Step 1: Gather materials and necessary information. a) You will collect the following information about your element: • Periodic table information including type of element, atomic number, atomic mass, number of protons, number of electrons, number of neutrons, period number, group number, and group name • Physical and chemical properties of the element • When, where, and by whom the element was discovered • Where the element is found and how it is obtained • Uses for the element and/or products made from the element • Images of the element b) Be sure to keep a list of your references so you can cite them later. c) Ask your teacher where you should save your presentation as you work on it. Your teacher may also have specific guidelines about the file name you should use.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Hydrogen and helium are both members of?