Figure 22-44 Problem: 17. Module 22-3 The Electric Field Due to a Dipole (2-18) The electric field of an electric dipole along the dipole axis is approximated by Eqs, \( 22-8 \) and \( 22-9 \). If a binomial expansion is made of Eq. \( 22-7 \), what is the next term in the expression for the di- pole's electric field along the dipole axis? That is, what is \( E_{\text {nex }} \) in the expression \[ E=\frac{1}{2} \frac{q d}{3}+E_{\text {next }} \text { ? } \]

Quelle est l'unité de la valeur d'une tension? Quelle est l'unité de la valeur d'une intensité ?

(a) 8 (b) \( 8 \sqrt{2} \quad(c) 8 \sqrt{3} \quad(d) 12 \) (49) A uniform rod \( \overline{A B} \) of length 6 meters and weight \( 8 \mathrm{~kg} \cdot \mathrm{wt} \). is attached to a hinge fixed in a vertical wall at its end A the rod is kept horizontal by attaching it at a point C on the rod (where \( A C=4 \) meters) by a string which its other end is fixed at the point D on the wall above A exactly and at a distance 4 meters from it. Calculate the magnitude of the tension in the string and the reaction of the hinge.

Una palla di massa \( m_{1}=24 \mathrm{~g} \), che viaggia alla velocità \( v_{1} \), urta elasticamente una palla ferma di massa \( m_{2}=\frac{1}{2} m_{1} \). Dopo l'urto, la seconda palla va a colpire elasticamente una terza palla ferma, di massa \( m_{3} \). Tutti gli urti avven- gono lungo la stessa retta. Quale deve essere la massa \( m_{3} \) affinché la sua velocita dopo l'urto sia uguale a \( v_{1} \) ?

हल दिया है-गेंद का प्रारम्भिक वेग \( 20 \mathrm{~cm} \mathrm{~s}^{-1} \) है। मेज के द्वारा गेंद पर घर्षण बल लगने के कारण गेंद का वेग 10 s में शून्य हो जाता है। वेग-समय ग्राफ एक सरल रेखा है जिससे यह पता चलता है कि गेंद एक नियत त्वरित बल के साथ चलती है।

(c) When the temperature reaches \( -18^{\circ} \mathrm{C} \), the pressure of the gas in the cylinder is still equal to that of the atmosphere. Explain, in terms of the particles of the gas, how the pressure remains equal to its original value. Explain, in terms of the particles of the metal, why the decrease in the volume of the metal is less than that of the gas. decrease in the volume of the metal is much less than the decrease in the volume of the gas.