To come to a conclusion would be the initial action that would be the reason behind beginning a scientific investigation.
When you want to prove your point and come to a conclusion, you would start an investigation. Your conclusion helps you form a ending statement.
Answer: 1.96 m/s
Explanation:
Given
Mass of Professor 
Velocity of professor 
mass of chair 
velocity of chair 
Suppose after the collision, v is the common velocity
Conserving momentum
Pangaea is important because it was all the continents in one giant land mass surrounded by water. When the plates shifted and broke apart we got the seven continents we know today. <span />
Answer:
a) t = 4.14 s
b) Speed with which it hits the ground = 40.58 m/s
Explanation:
Using the equations of motion,
g = 9.8 m/s², y = H = 84 m,
Initial velocity, u = 0 m/s,
final velocity, v = ?
Total Time of fall, t = ?
a) y = ut + gt²/2
84 = 0 + 9.8t²/2
4.9t² = 84
t² = 84/4.9
t = 4.14 s
b) v = u + gt
v = 0 + (9.8 × 4.14)
v = 40.58 m/s
