Mia walks with a velocity of 1.3 m/s south. she does so while riding on a train that is traveling with a velocity of 4.6 m/s north. what is mia`s velocity?

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

Explain vector addition, triangle method and parallelogram method

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.