You have a circuit that uses 4 batteries to have a total voltage of 12V. The circuit is in series, and
has two 25 Ohm resistors and one 10 Ohm
resistor. What is the total resistance of the
circuit? What is the current (amperage) through
the circuit? (Remember: V = IR is the formula
from Ohm's Law)

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?