In order to generate electricity from mechanical energy, one essential element needed to transform the energy into electrical energy is
A. an insulator
B. a magnet or a magnetic field
C. a plastic sphere
D. a light bulb

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

What is the measurement of how fast an object moves relative to a reference point?