How many seconds are in 3 hours

To find out why bread left on a kitchen counter eventually mold is an example of what?

How many protons and neutrons are in one atom of / begin{matrix}30//14/end{matrix} 30 14 si?

If there are 4 different gases in a room and the room seems to have a high pressure within it because you keep getting headaches, what would you do to find the total amount of pressure in the room?

What is the connotation and denotation of confident

What are some different types of gasses.

Why is it important for scientist to review and repeat the work of other scientists?

A gamma ray has a very high frequency of about 1019 s-1. what is the wavelength of the gamma ray?

What is the first quantum number of a 1s2 electron in phosphorus, 1s22s22p63s23p3?

What are two objects used to find density

How many helium atoms are there in a helium blimp containing 537 kg of helium? express the number of helium atoms numerically?