Answer:
I don't really know this one sorry
Answer:

Explanation:
v = Velocity of Ferdinand = 5 m/s
= Angle of jump
T = Time taken = 0.6 s
R = Distance between lily pads = 2.4 m
Horizontal range is given by

The angle at which Ferdinand make each of his jumps is 
Answer:
Mass can never be negative. Everything has mass. Just like how they ask you to find area under the graph in maths. If the area is in the 3rd and 4th quadrant, when calculated, you would get negative answer.However, area can not be negative because it is a place/ location. It's exactly the same as mass.
Thiết bị không phải nguồn điện:
Đáp án D
Models help us to understand systems and their properties