False. They're vibrating strings. Drums have membranes (a membrane is like a sheet)
I'm not that smart but I think it is c I really hope It helps
Answer:2 x 10^-5K^-1
Explanation:
The solution is in the attached file
Answer:
The answer to your question is 784.8 J. None of your answer, did you forget some information?
Explanation:
Data
mass = 20 kg
distance = 4 m
work = ?
Formula
Work = force x distance
Force = mass x gravity
Process
1.- Calculate the weight of the block
Weight = 20 x 9.81
Weight = 196.2 N
2.- Calculate the work done
Work = 196.2 x 4
Work = 784.8 J
