The pitch of the siren of a moving fire truck changes from high to low as the fire truck passesby. What property of sound wave changes as the fire truck goes by?

What is the elment name for the following atoms? 18 protons, 20 neutrons, and 18 electrons

Which of these is an example of a chemical change? Deflating a rubber balloon Combining rubber with sulfur Stretching an elastic rubber band Erasing pencil marks from a page

The acceleration of the car with two washers added to the string would be

A sample of nitrogen gas in a 1.59-L container exerts a pressure of 1.47 atm at 26 ∘C. What is the pressure if the volume of the container is maintained constant and the temperature is raised to 371 ∘C?

For a material that contains n atoms, how many electron states will there be in a p band

Which of the following is not a source of air pollution related to human activities

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom