Which material best absorbs sound waves in a room?
a. heavy curtains
b. hardwood floors
c. brick walls
d. cement floors
Why?
If anyone can answer this, it would mean a lot!!

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.