Answer:
I think D sorry if I'm wrong
Answer: The period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m is 5.73 sec.
Explanation:
Given: Mass = 5 kg
Spring constant = 6 N/m
Formula used to calculate period is as follows.

where,
T = period
m = mass
k = spring constant
Substitute the values into above formula as follows.

Thus, we can conclude that the period of a spring if it has a mass of 5 kg and a spring constant of 6 N/m is 5.73 sec.
Answer:
About 2.19 seconds
Explanation:

Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:

Hope this helps!
1. Use renewable energy sources (eg. wind, solar etc.)
2. Encourage citizens to use public transport
3. Better waste management systems (instead of burning waste, recycle etc.)
that’s all i could think of :)