Answer:
Work=29.43
Explanation:
Work=Force*distance
we have the distance of 2 meters. We just need to find the Force.
Force=mass*acceleration
Force=1.5kg*9.81m/s^2
acceleration is Earth's acceleration on an object which is 9.81m/s^2
Force=14.715
lastly, just multiple 14.715N*2m to get your answer of 29.43
Answer:
Explanation:
Standing waves are not propagation waves but the different modes of vibration of a string, a membrane, etc. They are waves that result from the superposition of propagation waves that maintain a constant interference giving a new wave pattern. The frequency that a wave must have to give a stable standing wave is:
Where:
Using this, we can estimate the first three standing-wave frequencies:
(Remember to convert cm to m)
445/100 - 5/4 = 445/100 - 125/100 = 320/100 = 16/5 = 3 1/5.
Answer
Correct Answer is B(to change direct current into alternating current)
Explanation
commutation
The main aim of commutation is to maintain the torque acting on armature of DC motros in the same direction.
commutator a switch which is used to convert the direction of flow of electric current it is connected to the armature of DC motor.
In DC motors, voltage across the armature is alternating in nature. The direction of this current is reverses by Commutator when armature of DC motors passes through magnetic neutral axis to maintain the unidirectional. Hence, commutator is used to change direct current into alternating current.