Exemple 2.24 Une roue tourne initialement à une fréquence de fo = 25 Hz. À un temps t = 6s, elle est accélérée jusqu'à une fréquence de f = 60 Hz en 4 secondes et maintient ce rythme constant. À l'aide d'un graphique OT,
calculez combien de tours elle franchit entre t = 0 et t = 16s.

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.