Answer:
The electromotive force is the voltage measured across the cell terminals when "NO" current is being drawn. That is why electromotive forces are used in Wheatstone Bridges which measure the resistance of an external object.
Just measuring the voltage across a cell does not give one the true EMF because current drawn from the cell will cause a reduction of voltage of I * R where R is the internal resistance of the cell.
Answer:
Water stay in the bucket if the bucket is spin upside down and fast because due to centripetal force.
Explanation:
When the bucket is at highest point in the circular motion then there will be three forces work centripetal force in upward direction ann normal and weight will work in downward direction.
By newton law,
centripetal force=weight + normal force.
If the water will stay in the bucket in upside direction then there will be normal force is positive which means the centripetal force is greater than weight.
And to increase the centripetal force velocity should be greater because it depends on velocity.
The practical application of centripetal force are discussed below:
(a) Turning of the car on a banked road or in circular track.
(b) Revolution of the earth around the sun.
Answer:
The correct option is energy levels
Explanation:
Rutherford's model of an atom suggests that an atom has a tiny positively charged central mass (now called the nucleus) which is surrounded by electrons (negatively charged) in a <em>cloud</em>-like manner.
Bohr's model went a bit further than the Rutherford's model in describing an atom by suggesting that the electrons which surrounds in the nucleus travel in <u>fixed circular orbits</u>. This description by <em>Bohr was able to describe the energy levels of orbitals which assumes that smallest orbitals have the lowest energy while the largest orbitals have the highest energy</em>.
!ND he falls down or whatta is this a riddle or a question we can't help you if you are not clear gosh people ...
the answer is increases concentrations of solids.
hope i helped