The energy of a wave will remain constant if which of the following changes are made to it is given below
Explanation:
1.In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.
2.First of all for light which is a electromagnetic wave c=frequency*wavelength. As the wavelength increases the frequency decreases. This can be physically understood as the increase in red shift of the light. Also energy =h*frequency,hence increasing wavelength decreases the energy carried by the photon.
3.Wave frequency is related to wave energy. the more energy in a wave, the higher its frequency. The lower the frequency is, the less energy in the wave.
Answer:
I think its C All visible light wavelengths (ROYGBV) are absorbed by the board
Answer:
The angle from the vertical is 48.72°
Explanation:
Given :
Length of rope 
m
Mass of man 
Kg
Mass of car 
Kg
Velocity of car 
According to conservation law,
Potential energy of man is converted to kinetic energy of car moving,
We calculate height,
( ∵ 
)
m
This is the distance of the rope at the bottom,
So we take difference of it.
⇒ 
We can calculate angle between them,
48.72°
Therefore, the angle from the vertical is 48.72°
A power supply A basic motor has a DC power source, in general. It supplies power for the motor or field coils armature. Field Magnet can be a permanent magnet or electromagnet The magnetic field tends to generate a torque on the spinning armature coil by virtue of Fleming's lefthand rule.
Answer:
Power = 1625 Watts
Explanation:
Given the following data;
Energy = 65,000 J
Time = 40secs
To find the power;
Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
Substituting into the equation, we have
Power = 65,000/40
Power = 1625 Watts
