What happens when magnesium reacts with fluorine

1. If you are about to be struck by lightning, your hair might stand on end. a. true b. false 2. Not every lightning strike produces thunder. a. true b. false 3.

Valence electrons in an atom are those that are A Held most loosely B Of the lowest energy level C Heavy elements. D Never easily lost.

When temperature increases the kinetic energy of the particles in a material, true or false?

All describe work except A) a team of dogs dragging a sled B) a jokey sitting on a horse C) a bowler lifting a bowling ball

n a location where the train tracks run parallel to a road, a high-speed train traveling at 60 m/s passes a car traveling at 30 m/s in the opposite direction. How long does it take for the train to be 180 m away from the car? Group of answer choices

Describe the factors that form deep currents

A comet is cruising through the solar system at a speed of 50000 kilometers per hour for 4 hours time. What is the total distance traveled by the comet during this time in kilometers, miles, and light years?

A gas in a closed container is heated with 12J of energy, causing the lid of the container to rise 3m with 5N of force. What is the total change in energy?

What are illuminated objects?

During one year a population of blue jays has zero population growth. which must be true about the blue jay population at the end of the year compared to the beginning of the year?