Two cups of the same size are filled to the brim with clear liquids. cup a holds water. cup b contains alcohol. your teacher challenges you to figure out which cup holds water. because of your great science knowledge, you know that all substances have their own special properties. you and your lab partner add an ice cube to each cube. the ice floats in one liquid. you predict it is water. and the ice sinks in the other liquid. you predict that liquid is alcohol. what property of matter did you use to identify the liquids?
a) density
b) mass
c) texture
d) volume

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

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

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?