Answer:
The correct answer is <u>option (A) that is KEA > KEB .</u>
Explanation:
Let us calculate -
If the object is straighten up and inclined plane , the work done is
The change in kinetic energy is ,
At the top of the inclined plane , the velocity is zero
So,
From the work energy theorem , we have 
in case of friction , so
For object A-
For object B
Thus , larger mass is going to mean less total work and a lower kinetic energy .
From the above results , we get
<u>Therefore , option A is correct .</u>
Answer:
I think it's a chemical change.
Answer:
Because the output force is greater than the input force, the input distance must be greater than the output distance.
Explanation:
You have to find the calculate<span> the circumference first then you can just multiply the diameter by π, which is about 3.142. That gives you the distance for each </span>revolution<span>. Then you can multiply by the </span>number of revolutions<span> per minute.
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Answer:
salt water, air and vinegar are homogeneous solutions.
Explanation:
A solution which consists of particles of same proportion is known as a homogeneous solution. Whereas a solution which consists of particles of different proportion is known as a heterogeneous solution.
Salt and water are homogeneous solutions as salt completely disperses in water and forms a clear solution as the particles of salt and water are in proportion.
Air is composed of different gases like nitrogen, oxygen etc are all mixed in fixed ratio. Therefore, air is a homogeneous mixture.
Sand and water are heterogeneous solution as the ration of mixing is different and more over sand particles can be separated from water. Thus, it is not a homogeneous mixture.
Vinegar is also a homogeneous solution as it is composed of acetic acid and water which are mixed in fixed proportion.
Cement is a heterogeneous mixture as it is composed of a number of different substances mixed in different proportions.
Thus, we can conclude that salt water, air and vinegar are homogeneous solutions.
