Which phrase describes the purpose of today's wind farms?

to use wind power to make chemical energy

to use geothermal energy for power

to provide power to hydrogen fuel cells

to change wind into mechanical energy to make electricity

Given the number of valence electrons in neutral atoms, predict the charge of the ions each will form. one valence electron two valence electrons six valence electrons seven valence electrons eight valence electrons a. generally does not form ions b.

Which is most likely the goal of selective breeding on a farm

When adding the measurements 42.1014 g + 190.5 g, the answer has ___ significant figures.

The electric force between a charged foam cup and a positively charged metal sphere is 2.12 newtons. If the charge on the cup is 2.0 * 10-6 coulombs and the charge on the metal sphere is 2.

Biomes have distinctive temperature and precipitation ranges true or false

How many liters of space will 7.80 moles of methane gas (CH4) occupy at STP

Which is an example of the flow of heat through conduction? Hot air rises to the top of the room A hot-air balloon rises into the sky Heat flows from a hot liquid to a pot handle Heat causes winds to blow from the water to the land

Jin listed some common thermal insulators and conductors in a chart. A 2-column table with 2 rows. The first column labeled Insulators has entries rubber, air. The second column labeled Conductors has entries copper, X.

A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of carbon dioxide produced by the reaction of of oxygen.

Which of the following statements about transition metals is true? a. They are never found uncombined in nature. b. They include familiar metals such as gold, silver, copper, and nickel. c.