Exercises Suppose that a pancake recipe designed to feed three people
calls for 600 mL of flour. How many milliliters of flour
would you use if you
wanted to extend the recipe to feed
five people?

concave lenses are used here. they spread the light out before it reaches the convex lens in the eye, therefore letting the image focus directly on the retina. hyperopia is known to you probably as farsightedness.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.