59. A pycnometer is a device used to determine density. It weighs 20.455 g empty and 31.486 g when filled with
water (d = 1.000 g/cm'). Pieces of an alloy are put into
the empty, dry pycnometer. The mass of the alloy and
Pycnlometer is 28.695 g. Water is added to the alloy to
exactly fill the pycnometer. The mass of the pycnometer.
water, and alloy is 38.689 g. What is the density of the
allov?

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt

Which of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility

Convert a speed of 201 cm/s to units of inches per minute. also, show the unit analysis by dragging components into the unit‑factor slots.