Explain how a magnetic field works in your own words (1-3 sentences) :

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Diamond will scratch quartz. true or false

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.