Choose the word from the drop-down menu that completes each sentence. A/An star system is made of two stars. A/An star system is made of no more than a few thousand stars. A/An star system is made of more than a million stars. the answer in order is :
Binary
open cluster
globular cluster

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?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?