Please help An electrical device has a resistance of 60 Ω and requires a current of 0.15 A to work properly. How many 1.5 V cells does the device require?

What element breaks down into yttrium-90?

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour