Negative charges repel positive charges. t/f if a negatively charged rod is brought close to an electroscope that is negatively charged, the two leaves will move farther apart. t/f electrical charges exist in the sea and in the air. t/f coulomb's law describes gravitational attraction t/f an insulator does not allow electrons to flow freely through it. t/f coulomb's law predicts that charged bodies may attract or repel each other. t/f electric fields have magnitude and direction. t/f an electric field is a measure of the force on a unit positive charge. t/f

What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.

Blank liquids and gases exert a buoyant force on objects placed in them

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?