Is calcium a metal? yes or no answer please

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

In which situation can a mixture always be called a solution

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!