Answer:
I dunno for sure but i think its C " reduced wear and tear".
Explanation:
I dont really have an explanation for it, it just kinda feels right. Ill update this with the actual answer when i submit the test.
Answer:
your questions are not clear
-Both states of matter are the same temperature
-false( not very sure for this)
Answer:
Tension in the string will be 19.293 N
Explanation:
We have given length of the string r = 42.1 cm = 0.421 m
Mass of the stone m = 1000 gram
We know that 1000 gram = 1 kg
Velocity in the circular path v = 2.85 m/sec
We have to find the tension in the string
Tension in the string will be equal to centripetal force
So tension , here m is mass, v is velocity and r is length of the string
So tension in the string
So tension in the string will be equal to 19.293 N