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soldi70 [24.7K]
3 years ago
7

Which of the following is the best explanation of why a second control group was included in this experiment

Biology
2 answers:
konstantin123 [22]3 years ago
5 0

The answer is A :)

C - straight up a bad explanation, doesn't make sense

D - the experiment isn't about getting different infections.. It's about curing the common cold

B - they didn't test with different kinds of orange juice

Anestetic [448]3 years ago
5 0
<h2>Answer: To help researchers conclude that results are related to the new </h2><h2>drug and not to the orange juice</h2>

Explanation: correct on apex as of 5/20/19

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The earth is composed of three different chemical layers: core, mantle, and crust. This layering effect is called _____.
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4 years ago
7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second?
nydimaria [60]
Kinetic energy = 0.5*M*V^2 

 Q7-
 
0.5*3*(2^2)= 6J

Q8a- 

0.5*2*(2^2)= 4J
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Q8b-

at the max height, all the kinetic energy is converted to potential energy, 

gravitational potential energy is = M*g*h

that theory would apply if you wanted to work out the maximum height achieved if the balls were thrown upward by rearranging. But, we are simply working out which ball will have more potential energy so:

First ball:
2kg*9.81(g)*10m = 196.2J

Second ball
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The second ball has more potential energy 


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How can you tell the difference between the different phases of mitosis each cell is in?
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I found this photo, i hope it helps

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3 years ago
what are the morphological chemical function and similarities different between lysosomes and peroxisome​
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