What happens to a bar of metal when its heated?

How many tips does a snowflake have?

As a tree respires, it takes in carbon dioxide, CO2, and water vapor, H2O, from the air while also releasing oxygen, O2. Does the tree lose or gain weight as it respires? Explain.

A train travels 120 km in 2 hours and 30 minutes. what is it average speed?

Mercury's natural state is where the atoms are close to each other but are still free to pass by each other. In which state (s) could mercury naturally exist? gas liquid solid or liquid solid or gas

He discovered that the orbits of planets are ellipses.

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect

When a raw egg gets heated into an edible egg is this considered a physical or chemical change?

Starting at its rightmost position, it takes 2 seconds for the pendulum of a grandfather clock to swing a horizontal distance of 18 inches from right to left and 2 seconds for the pendulum to swing back from left to right.

A question about a moral issue is answered by examining facts rather than opinions. is generally considered a scientific question. cannot be answered with scientific methods. cannot be debated through discussion.