Cual es la bibliografia del hidroxido de potasio? ¡urgente¡¡¡¡

The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?