If a point charge of -30 experiences an electrostatic upward force of 27 mN at a certain location in the lab, what are the magnitude and direction of the electric field at that location? the potential difference two square parallel plates is 4 V if the plate separation is 6 cm and they each measure 1.5 m by 1.5 m what is the magnitude of the electric field between the plates?

What properties of a moving object are used in determining the object's energy of motion

Select the correct answer. what does the process of natural selection involve?

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?