The earth is not a uniform sphere but has regions of varying density. consider a simple model of the earth divided into three regions—inner core, outer core, and mantle. each region is taken to have a unique constant density (the average density of that region in the real earth):
a. use this model to predict the average density of the entire earth.
b. the measured radius of the earth is 6371km and its mass is 5.974*1024kg use this data to determine the actual average density of the earth.

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Current from a charged capacitor lights a bulb. as time goes on the brightness of the