A student investigated how the thickness of insulation affects the cooling of a beaker of hot water. The student wraps cotton wool around the beaker and measure the temperature at the start and after 15 minutes. Describe a method the student could have used to obtain the results shown.

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

Could someone me find the answer to this problem.

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.