4. A certain roller coaster increases the speed of its cars as it raises them to the top of the incline. Suppose the cars move at 2.3 m/s at the base of
the incline and are moving at 46.7 m/s at the top of the incline. What is
the magnitude of the net acceleration if it is uniform acceleration and
takes place in 7.0 s?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

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?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?