A car can complete a 800 m long lap in 10 s. What is the speed of the car

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

How does the entropy of steam compare to the entropy of ice?