Which of the following is a limited resource, which can take longer to be replenished than it takes to be used up?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Gunpowder residue is most likely to show up where on a shooters hands

The reason a penny thrown straight up inside a bus will come back to your hand is that you,the bus,the air inside the bus, and the penny are all moving at the same velocity. true or false