To write a program that will generate a bill for sending a telegram and give the user the opportunity to translate a message into morse code, follow the steps given below.
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The nozzle has a diameter of 40 mm. Assume water is ideal fluid, that is, incompressible and frictionless (Figure 1) Part A If it discharges water with a velocity of 20 m/s against the fixed blade, determine the horizontal force exerted by the water on the blade. The blade divides the water evenly at an angle of θ-45° Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 F-Value Units 40 mm Submit Request Answer Provide Feedback Next
From the given information, we can calculate the flow rate of water through the nozzle as follows:
Q = A * V
where Q is the flow rate, A is the cross-sectional area of the nozzle, and V is the velocity of the water.
The cross-sectional area of the nozzle can be calculated as:
A = (π/4) * d^2
where d is the diameter of the nozzle.
Substituting the given values, we get:
A = (π/4) * (0.04 m)^2 = 0.0012566 m^2
The flow rate can now be calculated as:
Q = A * V = 0.0012566 m^2 * 20 m/s = 0.02513 m^3/s
The force exerted by the water on the blade can be calculated using the momentum equation:
F = ρ * Q * V * tan(θ-45°)
where ρ is the density of water, and θ is the angle at which the water hits the blade.
Assuming a density of water to be 1000 kg/m^3, we get:
F = 1000 kg/m^3 * 0.02513 m^3/s * 20 m/s * tan(θ-45°)
Substituting θ = 45° (since the water is hitting the blade at an angle of θ-45°), we get:
F = 1000 kg/m^3 * 0.02513 m^3/s * 20 m/s * tan(0°) = 0 N
Therefore, the horizontal force exerted by the water on the blade is 0 N. This is because the water hits the blade at a perpendicular angle and there is no component of force in the horizontal direction.
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to submit tenders for a structure to help people safely cross the river at KwaDukuza The Thukela Municipality placed a tender request in the newspaper asking contractors village. Municipalities are not allowed to choose a contractor without giving as many contractors as possible a chance to apply. This is to stop anyone from being favoured over others, and to prevent corruption. Each contractor writes a tender document, which is a description of their plan for the project and shows how much they will charge to complete the work. The job is given to the contractor who presents the best plan at the lowest price. You are going to build a structure to help the community. Read the story again and then investigate the different bridges below to decide which structure will be the best solution for the problem.
Answer:
In general, the choice of bridge design will depend on various factors such as the location, the environment, the length of the span, the expected traffic, the budget, and the construction time. Different types of bridges, such as beam bridges, arch bridges, suspension bridges, and cable-stayed bridges, have different strengths and weaknesses, and are suitable for different situations.
Some factors to consider when choosing a bridge design include:
Span: If the river is wide, a longer span bridge such as a suspension or cable-stayed bridge may be required.
Location: The local geology, topography, and environmental conditions may dictate the type of bridge that can be built.
Budget: Some bridge designs are more expensive than others. A beam bridge may be the most cost-effective option.
Traffic: If the bridge will carry heavy vehicles or high volumes of traffic, a stronger, more durable bridge such as a cable-stayed bridge may be required.
Ultimately, the choice of bridge design will depend on a careful evaluation of these factors and the needs of the community. It is important to consult with experts and stakeholders to ensure that the chosen design is safe, effective, and meets the requirements of the project.
Explanation:
ANSWER : PONTOON BRIDGES
OR SUSPENSION BRIDGES
PONTOON BRIDGES:
take a bunch boats or rafts
tie them together
put a path/road on top of them
if a boat can carry a truck then so can a pontoon bridge
armies use them
smaller cost & safe
SUSPENSION BRIDGES:
source of strength its flexibility to wind,gravity, physical considerations
can be made of steel
but even cheaply with rope or jute etc.
When considering the strength in terms of load-bearing capacity and versatility, truss bridges are often considered to be the strongest type of bridge. Truss bridges are made up of interconnected triangles that distribute weight evenly across the structure, making them highly resistant to bending and compression forces. They are also relatively easy to construct using simple materials such as wood or steel, which may make them a more practical option for underserved communities.
That being said, arch bridges can also be quite strong and durable, as they rely on the inherent strength of their curved shape to distribute weight. Suspension and cable-stayed bridges, on the other hand, require more advanced engineering and construction techniques, and may be less feasible for communities with limited resources. Beam bridges are typically the simplest type of bridge, but may not be as strong or versatile as truss or arch bridges.
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Determine the moment of the force about point O. Assume F = 750 lb. (Figure 1) Express your answer to three significant figures and include the appropriate units.
The moment of the force is 3750 lb-ft, where lb-ft stands for pound-feet, the unit of torque or moment.
To determine the moment of the force about point O, we need to calculate the perpendicular distance between the line of action of the force and point O. From the figure, we can see that the distance is given by the distance between points O and B, which is 5 feet. Therefore, the moment of the force about point O is given by:
Moment = F x d = 750 lb x 5 ft = 3750 lb-ft
Torque, also known as moment or moment of force, is a measure of the twisting force that causes an object to rotate around an axis or pivot point. It is a vector quantity, which means it has both magnitude and direction. The magnitude of torque is given by the product of the force applied and the perpendicular distance between the axis of rotation and the line of action of the force.
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