Logan observes a paramecium under a microscope. the eyepiece of the microscope has a horizontal scale marked in mm. the paramecium starts at the 65 mm mark and ends up at the 39 mm mark.
what is the paramecium's displacement? express your answer with appropriate units.

Phase changes are chemical changes. true or false

Explain why you think this diagram shows what happened to the carbon in the biodome.

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s