When two objects having different masses collide, they move away from each other at different speeds. Which is true of the forces exerted at the moment of impact? A. The forces exerted when they collide are equal and opposing.
B. The forces exerted when they collide are unequal and opposing.
C. The forces exerted when they collide are equal and in the same direction.
D. The forces exerted when they collide are unequal and in the same direction.

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

Which element is found in both dna and proteins

In what for do plants utilize nitrogen? why do they need nitrogen?