Two students are riding on a sled down a 100 m hill. It takes 25 seconds to 2 points reach the bottom of the hill. What is their speed?"
250 m/s
250 mph
4 m/s
0.25 m/s

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.

If an atom has 12 protons and 13 neutrons

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.