Explanation:
The magnetic needle of a compass lines up with Earth's magnetic poles.
Answer:
No.
Explanation:
A feather is less dense and thus less force exerted while a rock is very dense thus exerting more force .
" The endocrine system is the collection of glands that produce hormones that regulate metabilism, growth and developement, tissue function.." and others.
The book that weighs less
Answer:
0.0018 W/m²
Explanation:
Power and intensity are related as:

P= 20.0 W (given)
r = 30.0 m (given)

Intensity in decibels:
