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bearhunter [10]
3 years ago
6

Dan wants to test the effects of different amounts of antibiotic on bacteria. While setting up his experiment he makes sure to u

se the same type of antibiotic, the same type of bacteria, and the same type of incubator for each trial. Which phrase below best describes this part of the experiment?
A.
analyzing results
B.
collecting data
C.
choosing controlled variables
D.
making a prediction
Chemistry
2 answers:
horrorfan [7]3 years ago
8 0
The answer is c, because a variable is kind of a factor for instance would it effect your outcome, and in the question dan is setting it up all the same.
iVinArrow [24]3 years ago
3 0
The answer is C. 
hope this helps.
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suppose you mix 100.0 g of water at 22.6 oc with 75.0 g of water at 75.4 oc. what will be the final temperature of the mixed wat
Arada [10]

The temperature of mixed water is 45.230C under the conditions stated.

<h3>How can the change in temperature when mixing water be calculated?</h3>

T(final) = (m1 T1 + m2 T2) / (m1 + m2), at which m1 and m2 are indeed the weight training of the water in the initial and 2nd canisters, T1 is the water temperature in the first container, and T2 is the water temperature in the second container, can be used to determine the final the water's temperature mixture.

<h3>Briefing:</h3>

The given parameters;

mass of the cold water, m = 100 g

initial temperature of the water, t₁ = 22.6 ⁰C

initial temperature of the hot water, t₂ = 75.4⁰ C

75 g is the hot water's mass.

specific heat capacity of water is 4.184 J/g⁰C

The mixture's final temperature is estimated as follows;

Based on the principle of conservation of energy;

Heat received by the ice water equals heat lost by the hot water.

mcΔθ₂ = mcΔθ₁

75 x 4.184 x (75.4 - T) = 100 x 4.184 x (T - 22.6)

75 x (75.4 - T) = 100 x (T - 22.6)

(75.4 - T) = 1.333(T - 22.6)

75.4 - T = 1.333T - 30.1258

75.4 + 30.1258 = 1.333T + T

105.5258 = 2.333T

T = 45.2318⁰C

To know more about temperature visit :

brainly.com/question/29386637

#SPJ4

5 0
1 year ago
ygyugygygggygygg................................................................................................................
Ahat [919]

please try to keep questions acedemic related

it does no good for questions like this to be on here when others need help, try to keep your questions..

  - Partained to the particular subject
  - presented in the correct language and maner
  - understandable and with all the information needed

no hard feelings, though this question and answer will be deleted by moderators soon so just keep all that in mind ^^

8 0
2 years ago
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