Mark notices he has dropped calls on his cell phone when he walks into his bedroom. his friend told him to try and were wrap aluminum foil around his phone to get better signal mark talks on the phone 3 times while walking into his bedroom and drops 2 of the 3 cause he wraps his phone and in aluminum foil on talks on the phone 3 more times while walking into his bedroom with a newmanham foil on his fawn he only drops one call. what's the independent variable what's the dependent variable and what's the control variable

Dwayne filled a small balloon with air at 298.5 k. he put the balloon into a bucket of water, and the water level in the bucket increased by 0.54 liter. if dwayne puts the balloon into a bucket of ice water at 273.15 k and waits for the air inside the balloon come to the same temperature, what will the volume of the balloon be? assume the pressure inside the balloon doesn’t change. type the correct answer in the box. express your answer to the correct number of significant figures. the volume of the balloon at 273.15 k is liters.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

How might this scientific phenomena be explained? a paper clip floats on water.