A scientist designs some experiments to record how various substances change. She then reviewed her results. Which of the investigations listed below is an example of how the substance changed chemically? 1. Hydrochloric acid is stored inside plastic containers.
2. Sodium metal reacts violently and explodes with water.
3. After heating aluminum in a crucible, it began melting at 1200 degrees F
4. Grinding Copper sulfate allowed it to be dissolved much quicker.

How are calculation for velocity and speed different

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d

What is similar between metals and suspensions