Wind turbines designed for offshore installations are much larger than ones designed for use on land. One company makes a turbine for use on land with blades 38m long that spin at 18rpm , and a turbine for use offshore with blades that are twice as long. At what rate should the blades of the offshore turbine rotate if the speed at the tip is to be the same as that of the turbine on land?

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mdasfaaruddinshareefLv10

11 Aug 2023

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SadhaLv10

31 Jan 2021

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Related questions

MAC, Inc. (the company you work for) has decided to move forwardwith a feasibility
study for a product it wishes to manufacture and sell. This productis a particle launcher that should have the capability, for everyactivation, of launching two particles into the air at twodifferent times and at two different angles of elevation, in anautomated fashion so that they both land at the same distance fromthe launch point at the same time. For example, let P1 and P2 betwo particles, let T1 and T2 be two times, and let theta1 andtheta2 be two angles of elevation. Once activated, the launchershould be able to operate so that particle P1 is launched at timeT1 with an angle of elevation theta 1, and particle P2 islaunched
at time T2 with an angle of elevation theta2.
The launcher must be configured by a technician, prior to eachactivation, so that the
initial speed is set for the launcher, and the distance from thelauncher to where both
particles will land is set. For each activation of the launcher,the initial speed will be the
same for both particles. Once the technician has set the initialspeed and desired distance,
the launcher must calculate the angles of elevation to use and howmuch time to wait in
between particle launches. Then, when the technician activates thelauncher, both
particles will be launched at the appropriate angles of elevationand at the appropriate
times so that they both land at the configured distance from thelauncher at the same time.
The launcher, based on its calculations, will change the angle ofelevation to be ready for
the second particle launch. The launcher, however, must flash awarning for the
technician if the information the technician used to configure thelauncher does not result
in a two-particle launching solution.
Certain assumptions must be made. It is assumed that that launchercan always change
the angle of elevation to get ready for the second particle launchfaster than the time
delay calculated for the second particle launch. It is assumed thatthe units for speed are
meters per second, that the units for distance are meters, and thatgravity is 9.8 meters per
second squared. It is assumed that gravity is the only force actingon the motion of the
particles after launch, and that there is no wind to be considered,so that the particles land
at a point exactly in line with the direction the launcher ispointed.
The questions that must be answered and written up in anengineering report are as
follows:
1. Given the initial speed and desired landing distance for theparticles, find the
mathematical expressions that must be used to find 1, 2, and thetime delay
between particle launches.
2. Determine under which conditions the launcher will not be ableto perform the
operation requested, and will consequently flash a warning to thetechnician.
3. Each particle launched will follow a path of motion that isparabolic. Show that
the vertex of the parabola for each particleâs path occurs at thesame distance from
the launcher.
4. Along the path of each launched particle, there will be amaximum curvature.
Find that maximum curvature for each launched particle.

a large truck collides head-on with a small compact car. during the collision:

1. A large truck collides head-on with a small compact car. During the collision: the

truck exerts the same amount of force on the car as the car exerts on the truck.

neither exerts a force on the other, the car gets smashed simply because it gets in the way of the truck.

the truck exerts a force on the care but the car does not exert a force on the truck.

the truck exerts a greater amount of force on the car than the car exerts on the truck.

the car exerts a greater amount of force on the truck than the truck exerts on the car.

2. Two metal balls are the same size, but one weighs twice as much as the other. The balls are dropped from the roof of a single-story building at the same instant of time. The time it takes the balls to reach the ground below will be:

about half as long for the lighter ball.

about the same time for both balls.

considerably less for the heavier ball, but not necessarily half as long.

about half as long for the heavier ball.

considerably less for the lighter ball, but not necessarily half as long.

pinkshark846

1. Why does FM Radio sound better than AM Radio for music?

Because FM stations don’t transmit as far so the signal is stronger

Because FM broadcast allows modulation frequencies of 100-15,000 Hz.

Because only music stations broadcast on FM

Because FM is a new technology

2. This is a dish antenna with a lot of gain, designed to communicate with deep space satellites. The radio antenna pictured above has motors that point it at satellites. Why does the antenna need to move to work?