Question

A metallic body of material with density of 8000 kg/m has a cavity i
nside. A spring balance shows its mass to be
10.0 kg in air and 7.5 kg when immersed in water. The ratio of the volume of the cavity to the volume of the material of
the body must be
(A)
(B)
(C) 1
(D)
4​

Answer 1

g$<marquee>An electron is confined to a box of an atom so that one side of the box has length d=0.1nm. Calculate the uncertainty in momentum of the electron.</marquee>$

$<marquee>hope this help you mate</marquee>$

$<marquee>thanks</marquee>$

bai...take care...