Answer:
D: A mathematical model
<em>Hope </em><em>its right </em><em>if</em><em> </em><em>not </em><em>so </em><em>sorry </em><em>:</em><em>)</em>
Answer: The beaker containing pure water has decreased more.
Explanation:
In both cases, the decrease of water level is due to evaporation. We know that evaporation is a surface phenomenon. In the case of salt water, the salt molecules somewhat hinders the evaporation process of the water molecules and hence the salt water evaporates at a slower rate than pure water.
Hence, pure water level falls more.
Fg = m • g so 60kg • 9.8 m/s•s = 588 N
If it starts at rest the initial velocity is 0.
For an acceleration, a, and time, t, the velocity is v=at. Since at t=4, v=7, then a=7/4=1.75m/s^2
