Aparticular device uses electromagnetism by using electricity to move magnets. the magnets in this device are then used to do work. which device uses electromagnetism in this way?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

How many moles are in 123.0 grams of kclo4?

Which of the following is true about the speed of light? it depends on the wavelength.