Aman expends 100 joules of work to move a box up an inclined plane. the amount of work produced is 80 joules. what is the efficiency?

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

50 pts plz what is the physical state of matter of baking soda.

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.