Calculate the magnitude of the net electric field at the origin due to these two point charges.?3) A point charge q1=-4.00nC is at the point x=0.60m, y=0.80m , and a second point charge q2=+6.00nC is at the point x=0.60m , y=0. A) Calculate the magnitude of the net electric field at the origin due to these two point charges. B) Calculate the direction of the net electric field at the origin due to these two point charges. (clockwise from +-x axis)

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?

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?