How many independent variables can you have in an experiment for it to be valid?

A nail is attracted to a magnet. What does this tell you about the nail? O A. It is harder than the magnet. O B. It is a poor thermal conductor. O C. It contains iron. O D. It is a good electrical conductor.

Where is the nucleus located in the atom

Which choice is an abiotic factor of an ecosystem A. dogs B. fungi C. ants D. minerals

Which statement explains why large atoms are more reactive than small atoms? A. Large atoms have valence electrons farther from the nucleus and lose them more readily. B.

Name the type of simple machine: a hammer prying a nail out of a piece of wood

1. A food sample is burned in a calorimeter that contains 2000. g of water. The temperature increases from 22.0°C to 44.3 °C. How many Calories does the food sample contain, assuming all of the energy from the food was transferred into the water?

Why doesn't water light on fire? It has all the ingredients except heat! Hydrogen for the flammability factor, oxygen so it can keep burning, and all you need to do is add heat and BOOM you have a flame! 15 pts

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding

As the speed of a particle increases, does its associated wavelenght increase or decrease