Kim took 5 hours to complete a journey with an average speed of 80km/h. For the first 3 hours, she travelled at an average speed of 60 km/h. What was her average speed for the remaining time of the journey?

Explain the difference in reactivity of the elements based on their electron configurations.

The center of the milky way most likely contains a. empty space. b. a red giant star. c. a globular cluster. d. a supermassive black hole.

The text compares alternating current with direct current. how are they different? a alternating current reverses direction in the electrical wiring. direct current flows in one direction only. b direct current reverses direction in the electrical wiring. alternating current flows in one direction only. c direct current is powered by solar energy. alternating current is powered by electrical energy. d alternating current does not move in the electrical wiring. direct current does move in the electrical wiring.