Gravity can be defined as a force of attraction between objects. the effects of gravity can be witnessed in many systems. which of these actions is an example of gravity influencing other systems? a. groundwater moving to the surface in an artesian well b. surface water evaporating into the atmosphere c. planets moving around the sun in an elliptical pattern d. glaciers melting because of increasing temperatures

What is the single most important equation in all of physics?

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?

Which planet do you think would be easiest for humans to colonize some day?