What will be the outcome of putting litmus paper into rainwater?

a) red paper turns blue, blue paper turns red

b) paper red does not change, blue paper turns red

c) red paper turns blue, blue paper does not change

d) red paper does not change, blue paper does not change

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?