Match these items. 1. de magnete (a) magnetite 2. iron oxide (b) demagnetize 3. man-made magnet (c) william gilbert 4. strength decreases rapidly with distance (d) oersted 5. lines representing the strength and direction of magnetic field (e) lines of force 6. drop or hammer (f) electromagnet 7. small region within a magnet (g) inverse square 8. current-carrying wire has a magnetic field (h) supermagnet 9. very cold (i) domain

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

How many molecules are present in 3 mols of silicon dioxide (sio2)?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)