Jamal draws the circuit diagram shown. A rectangular box of lines with the long horizontal side and an extra vertical line at the midpoint of the box. The left side has a circle with an X in it and a small circle connected to another small circle by a vertical line. The top side has a small circle connected to another small circle by a horizontal line to the right of the midpoint of the line. The right side has a stack of horizontal lines, which are from top very short, short, very short, short. The bottom line has a zigzag before the midpoint and a zigzag after the midpoint. The extra line has 2 circles with X's in them. How many of each component are shown in the diagram? Select four options. one battery two switches two batteries two resistors three light bulbs three switches

If the sun were to become a black hole, what would happen to earth? it is impossible to know the results. it would be sucked in very rapidly. it would continue in the same orbit. it would be sucked in very slowly. 3. which type of radiation us map the galaxy? visible light infrared 21 cm radio waves ultraviolet 4. henrietta leavitt found that the brighter appearing cepheids always had longer periods of light variation. this is an expression of what? period-luminosity relation luminosity function hertzsprung-russell diagram mass-luminosity relation 5. what is the surface or boundary of a black hole called? quasar active galaxy event horizon seyfert point 6. edwin hubble's discovery of a cepheid variable in the andromeda nebula led him to conclude that the nebula was what? a distant galaxy composed of hydrogen a supernova remnant the birthplace of stars 7. earth is near the center of the milky way galaxy. true false 8. how long does it take the sun to revolve around the center of the galaxy? two hundred thousand years two hundred million years two hundred years two hundred billion years