Uranium-235 $\left({}_{92}^{235}\mathrm{U}\right)$ is a radioactive isotope of uranium that occurs naturally on Earth.
Xenon-140 $\left({}_{54}^{140}\mathrm{Xe}\right)$ is radioactive. It decays by $\beta$-emission to isotope $\mathrm{Q}$.
Determine:
(i) the proton number of $Q$
(ii) the nucleon number of $Q$.

find average velocity when body travels first half time with speed v1 and next hlaf time with speed v2

4

Two wires with the same Young modulus E and cross-sectional area A, but different lengths L, are subject to different tensile forces F. The extension e of each wire is the same.

The column headings in the table show four different quantities.

Which quantities have the same value and which quantities have different values for the two