What effect does distance have on the force of gravity ? a) increasing the distance between two objects increases the gravitational force
b) decreasing the distance between two objects decreases the gravitational force
c) increasing the distance between two objects decreases the gravitational force
d) distance is not a factor in determining the force of gravity

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

What are the student's observations and inferences before he starts his investigation?

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.