Answer:
B. Solid rock breaks apart.
Explanation:
Answer:

Explanation:
Given:
- spring constant of the spring attached to the input piston,

- mass subjected to the output plunger,

<u>Now, the force due to the mass:</u>



<u>Compression in Spring:</u>



or

Answer:
D in pairs
Explanation:
Forces always come in pairs - equal and opposite action-reaction force pairs.
Answer:
01:20 (1 minute 20 seconds)
Explanation:
subtract the starting time from the stopping time to get the time used: 02:10 - 00:50 = 01:20