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enot [183]
3 years ago
8

In an experiment, what are the controls?

Chemistry
2 answers:
Vedmedyk [2.9K]3 years ago
6 0
A variable that you must keep constant
Burka [1]3 years ago
3 0
The last one on that list would be your answer
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Calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?
astraxan [27]

Answer:

Explanation:The equation for this is F = -GmM/R^2 where the minus sign says the force is attractive m is 10 kg, M is 20 kg and R is 5 meters. If you crunch the numbers you get an answer of:

7 0
3 years ago
In a DNA molecule, if 38% of the molecular bases are C (cytosine), what percent of the bases are T (thymine)?
andreyandreev [35.5K]

Answer:

thymine is 19%

Explanation:

Acc to Chargaff's rule, amount of Adenine= amount of Thymine as well as amount of Guanine= amount of Cytosine. Amount left for Thymine and Adenine is 38% now. Since both Adenine and Thymine are, again in equal quantities, so therefore percentage of thymine is 19%.

8 0
4 years ago
If there is a loss of 5.63 x 10-7kg of mass in a nuclear reaction, how many Joules of energy would be released? Recall that c =
Fudgin [204]
Thank you for posting your question here at brainly. 

E = mc^2 
<span>where E is the energy in joules, </span>
<span>m is the mass in kilograms, </span>
<span>and c is the speed of light. </span>

<span>E = mc^2 </span>
<span>E = (5.63 x 10^-7 kg)(3 x 10^8 m/s)^2 </span>
<span>E = 5.07 x 10^10 J </span>


5 0
4 years ago
How did worldwide infant mortality and life expectancy changed between 1900 ?
Pavel [41]
<span>Infant mortality dropped significantly - raising the average age at death. It depends on how you look at the statistics. </span>
3 0
4 years ago
Read 2 more answers
Which must be the same when comparing 1 mol of oxygen gas, O2, with 1 mol of carbon monoxide gas, CO?
Ber [7]

Answer: C. The Number of Molecules

Explanation: I just took the test, it's correct.

6 0
4 years ago
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