Asample of water initially at 23.0 required an input of 16.9 kj of heat to reach its boiling point at 100.0 c what was the mass of the water ?

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

A5.00 g of a in . g of at aa 5.00 g of b in . g of .?at .