Approximately how many times denser is the liquid outer core than the solid crust? A. 2
B. 4
C. 5
S. 7

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx hurrim timed

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

What are similarities and differences between refraction, reflection, diffraction and absorption?