The diagram below shows a mercury manometer. Some dry gas is present in the closed space in limb A, while limb B is open. If
atmospheric pressure P, = 100 000 Nm, h = 20 mm and density of
mercury is 13 600 kgm”, determine pressure P, of the gas in mmHg/
(Take g = 10 Nkg-')
Gas
Pa
h
А
B
Mercury​

=force × distance a. work b. velocity c. pressure d. momentum

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

What happens to an isotope during radioactive decay?