I have an eye but still cannot see.

Who am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What breaks yet never falls, and what falls yet never breaks?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What month of the year has 28 days?

I know a nine-letter word having only one vowel.
Do you ?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What has one letter and starts with an E?