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Marina CMI [18]
3 years ago
6

For which of these questions could a testable hypothesis be developed? Check all that apply. A. Are gases better than solids? B.

Do different liquids freeze at the same rate? C. Do cookies taste better when they are baked in a gas oven or in an electric oven? D. Does temperature affect the strength of a magnet? E. Does the color of water affect how quickly it evaporates?
Physics
2 answers:
Shalnov [3]3 years ago
7 0

Testable hypotheses could be developed for questions  <em>B,  D,  and  E</em> .

The main problem with  A  and  C  is the word "better".  This is a rubber word.  It means different things to different people, and it can mean different things to the same person at different times.  It's always a matter of opinion, it has no unique units of measure, and there is no concrete way to measure it.  Not good for developing a testable hypothesis.

OlgaM077 [116]3 years ago
3 0

Answer:

B, D, E

Explanation:

When determining if something could have a testable hypothesis you have to determine if you could test the hypothesis you come up with. An example hypothesis could be for B saying If I put different liquids in the freezer at the same time, then (liquid example) would freeze the fatest (or slowest) this is something you can test and can be measured by a test with data.

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Consider the uniform electric field \vec{E} =(4000~\hat{j}+3000~\hat{k})~\text{N/C} ​E ​⃗ ​​ =(4000 ​j ​^ ​​ +3000 ​k ​^ ​​ ) N/
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Answer:

Electric flux \phi=31562.63\ Nm^2/C

Explanation:

Given that,

Electric field acting on the circular area, E=(4000j+3000k)\ N/C

We need to find the electric flux through a circular area of radius 1.83 m that lies in the xy-plane. It lies in xy plane, such that the area vector point in z direction. The electric flux is given by :

\phi=E{\cdot}A

\phi=(4000j+3000k){\cdot}Ak

Using dot product properties, we get the value of electric flux as :

\phi=3000\times Ak

\phi=3000\times \pi (1.83)^2

\phi=31562.63\ Nm^2/C

So, the electric flux through a circular area is \phi=31562.63\ Nm^2/C . Hence, this is the required solution.          

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Three deer, A, B, and C, are grazing in a field. Deer B is located 62m from deer A at an angle of 51° north of West. Deer C is l
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4 years ago
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Answer:

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Explanation:

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In this case, Ethan find it easier to push the box on the marble floor, because marble is smoother than the carpet and so friction is weaker, while for the carpeted floor the coefficient of friction is larger and so the friction is stronger, making it more difficult to push the box.

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