yes it is correct
the difference would be that rocks are hard and most likely dirty and cotton balls come from a package meaning their clean cotton balls are white and fluffy rocks come from outside and are dirty
Denim is strong because of its tight, thick weave of cotton. The fabric was originally marketed to those building the Transcontinental Railroad, a job which was very hard on your clothes.
I don't know the reason. A lot of really clever people have used it, but I think it's more or less useless. I used to like it, before I really thought about it. The idea is that the ball distorts the rubber sheet just like mass distorts space. The distortion of space (spacetime to be exact) is the basis of our modern understanding of gravity. Some people like this analogy until you point out the problems. Some things are just really hard to explain. It was simpler with Isaac Newton. He just had no explanation for gravity. OK, it's only an analogy, but here's one problem: The rubber sheet is only 2 dimensional, of course. Here's another problem : The whole analogy is meant to "explain" gravity. What causes the ball (mass) to distort the sheet (space)? The ball is pulled towards the Earth by.........gravity. Yes, but no , well, I mean........
HARD
Hard is an adverb in the sentence. The word hard does not require 'ly' to make it an adverb
hard tack..............
As hard as a brick
A brick means the ball bounced hard off of the backboard, like if you threw the basketball hard at it.
because cotton is hard to burn.
The cotton! HAHAHAHAHAHAHAHA!
the chocolate is as hard as a brick
hard brick
brick
First of all, you pick up the brick and grip it tighly in your hand, then hit the top of the TV hard with the brick. Then, whack the screen.
Hello. I like cake Hello. I like cake
Cotton picking is pulling the soft cotton out of the hard boll that has opened when the cotton is ready to be harvested. Cotton pulling is harvesting the cotton by pulling the entire opened boll, with the cotton in it.
you have to use your hands and work- work is hard