Which of the following would be a best choice as a core for an electromagnet? a. plastic straw b. copper wire c. iron nail

Which statement names a chemical property of iron? a: it is dense b: it becomes rusted c: it’s hard to bend d: it has a melting point

Amylase becomes denatured at a temperature of 80°c. during an experiment to study the effect of varyingtemperature on enzyme activity, amylase’s reactivity with starch was measured at body temperature (37°c), andthen again at an increased temperature of 42°c. how would this increase in temperature affect the experiment

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring