/3) i mmThe point C is located at a distance of 2/3 mm to the left of point O, along the ground.Hence, the solution is complete.

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if you were responding on a concurrent vi-30 seconds with a 3-second cod, and you switched back and forth form one schedule to the other very 1. 5 seconds (that is, left, right, left, etc. ), reinforcement would occur: on the average, every 30 seconds and 15 responses on the average, every 30 seconds and 30 responses on the average, every 15 responses never

Answers

A concurrent schedule is made up of two or more separate schedules that are presented at the same time and lead to different reinforcers.

Parallel schedule A reinforcement process where the participant can select their response from one of two or more accessible simple reinforcement schedules at once. The assessment of choice between straightforward schedule alternatives is possible with concurrent schedules.

The reinforcement schedules that are in place when two or more behaviors are reinforced simultaneously on various schedules. An illustration would be watching TV while on the phone and browsing the internet.

Two stimuli are pitted against one another in a concurrent schedule of reinforcer assessment to see which will result in a larger increase in responding when presented as a reward for responding. The reinforcer with more responses is the more potent one.

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in an operating system the scheduler perform the task of assigning ___processes to ___

Answers

The task of the scheduler in an operating system is; Assigning system processes to Run queue.

What is a Scheduler in OS

Schedulers as their name implies are special system software which handle process scheduling in various ways. Their main objective is to select the jobs to be submitted into the system and to decide which process to run accordingly.

On this note, The OS scheduler determines how processes are moved between the ready and run queues which can only have one entry per processor core on the system;

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Calculate the generated EMF of a D.C. motor with the following parameters: magnetic flux is 52 W, 6 armature conductors, 14 generator poles and 3 parallel paths and speed is 32rpm.

Answers

the generated EMF of the DC motor with the given parameters is approximately 55.47 volts.

To calculate the generated electromotive force (EMF) of a DC motor, you can use the formula:

EMF = (P × Z × N) / (A × 60)

Where:

EMF = Electromotive Force (in volts)

P = Magnetic Flux (in Webers)

Z = Number of Armature Conductors

N = Speed of the motor (in revolutions per minute)

A = Number of parallel paths

Using the given parameters:

Magnetic Flux (P) = 52 W

Number of Armature Conductors (Z) = 6

Number of Generator Poles = 14

Number of Parallel Paths (A) = 3

Speed of the motor (N) = 32 rpm

Substituting these values into the formula:

EMF = (52 × 6 × 32) / (3 × 60)

EMF = 166.4 / 3

EMF ≈ 55.47 volts

Therefore, the generated EMF of the DC motor with the given parameters is approximately 55.47 volts.

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An Accenture Sales team is in conversations with a potential client who has expressed interest in Artificial Intelligence (AI) solutions for their business.

What should the Sales team emphasize to differentiate Accenture’s AI capabilities in the marketplace?

Answers

The sales team should emphasize on Accenture's large amount of industry knowledge, experience, and proprietary assets in the AI space.

What is AI?

AI is an abbreviation for Artificial Intelligence and it can be defined as a subfield in computer science that deals with the use of advanced computer algorithms and technology to develop an intelligent,  smart computer-controlled robot with the abilities to proffer solutions to very complex problems.

In this scenario, it is very important for the sales team should emphasize on Accenture's large amount of industry knowledge, experience, and proprietary assets in the AI space in order to differentiate their AI capabilities in the marketplace.

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a pressure cooker is a pan that cooks food much faster than ordinary pans by maintaining a higher pressure and temperature during cooking. the pressure inside the pan is controlled by a pressure regulator (the petcock) which keeps the pressure at a constant level by periodically allowing some steam to escape, thus preventing any excess pressure buildup. a certain pressure cooker has a volume of 6 l and an operating pressure of 75 kpa gage. initially, it contains 1 kg of water. heat is supplied to the pressure cooker at a rate of 500 w for 30 min after the operating pressure is reached. assuming an atmospheric pressure of 100 kpa, determine: a) the temperature at which cooking takes place. b) the amount of water left in the pressure cooker at the end of the process. assume some liquid water is still in the pan.

Answers

More cooking is done before the water actually begins to boil thanks to the raised pressure inside the cooker, which raises the boiling point of water above 1000C. In the end, food cooks more quickly.

Slow-cooked meals can be quickly prepared with pressure cookers. They are efficient in terms of electricity consumption and are excellent for tenderizing less expensive portions of meat. They are a healthy cooking method since they effectively retain nutrients and can cut cooking times by up to 50%. Water boils at 121°C (250°F) at that pressure. As a result, food may cook at considerably greater temperatures than it could under atmospheric pressure. Additionally, because cooking reactions quicken at higher temperatures, food cooks more quickly it is a good technology.

