How long must a 400 W electrical engine work in order to produce
300,000 J of work?

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?

What are atoms of the same element with varying number of neutrons

What are some properties of transverse waves?