The colors of light has a direct relationship with which characteristics of the wave?

Which material produces static charge when rubbed?

Define the meaning of the unalienable rights of life liberty and persuit of happiness

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.