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nikitadnepr [17]
3 years ago
9

Astronomers have observed that the universe is expanding and is accelerating in all directions. Using this evidence, astronomers

have hypothesized that a huge explosion called the big bang created the universe. Which of the following correctly describes the big bang?
Fact


Theory


Opinion


None of these
A scientific theory is a well-tested explanation for a wide range of observations or experimental results. A hypothesis is a possible answer to a question. When does a hypothesis become a scientific theory?


after the hypothesis is first formed by a scientist


after a hypothesis is shown to correct in one experiment


after the hypothesis has been confirmed through extensive testing


after a competing hypothesis has failed

Nicolas has completed the experimental portion of the lab. Which of these should he do while he works on the analysis questions?


talk to his friends who are still collecting data


keep his safety goggles on


keep his gloves on


work on another experiment he thought of

How do the independent and dependent variables in an experiment compare?


They are the exact same as one another.


They have no effect on one another.


The dependent variable controls the independent variable.


The independent variable controls the dependent variable.

I NEED HELP !!!! ASAP 

please help
Chemistry
1 answer:
andrew-mc [135]3 years ago
3 0

Dependant Variable is your answer :D

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Determine how many mm of Hg are equal to 5.3 atm of pressure
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4028 mm of Hg...........
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3 years ago
A 50.0 g sample of scandium, sc, is heated by exposure to 1.50 x 10 3 j. The temperature of the sc is raised by 61.1 o
statuscvo [17]

Given mass of Scandium = 50.0 g

Increase in temperature of the metal when heated = 61.1^{0}C

Heat absorbed by Scandium = 1.50*10^{3}J

The equation showing the relationship between heat, mass, specific heat and temperature change:

Q = m C (deltaT)

Where Q is heat = 1.50*10^{3}J

m is mass = 50.0 g

ΔT = 61.1^{0}C

On plugging in the values and solving for C(specific heat) we get,

1.50*10^{3}J=50.0g(C)(61.1^{0}C)

C = 0.491\frac{J}{g^{0}C }

Specific heat of the metal = 0.491\frac{J}{g^{0}C }

7 0
3 years ago
The last intermediate in citric acid cycle is:_________
GenaCL600 [577]

The last intermediate in citric acid cycle is Oxaloacetic acid.

<h3>What is Citric Acid Cycle?</h3>

Organic molecule HOC(CO2H)(CH2CO2H)2 is the chemical formula for citric acid. It is a weak organic acid that is colorless. Citrus fruits naturally contain it. It is a biochemical intermediary in the citric acid cycle, which is a component of all aerobic organisms' metabolism.

Every year, more than two million tons of citric acid are produced. It is frequently used as a flavoring, an acidifier, and a chelating agent.

Citrates, which include salts, esters, and the polyatomic anion present in solution, are derivatives of citric acid. Trisodium citrate is an example of the former; triethyl citrate is an example of an ester.

Learn more about citric acid with the help of the given link:

brainly.com/question/15582668

#SPJ4

7 0
1 year ago
Can somebody help me please! Help would be much appreciated :))
vivado [14]

Answer:

The first picture shows how the two H athoms finds each other. The second one, how these H athoms start's to form a covalent bond describing it by Lewi's estructure. And the last one, shows how the two athoms of H formed an H2 molecula.

Explanation:

7 0
3 years ago
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