There are 1,660 megawatts of wind-generated electricity produced globally every year. this amount is equivalent to a. 1,660,000 watts b. 1,660,000 kilowatts c. 16,600,000 watts d. 166,000 kilowatts

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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?