Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”
Answer: The answer is A
Explanation: This is because when driving gives you force and you all the sudden acceleration is messes up the force.
Answer:
The most critical policy issue facing America today is the rivalry between Democrats and Republicans, Antifa and Trump supporters, left and right, progressives and conservatives; in short, the inherent social conflict in American society today, which is creating a series of increasingly serious social confrontations among the nation's citizens. Clear examples of this situation are the assassination of George Floyd, the assault on the Capitol by Trump's followers, the constant excesses of Antifa in his mobilizations, and the growing tension between both political groups.
Unfortunately, our government is not taking the necessary measures to unite the nation, but rather each political party operates according to its own interests, increasing the severity of the problem more and more.
The answer is, A. seafloor spreading occurs
Answer:
c) thermal pollution
Explanation:
aka heat pollution, occurs when heat released into water or air produces undesirable effects.
