A car moves with a velocity of 15 m/s west for 3 seconds. Then, the car moves with a velocity of 15 m/s east for 1 second. What is the total displacement of the
car?

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. this simple process iswhich kind of a change? a.a physical changeb. a chemical changec. a nuclear changed. an ionic change

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?