Gas in a container is at a pressure of 1.6 x 10 Pa and a volume of 4.0 m². What is the work done by the gas if
a. it expands at constant pressure to twice its initial volume?
b. it is compressed at constant pressure to one-quarter of its initial volume?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?