No work is done by an object at rest because. 1) no force is acting on the object.
2) no distance is moved.
3) heat is not produced.
4) friction is acting on the object

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

In a system, when potential energy decreases, then entropy also decreases. true false

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon