Answer:
for any object in motion , distance is always greater than displacement
I think if I was a researcher I would review my work or the sources I use, True
Answer:
Because the molecules are not packed together as much than the air, in a fixed volume of helium there are fewer particles than in the same fixed volume of air.
This means that the mass of the fixed volume of helium is smaller than the one of air, and then the density, defined as mass/volume, is also smaller.
This is why the balloon floats, because the air is denser, it tries to go down, pushing the ballon upside.
The case is similar for a piece of metal in water, as the metal is way denser than the water, the metal will sink, but for something not as dense, like a balloon with air, the balloon will remain in the surface of the water.
We know, Atomic mass = Atomic number + number of neutrons
Here, Atomic mass - 50 = number of neutrons [ as A.N. = 50 ]
So, According to our info. only option B can be correct, as the difference between atomic mass & number of neutrons is 50, which is atomic number of Tin (Sb)
In short, Your Answer would be Option B
Hope this helps!
Answer:
Part c)
Explanation:
Part a)
As per Coulomb's law we know that force on a charge placed in electrostatic field is given as
now acceleration of charge is given as
now if charge moved through the distance D in electric field and its speed changes from vo to fraction f of speed of light c
then we will have
so we have
Part b)
Now using work energy theorem we can say that total work done by electric force on moving charge will convert into kinetic energy
So we will have
so we have
Part c)
Now if an electron is accelerated using this field
then we have
so we have