A student is making an electromagnet to conduct an investigation. She gathers two nails, a 5 cm long wire, a 10 cm long wire, a battery, and a box of paper clips. She starts by coiling the 5 cm wire around the nail and attaches the ends of the wire to the battery. She records the number of paperclips it attracts on her lab sheet during each of three trials. Next, she coils the 10 cm wire around the nail. She connects the ends of the wire to the battery. She completes three trials with this second setup. What do you predict about the number of paperclips that will picked-up in Trial 2 and Trial 3 for the 10 cm wire? Provide evidence from the investigation to support your answer.

Which change in temperature is the smallest? a change of 1 thomson degree a change of 1 kelvin degree a change of 1 fahrenheit degree a change of 1 celsius degree

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter