Mathematics, 29.10.2020 01:00 karlacr5117

I NEED HELP PLEASE A researcher studies the rate of progress of a chemical reaction. The researcher fixes the temperature and pressure, varies the amount of catalyst used over a range of quantities, and observes the resulting reaction rate in each case.

Which statement BEST describes why the investigation is an experimental study?

There is more than one independent variable to study.

The researcher manipulates at least one independent variable.

It is possible to get data with a range of values of an independent variable.

There is a cause-effect relation between the independent and dependent variables.

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 17:00, MrKrinkle77

Igor stravinsky tires sells approximately 3,760,000 car tires and 1,200,000 truck tires each year. about 47,000,000 care tires and 26,000,00 truck tires are sold each year in the united states. what is stravinsky's market share in each of these two markets (cars and trucks)?

Answers: 1

continue

Mathematics, 21.06.2019 21:30, oliup567

(c) the diagram shows the first three shapes of a matchsticks arrangement. first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

Answers: 2

continue

Mathematics, 21.06.2019 22:30, hala201490

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

Answers: 1

continue

Mathematics, 21.06.2019 23:00, gggg79

X-10/4 when x = –18 a 7 b –2 c –7 d 2

Answers: 1

continue

You know the right answer?

I NEED HELP PLEASE A researcher studies the rate of progress of a chemical reaction. The researcher...