Natalie is using a three-dimensional representation to study the parts of the human heart. Isaiah is working in a laboratory to test the hypothesis that plant
grow taller in green light than in white light. Which of the following best
compares their activities?
F. Natalie is conducting a scientific investigation, and Isaiah is not.
G. Natalie is not conducting a scientific investigation, and Isaiah is.
H. Natalie is conducting an experiment, and Isaiah is conducting a field study
L. Natalie is investigating a scientific model, and Isaiah is conducting
an experiment.

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.