Density is a force that acts on an object immersed in liquid

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

What are the pros and cons of transect sampling?

In which part of the body is a ball-and-socket joint found?