Which of the following is true?
a plant cells are unaffected when water is scarce
b some substances must be dissolved in water before they can be used
c water is important to some organisms
d all organisms obtain water through food

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:

How long will it take a car traveling of a constant speed of 45m/s to cover the distance of a 2.5km?

What is the electric potential at a distance of 1.2 m from a 7.5 µc point charge? 5.6 × 104 v 8.1 × 104 v 5.6 × 1010 v 8.1 × 1010 v