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A horizontal force P is applied to a 130 kN box resting on a 33 incline. The line of action of P passes through the center of gravity of the box. The box is 5m wide x 5m tall, and the coefficient of static friction between the box and the surface is u=0.15. Determine the smallest magnitude of the force P that will cause the box to slip or tip first. Specify what will happen first, slipping or tipping.

A horizontal force P is applied to a 130 kN box resting on a 33 incline. The line of action of P passes

Answers

Answer:

SECTION LEARNING OBJECTIVES

By the end of this section, you will be able to do the following:

Distinguish between static friction and kinetic friction

Solve problems involving inclined planes

Section Key Terms

kinetic friction static friction

Static Friction and Kinetic Friction

Recall from the previous chapter that friction is a force that opposes motion, and is around us all the time. Friction allows us to move, which you have discovered if you have ever tried to walk on ice.

There are different types of friction—kinetic and static. Kinetic friction acts on an object in motion, while static friction acts on an object or system at rest. The maximum static friction is usually greater than the kinetic friction between the objects.

Imagine, for example, trying to slide a heavy crate across a concrete floor. You may push harder and harder on the crate and not move it at all. This means that the static friction responds to what you do—it increases to be equal to and in the opposite direction of your push. But if you finally push hard enough, the crate seems to slip suddenly and starts to move. Once in motion, it is easier to keep it in motion than it was to get it started because the kinetic friction force is less than the static friction force. If you were to add mass to the crate, (for example, by placing a box on top of it) you would need to push even harder to get it started and also to keep it moving. If, on the other hand, you oiled the concrete you would find it easier to get the crate started and keep it going.

Figure 5.33 shows how friction occurs at the interface between two objects. Magnifying these surfaces shows that they are rough on the microscopic level. So when you push to get an object moving (in this case, a crate), you must raise the object until it can skip along with just the tips of the surface hitting, break off the points, or do both. The harder the surfaces are pushed together (such as if another box is placed on the crate), the more force is needed to move them.

what are the importance of crystallography in geology

Answers

The importance of crystallography in geology is that it is used in phase identification of minerals.

What is crystallography?

Crystallography can be defined as the study of minerals and it's description according to geometrical observation.

In geology, minerals are resources of major economic importance and they are mostly crystalline. This simply explains the role of crystallography in geology.

Therefore, the importance of crystallography in geology is that it is used in phase identification of minerals.

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A bolt and nut clamp 4 thin materials, of the geometry and tolerances shown. The bolt must always protrude from the bottom of the nut. Assuming all parts arrive where 93.3% (30) meet the tolerances shown, what is the minimum protrusion would you expect for the same share, 93.3% (30), of assembled parts? OA: -0.22 OB:- 40 O C: 0.64 OD: 0.85 O E: 1.15

Answers

Therefore, the minimum protrusion we would expect for 93.3% (30) of assembled parts is 2.65 mm.

To answer this question, we need to first understand what is meant by "protrusion". Protrusion refers to the amount of the bolt that extends beyond the bottom of the nut once the clamp is fully assembled.
Given that 93.3% (30) of the parts meet the tolerances shown, we can assume that there will be some variation in the assembled parts. In other words, not all assembled parts will be exactly the same.
To determine the minimum protrusion we would expect for this share of assembled parts, we need to consider the worst-case scenario, which is when all the tolerances stack up against us.
The tolerances shown in the diagram indicate that the thickness of the four materials can vary by up to ±0.1mm, and the height of the nut can vary by up to ±0.05mm. This means that the total height of the assembled parts can vary by up to ±0.4mm (4 x 0.1mm), and the height of the nut can vary by up to ±0.05mm.

To calculate the minimum protrusion, we need to consider the case where the nut is at its maximum height tolerance (+0.05mm), and the four materials are at their minimum thickness tolerance (-0.1mm each, for a total of -0.4mm). This would result in the total height of the assembled parts being -0.35mm (i.e., lower than the nominal height of the clamp).

To ensure that the bolt always protrudes from the bottom of the nut, we need to add the height of the nut to the total height of the assembled parts. In this worst-case scenario, the total height would be:
-0.35mm (total height of assembled parts) + 3mm (height of nut) = 2.65mm
Therefore, the minimum protrusion we would expect for 93.3% (30) of assembled parts is 2.65mm.

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Guys please help me can some one explain me this quesion
Queston "How urban planning can improve public health" ?

