Which best describes the purpose of a controlled experiment?

Answers

Answer 1

Answer:

A controlled experiment is an experimental setup designed to test the hypotheses. It has one or more conditions (independent variables) and measures (dependent variables). It is necessary to change more than one variable, but all os the experimental conditions will be controlled so that only the variables being examined change and the amount or way of change is measured.

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Prior to the World Wide Web, computer users could get information only in the form of

Which formula is MgI2

Answers

Answer:

Magnesium iodide (MgI2)

A faster pulse rate results in a _____ overall heat input. Answer options are 1. Higher or 2. Lower

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a faster pulse rate results in a higher overall heat input

Answer:

higher

Explana

Cohesion is the tendency for the same type of molecules to stick together. TRUE or FALSE

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true

cohesion is the tendency for the same type of molecules to stick together!

An atom of argon rarely bonds to an atom of another element because an argon atom has(1) 8 valence electrons
(2) 2 electrons in the first shell
(3) 3 electron shells
(4) 22 neutrons

Answers

The answer is (1) 8 valence electrons. Argon, being a noble gas, already possesses a full octet of valence electrons and is, therefore, very, very stable. It has an almost indomitable tendency to retain that octet. That is why it so rarely participates in any sort of bonding.

How can an iceberg (temperature=0 Celsius) have more energy than a burning match head (temperature=230 Celsius)?

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A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.

What is Kinetic energy ?

Kinetic energy is a form of energy in which an object possesses due to its motion. The kinetic energy of an object is depends up on both the velocity and mass. The S.I unit of Kinetic energy is Joules.

The temperature of burning match head is given 230 degree Celsius and temperature of iceberg is given 0 degree Celsius. A burning match head has a higher temperature than the iceberg due to average molecule in the burning match head moves faster than the average molecule in the iceberg.

Thus, from above conclusion we can say that A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.

Learn more about the Kinetic Energy here: brainly.com/question/114210

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temperature is the average energy of each particle and does not really give you an indication of the total internal energy. That being said, total internal energy is the sum of all of the molecule's energy in a given object so it would make sense that an ice berg (having a huge number molecules at a lower average energy) would have more internal energy than a match head (having a much smaller number of molecules at a higher average energy). Basically, the fact that ice bergs tend to be huge and contain much more molecules than a match head, means that ice bergs can have a larger total internal energy which means they store more energy.

I hope this helps.

A catalyzed reaction will have a ____ activation energy, and this leads to a _____ in the reaction rate. A) lower, decrease
B) lower, increase
C) higher, decrease
D) higher, increase

Answers

I chose d and got it wrong. The correct answer is b.

The answer is D, a catalyst speeds up the reaction rate so a catalyzed reaction will have higher activation energy thus and increase in rate of reaction.

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