Answer: C Controlled variables with only one varied independent variable
Explanation: I believe this is the answer because she does not have only one person that listen to all of the music so the people can vary how there pulses would act to music depending on their taste and age. Elaina has a hypothesis and she did do an experiment but she did not the experiment correctly.
Hope this helps :3
My hypothesis would be that the electricity went off and the power turned on which caused everything plugged in and everything using WiFi to reset
A) is 6.49
b) is 6.28
c) is 9.77
d) ph is 11.77
Answer:
Cu + HNO3 → Cu(NO3)2 + <u>H2O</u> + <u>NO2</u>
Cu + 4HNO3 → Cu(NO3)2 + <u>2H2O</u> + <u>2NO2 </u>(balanced equation)