2. An iron anchor of density 7870 kgm-3 appears 200 N lighter in water than in air. (a) What is the volume of the anchor? (2 marks) (b) How much does it weigh in air? (2 marks)​

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”

How are positive ions different from neutral atoms