Rapidity of motion or operation; swiftness; quickness. Mech. the rate of motion ; the change of position of a point per unit of time ; the rate of motion in which direction as well as speed is considered.
Kinetic energy
Explanation:
The windmill's blades moving by blowing wind represents kinetic energy.
Kinetic energy is the energy due to the motion of the particles of a medium. It is simply energy due to motion.
Energy is the ability to do work. It is of two types:
- Kinetic energy
- Potential energy
Potential energy is the energy at rest.
Wind energy is harnessed in moving the blades of a mill. An energy transformation from wind/tidal/wave energy to mechanical energy occurs here.
Wind,wave and tidal energy causes a disturbance in air particles which then transferred on the blades of the mill and it in turn rotates them.
The blades of the mill are carefully designed to provide the maximum rotation with little amount of disturbance on them.
When wave, wind and tidal energy collides with the blade, the potential energy of the blades initially at rest is transformed to kinetic energy in the motion by the rotating blades about a fixed axis. This is channeled to drive turbines in power stations where electricity is eventually produced.
The mechanical energy produced by the rotating mill is a form of kinetic energy. Both energy forms are due to motion of objects through which work can be done.
Learn more:
Kinetic energy brainly.com/question/6536722
#learnwithBrainly
Answer:
Hence to get the same speed, the ratio of poles of generator to motor should be 3.
Explanation:
We are given that the speeds of the motor-generator sets are same.
In case of motors we have operating frequency 16.67 Hz and now we need to define the number of poles of generator set so that we can get the same speed.
For the case of motor, we write an equation;
f m = speedm x Pm / 120
speedm = fm x 120 / Pm
For the case of generator we write an equation;
speedg = fg x 120 /Pg
Now we know that speedm = speedg
fm x 120 / Pm = fg x 120 /Pg
fm / Pm = fg /Pg
16.67 / Pm = 50 / Pg
Pg / Pm = 50 / 16.67
Pg / Pm = 3
Hence to get the same speed, the ratio of poles of generator to motor should be 3.
For example;
If motor has 2 poles, then generator will have 6 poles
You can use the displacement method or the eureka can so basically in the displacement can what you have to do is to put some water into a measuring cylinder and measure its volume before adding the irregular shaped object and then measuring the level of water which had been displaced and then eureka can you can check online
