Estimate how many times farther away the Hercules cluster is than the Virgo Cluster. Show how you made your estimate. Be sure and measure at least five galaxies in each cluster. Avoid odd-looking galaxies. Virgo 1: ; Hercules 1:
Virgo 2: ; Hercules 2:
Virgo 3: ; Hercules 3:
Virgo 4: ; Hercules 4:
Virgo 5: ; Hercules 5:
Virgo average: ; Hercules average:

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Which of the following are appropriate acceleration units?