3. A particle of mass m located at a distance d from one end of a uniform rod, as in Fig. 2. The mass of the rod is M, and the length is L. Find the "escape speed" of the particle. (A)(B)(C) (D) (E)

11. As shown in Fig. 6, an electrical hot plate inside a chamber generates heat in a rate of P = 100 W. One of the chamber walls is made of copper with thermal conductivity kCu = 401 W/m·K. The other walls are fiber wool which are nearly thermal insulated with kfiber = 0.048 W/m·K. The copper wall thickness is 3 mm, and the cross-section area is 0.1 cm². If the temperature outside the chamber is TL = 20 °C, in condition of thermal equilibrium, the temperature TH inside the chamber is (A) 24.8 °C (B) 34.8 °C (C) 58.8 °C (D) 84.8 °C (E) 94.8 °C

3. A particle of mass m located at a distance d from one end of a uniform rod, as in Fig. 2. The mass of the rod is M, and the length is L. Find the "escape speed" of the particle.

(A)
(B)
(C)
(D)
(E)

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