Answers

Inadequate nutrition, pollution-associated health disorders and communicable illnesses, poor sanitation and housing conditions, and linked health conditions are some of the primary health concerns caused by urbanization. Hence, a properly planned topography will prevent these negative concerns.

What is Urban Planning?

The drafting of plans for, as well as the control and management of, towns, cities, and metropolitan regions falls within the purview of urban planning. It tries to arrange sociospatial linkages at many levels of government and governance.

Urban planning can help to create more livable and desirable communities by designing for walkability, accessibility, and green spaces.

It can help to create more efficient and sustainable communities by promoting the use of public transportation, promoting mixed-use development, and designing for energy efficiency. This can help to reduce greenhouse gas emissions, reduce traffic congestion, and save energy.

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1. Burning used oll on-site is one option for used oll recycling.
A) O True
B) O False

Answers

Answer:

false

Explanation:

burning a substance is not recycling it

Select all the correct answers. What are two reasons why the terrestrial planets formed closer to the sun after a supernova event that initiated the formation of the solar system?

Answers

It is because of their gravitational pull .. Due to high gravitational force the planets are tend to move closer and they infact form closer to the sun. as the mass of the sun is very large

The distribution of soil loading on the bottom of a building slab is shown.
a) Replace this loading by an equivalent resultant force.
b) Specify its location, measured from point O

Answers

The fundamental principle is that two force systems are equal if they produce the same resultant force and resultant moment.

A force can be moved along its line of action to create a new force system that is comparable to the original force system. The Pythagorean theorem is used to calculate the resultant force when two forces are acting perpendicularly to one another. The formula for the resultant force is FR = F1 + F2 + F3. Where. The three forces that are acting on an object in the same direction are F1, F2, and F3. In other words, the forces of action and reaction work in tandem. Therefore, the outcome is zero if action and reaction are applied to the same body.

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When calculating the area of a ceiling for a heating and cooling load calculation, all overhangs are included. True False

Answers

In a heating and cooling load calculation, false is the answer for the given statement. When calculating the area of a ceiling for a heating and cooling load calculation, overhangs are not included.

What is a heating and cooling load calculation .A heating and cooling load calculation is used to determine the amount of heating and cooling required to maintain the desired temperature and humidity levels inside a building.

The load calculation takes into account a variety of factors, including the size of the building, the number of windows and doors, the level of insulation, and the climate of the area. How is the area of a ceiling calculated?The area of a ceiling is calculated by multiplying the length and width of the ceiling .

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WHICH TASK BEST FITS THE ROLE OF A DESIGN ENGINEER ?

Answers

Answer: drafting blueprints

Explanation:

how does a diaphragm pump​ work ?​

Answers

Answer:

Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. ... Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides.

29 10 1 point According to Gate Theory, which of the following factors can make you more sensitive to pain? Placebo effects Competing signals, like rubbing your elbow Chronic stress High levels of arousal 30 1 point Patients who are allowed to self-administer morphine use less than when they receive injections from healthcare providers. True False 31 1 point What happens when people lose their sense of smell (olfaction)? They often become manic. 32 Not much. Olfaction is not a very important sense for humans. They compensate by developing an increased sensitivity to taste (gustation). They often become depressed. 1 point The different taste qualities (sweet, sour, bitter, salt, umami) each have their own area of the tongue that is most sensitive to them. True False

Answers

The statement that The different taste qualities (sweet, sour, bitter, salt, umami) each have their own area of the tongue that is most sensitive to them is False.

Gate Theory states that competing signals such as rubbing your elbow can make you more sensitive to pain. This theory suggests that physical signals such as massage, pressure, heat, or cold can block the transmission of pain messages through the spinal cord and prevent them from reaching the brain. Therefore, when people rub their elbows or apply pressure to the area, this stimulates the non-painful touch fibers and decreases the transmission of the painful stimuli.

As per the statement, patients who are allowed to self-administer morphine use less than when they receive injections from healthcare providers is True. Olfaction is a very important sense for humans, and they often become depressed when they lose their sense of smell (olfaction). The statement that The different taste qualities (sweet, sour, bitter, salt, umami) each have their own area of the tongue that is most sensitive to them is False.

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Q2- The figure below shows a closed tank holding water and oil. Air pressure is P kPa is
the air pressure above the oil. Calculate the pressure at the bottom of the container?
What is the pressure at the bottom of the container?
Use your last three digits of your ID the pressure values
0.25 m
Air
0.50 m
Oil
(sg = 0,85)
0,75 m
Water
18 m
1.2 m
ID:306

Q2- The figure below shows a closed tank holding water and oil. Air pressure is P kPa isthe air pressure

Answers

Answer:

The figure below shows a closed tank holding water and oil. Air pressure is P kPa is the air pressure above the oil. Calculate the pressure at the bottom of the container? What is the pressure at the bottom of the container? Use your last three digits of your ID the pressure values 355 0.25 Air 0.50 m O. isg 0.85 0.75 m Wat 1.8m 1.2m

Answer:

the air pressure above the oil. Calculate the pressure at the bottom of the container?

