Answer:
Answer:
Propotionality is important
Explanation:
Explanation:
Given the velocity-time graph of an object.
The slope of a velocity-time graph gives the acceleration acting on the object.
From the graph, we can see that the slope of the graph is zero. That is, the velocity of the object is constant and hence the net acceleration acting on the object is zero.
From Newton's second law, the net force acting on an object is given by the product of the mass of the object and its velocity. Therefore when the acceleration of the object is zero, the net force on the object is also zero.
Therefore the net force acting on the given object is zero. Hence, the correct answer is option A.
Hey there,
So first we need to know how much molecules are there in 4 grams of hydrogen right?
In one gram of hydrogen there are 6.0221415 multiplied by 10^25 molecules right?(this number is known as avagadors constant )
And to make one molecule of water u need two molecules of hydrogen and one of oxygen.
And oxygen is unlimited right?
So when we have 6.0221415 grams of hydrogen tow if these are required to make one water.
So divide that by two and you get 3.0110704 multiplied by 10^25.
So the answer is you can make the above number of water molecules.
Hope this helps!!!
Answer:
The correct option is D
Explanation:
From the question we are told that
The refractive index of oil film is 
The thickness is 
Generally for constructive interference
![2t = [m + \frac{1}{2} ]* \frac{\lambda}{k}](https://tex.z-dn.net/?f=2t%20%20%3D%20%20%5Bm%20%20%2B%20%5Cfrac%7B1%7D%7B2%7D%20%5D%2A%20%20%5Cfrac%7B%5Clambda%7D%7Bk%7D)
For reflection of a bright fringe m = 1
=> ![2 * (290*10^{-9}) = [1 + \frac{1}{2} ]* \frac{\lambda}{1.48}](https://tex.z-dn.net/?f=2%20%2A%20%28290%2A10%5E%7B-9%7D%29%20%20%3D%20%20%5B1%20%20%2B%20%5Cfrac%7B1%7D%7B2%7D%20%5D%2A%20%20%5Cfrac%7B%5Clambda%7D%7B1.48%7D)
=> 
This wavelength fall in the range of a yellow light
