A star has a spectrum with lines indicating the presence of ionized helium. This star should be classified as a (n)

O

A

G

M

What are some properties of sand paper

What happens to the atoms in a scoop of ice cream as it melts?

Which of the following actions describes nuclear fusion A joining of two atoms by a chemical bond B splitting of a big nucleus C joining of small nuclei to produce bigger nuclei D sharing of electrons between two uranium atoms

U test a substance using red litmus paper turns blue based on these results is the substance acidic or base

Which is a sign of chemical change? A. chocolate syrup dissolve in milk B. folding paper changes the size C. toast smells different than bread

How is oxygen and nitrogen alike

Does a gas discharge tube filled with boron emit the same wavelength

a certain solution has a molarity of m = 6.39 mol/l and has a volume of v = 0.550 l what is the value of n

Alcohols are polar molecules. true false

If a normal force of 500 N is acting on two surfaces in contact with a coefficient of friction equal to 0.50, what would be the maximum force of static friction?