The fan uses electrical energy and converts it into mechanical , thermal/ heat and sound energy. The total percentage of energy equals 100%. What does the image demonstrate about law of conservation of energy?

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?