Liz and Justin both look for the luster of the same mineral. Liz examines the samples under the reading light in her bedroom, while Justin takes his sample and a flashlight into a dark room. What statement best explains why the two got different results? None of Liz's samples had luster. Liz's light was too bright to see luster. They used different procedures to test for luster. Justin wore glasses that helped him see more details.

Identify the type of synthetic material used in each object

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

How do the kidneys affect homeostasis