A heat engine has a thermal efficiency of 0.46. During each cycle, it absorbs 780 J of heat from a high-temperature reservoir. How much waste heat does it discard each cycle. A) 420 J
B) 200J
C) 780 J
D) 360 J

In a laboratory, nakisha mixes sodium hydroxide solution with an indicator called phenolphthalein. when combined, they create a pink solution. nakisha wonders if mixing other solutions with phenolphthalein will also create this pink color. how could she use the scientific inquiry process to explore it further?

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.