What is the pressure at the bottom of the container?

Use your last three digits of your ID the pressure values

0.25 m

Air

0.50 m

Oil

(sg = 0,85)

0,75 m

Water

18 m

1.2 m

ID:306

Explanation:

the air pressure above the oil. Calculate the pressure at the bottom of the container?

What is the pressure at the bottom of the container?

Use your last three digits of your ID the pressure values

0.25 m

Air

0.50 m

Oil

(sg = 0,85)

0,75 m

Water

18 m

1.2 m

ID:306

The current flowing into the collector lead of a certain bipolar junction transistor (BJT) is measured to be 1 nA. If no charge was transferred in or out of the collector lead prior to t = 0, and the current flows for 1 min. calculate the total charge which crosses into the collector.

Answers

Answer:

the total charge which crosses into the collector is 60 nC

Explanation:

Given the data in the question;

current flowing into the collector lead of the bipolar junction transistor (BJT); i = 1 nA = 10⁻⁹ A

no charge was transferred in or out of the collector lead prior to t = 0

the current flow time t = 1 min = 60 sec

Now we write the relation between current, charge, and time;

i = dq / dt

where i is current, q is charge and t is time. { d refers to change }

Now,

\(q=\int\limits^t_{t=0} {i(t)} \, dt\)

\(q=\int\limits^{t=60}_{t=0} { (10^{-9}) } \, dt\)

\(q = ( 10^{-9}) (t)_0^{60\)

\(q = ( 10^{-9}) ( 60 - 0 )\)

q = 60 × 10⁻⁹ C

q = 60 nC

Therefore, the total charge which crosses into the collector is 60 nC

what is the speed of a spur gear with 42 teeth driven by a pinion gear with 14 teeth turning 420 rpm?

Answers

The formula for calculating gear speed is: (rpm of the driving gear * number of teeth on the driving gear) / number of teeth on the driven gear.

What is the formula for calculating gear speed?

To calculate the speed of the spur gear, we can use the gear ratio formula, which is gear ratio = number of teeth on driven gear (spur gear) / number of teeth on driving gear (pinion gear).

In this case, the gear ratio is 42/14 = 3.

Next, we can use the formula for gear speed, which is gear speed = pinion gear speed / gear ratio.

Since the pinion gear is turning at 420 rpm, the gear speed of the spur gear is:

gear speed = 420 rpm / 3 = 140 rpm.

Therefore, the speed of the spur gear with 42 teeth driven by a pinion gear with 14 teeth turning at 420 rpm is 140 rpm.

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Question One a) Given a four-cylinder cycle engine with a 90-mm bore, 100-mm stroke, and a (6 marks) clearance volume of 0.106 L, calculate the total engine displacement, the compression ratio, Is this engine a petrol engine or diesel engine and explain why? i. ii. iii. h) Explain briefly the principle of​

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a) The total engine displacement of the four-cylinder cycle engine is calculated by multiplying the bore, stroke, and clearance volume together. In this case, it would be 90 mm x 100 mm x 0.106 L, which equals 9.54 L. The compression ratio is calculated by dividing the clearance volume by the total engine displacement. In this case, it would be 0.106 L/9.54 L, which equals 1.11.

It is not possible to determine whether this engine is a petrol engine or a diesel engine without more information. Petrol and diesel engines differ in the way they ignite the fuel-air mixture, with petrol engines using spark plugs and diesel engines using compression. The compression ratio can be an indicator of whether an engine is a petrol or diesel, as diesel engines typically have higher compression ratios than petrol engines. However, this engine has a compression ratio of 1.11, which does not provide enough information to determine the type of engine.

h) The principle of four-stroke cycle engines is that the piston moves up and down four times in the cylinder during a single cycle. The four strokes are the intake stroke, compression stroke, power stroke, and exhaust stroke. During the intake stroke, the intake valve opens to allow air and fuel to enter the cylinder. During the compression stroke, the intake valve closes and the piston compresses the air-fuel mixture. During the power stroke, the spark plug ignites the air-fuel mixture, causing the piston to move down and generating power. During the exhaust stroke, the exhaust valve opens and the piston pushes the exhaust gases out of the cylinder.
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